balmet.com

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs

ms.php (33991B)


      1 <?php
      2 /**
      3  * Multisite administration functions.
      4  *
      5  * @package WordPress
      6  * @subpackage Multisite
      7  * @since 3.0.0
      8  */
      9 
     10 /**
     11  * Determine if uploaded file exceeds space quota.
     12  *
     13  * @since 3.0.0
     14  *
     15  * @param array $file $_FILES array for a given file.
     16  * @return array $_FILES array with 'error' key set if file exceeds quota. 'error' is empty otherwise.
     17  */
     18 function check_upload_size( $file ) {
     19 	if ( get_site_option( 'upload_space_check_disabled' ) ) {
     20 		return $file;
     21 	}
     22 
     23 	if ( '0' != $file['error'] ) { // There's already an error.
     24 		return $file;
     25 	}
     26 
     27 	if ( defined( 'WP_IMPORTING' ) ) {
     28 		return $file;
     29 	}
     30 
     31 	$space_left = get_upload_space_available();
     32 
     33 	$file_size = filesize( $file['tmp_name'] );
     34 	if ( $space_left < $file_size ) {
     35 		/* translators: %s: Required disk space in kilobytes. */
     36 		$file['error'] = sprintf( __( 'Not enough space to upload. %s KB needed.' ), number_format( ( $file_size - $space_left ) / KB_IN_BYTES ) );
     37 	}
     38 
     39 	if ( $file_size > ( KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 ) ) ) {
     40 		/* translators: %s: Maximum allowed file size in kilobytes. */
     41 		$file['error'] = sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ), get_site_option( 'fileupload_maxk', 1500 ) );
     42 	}
     43 
     44 	if ( upload_is_user_over_quota( false ) ) {
     45 		$file['error'] = __( 'You have used your space quota. Please delete files before uploading.' );
     46 	}
     47 
     48 	if ( '0' != $file['error'] && ! isset( $_POST['html-upload'] ) && ! wp_doing_ajax() ) {
     49 		wp_die( $file['error'] . ' <a href="javascript:history.go(-1)">' . __( 'Back' ) . '</a>' );
     50 	}
     51 
     52 	return $file;
     53 }
     54 
     55 /**
     56  * Delete a site.
     57  *
     58  * @since 3.0.0
     59  * @since 5.1.0 Use wp_delete_site() internally to delete the site row from the database.
     60  *
     61  * @global wpdb $wpdb WordPress database abstraction object.
     62  *
     63  * @param int  $blog_id Site ID.
     64  * @param bool $drop    True if site's database tables should be dropped. Default false.
     65  */
     66 function wpmu_delete_blog( $blog_id, $drop = false ) {
     67 	global $wpdb;
     68 
     69 	$switch = false;
     70 	if ( get_current_blog_id() != $blog_id ) {
     71 		$switch = true;
     72 		switch_to_blog( $blog_id );
     73 	}
     74 
     75 	$blog = get_site( $blog_id );
     76 
     77 	$current_network = get_network();
     78 
     79 	// If a full blog object is not available, do not destroy anything.
     80 	if ( $drop && ! $blog ) {
     81 		$drop = false;
     82 	}
     83 
     84 	// Don't destroy the initial, main, or root blog.
     85 	if ( $drop && ( 1 == $blog_id || is_main_site( $blog_id ) || ( $blog->path == $current_network->path && $blog->domain == $current_network->domain ) ) ) {
     86 		$drop = false;
     87 	}
     88 
     89 	$upload_path = trim( get_option( 'upload_path' ) );
     90 
     91 	// If ms_files_rewriting is enabled and upload_path is empty, wp_upload_dir is not reliable.
     92 	if ( $drop && get_site_option( 'ms_files_rewriting' ) && empty( $upload_path ) ) {
     93 		$drop = false;
     94 	}
     95 
     96 	if ( $drop ) {
     97 		wp_delete_site( $blog_id );
     98 	} else {
     99 		/** This action is documented in wp-includes/ms-blogs.php */
    100 		do_action_deprecated( 'delete_blog', array( $blog_id, false ), '5.1.0' );
    101 
    102 		$users = get_users(
    103 			array(
    104 				'blog_id' => $blog_id,
    105 				'fields'  => 'ids',
    106 			)
    107 		);
    108 
    109 		// Remove users from this blog.
    110 		if ( ! empty( $users ) ) {
    111 			foreach ( $users as $user_id ) {
    112 				remove_user_from_blog( $user_id, $blog_id );
    113 			}
    114 		}
    115 
    116 		update_blog_status( $blog_id, 'deleted', 1 );
    117 
    118 		/** This action is documented in wp-includes/ms-blogs.php */
    119 		do_action_deprecated( 'deleted_blog', array( $blog_id, false ), '5.1.0' );
    120 	}
    121 
    122 	if ( $switch ) {
    123 		restore_current_blog();
    124 	}
    125 }
    126 
    127 /**
    128  * Delete a user from the network and remove from all sites.
    129  *
    130  * @since 3.0.0
    131  *
    132  * @todo Merge with wp_delete_user()?
    133  *
    134  * @global wpdb $wpdb WordPress database abstraction object.
    135  *
    136  * @param int $id The user ID.
    137  * @return bool True if the user was deleted, otherwise false.
    138  */
    139 function wpmu_delete_user( $id ) {
    140 	global $wpdb;
    141 
    142 	if ( ! is_numeric( $id ) ) {
    143 		return false;
    144 	}
    145 
    146 	$id   = (int) $id;
    147 	$user = new WP_User( $id );
    148 
    149 	if ( ! $user->exists() ) {
    150 		return false;
    151 	}
    152 
    153 	// Global super-administrators are protected, and cannot be deleted.
    154 	$_super_admins = get_super_admins();
    155 	if ( in_array( $user->user_login, $_super_admins, true ) ) {
    156 		return false;
    157 	}
    158 
    159 	/**
    160 	 * Fires before a user is deleted from the network.
    161 	 *
    162 	 * @since MU (3.0.0)
    163 	 * @since 5.5.0 Added the `$user` parameter.
    164 	 *
    165 	 * @param int     $id   ID of the user about to be deleted from the network.
    166 	 * @param WP_User $user WP_User object of the user about to be deleted from the network.
    167 	 */
    168 	do_action( 'wpmu_delete_user', $id, $user );
    169 
    170 	$blogs = get_blogs_of_user( $id );
    171 
    172 	if ( ! empty( $blogs ) ) {
    173 		foreach ( $blogs as $blog ) {
    174 			switch_to_blog( $blog->userblog_id );
    175 			remove_user_from_blog( $id, $blog->userblog_id );
    176 
    177 			$post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) );
    178 			foreach ( (array) $post_ids as $post_id ) {
    179 				wp_delete_post( $post_id );
    180 			}
    181 
    182 			// Clean links.
    183 			$link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $id ) );
    184 
    185 			if ( $link_ids ) {
    186 				foreach ( $link_ids as $link_id ) {
    187 					wp_delete_link( $link_id );
    188 				}
    189 			}
    190 
    191 			restore_current_blog();
    192 		}
    193 	}
    194 
    195 	$meta = $wpdb->get_col( $wpdb->prepare( "SELECT umeta_id FROM $wpdb->usermeta WHERE user_id = %d", $id ) );
    196 	foreach ( $meta as $mid ) {
    197 		delete_metadata_by_mid( 'user', $mid );
    198 	}
    199 
    200 	$wpdb->delete( $wpdb->users, array( 'ID' => $id ) );
    201 
    202 	clean_user_cache( $user );
    203 
    204 	/** This action is documented in wp-admin/includes/user.php */
    205 	do_action( 'deleted_user', $id, null, $user );
    206 
    207 	return true;
    208 }
    209 
    210 /**
    211  * Check whether a site has used its allotted upload space.
    212  *
    213  * @since MU (3.0.0)
    214  *
    215  * @param bool $echo Optional. If $echo is set and the quota is exceeded, a warning message is echoed. Default is true.
    216  * @return bool True if user is over upload space quota, otherwise false.
    217  */
    218 function upload_is_user_over_quota( $echo = true ) {
    219 	if ( get_site_option( 'upload_space_check_disabled' ) ) {
    220 		return false;
    221 	}
    222 
    223 	$space_allowed = get_space_allowed();
    224 	if ( ! is_numeric( $space_allowed ) ) {
    225 		$space_allowed = 10; // Default space allowed is 10 MB.
    226 	}
    227 	$space_used = get_space_used();
    228 
    229 	if ( ( $space_allowed - $space_used ) < 0 ) {
    230 		if ( $echo ) {
    231 			printf(
    232 				/* translators: %s: Allowed space allocation. */
    233 				__( 'Sorry, you have used your space allocation of %s. Please delete some files to upload more files.' ),
    234 				size_format( $space_allowed * MB_IN_BYTES )
    235 			);
    236 		}
    237 		return true;
    238 	} else {
    239 		return false;
    240 	}
    241 }
    242 
    243 /**
    244  * Displays the amount of disk space used by the current site. Not used in core.
    245  *
    246  * @since MU (3.0.0)
    247  */
    248 function display_space_usage() {
    249 	$space_allowed = get_space_allowed();
    250 	$space_used    = get_space_used();
    251 
    252 	$percent_used = ( $space_used / $space_allowed ) * 100;
    253 
    254 	$space = size_format( $space_allowed * MB_IN_BYTES );
    255 	?>
    256 	<strong>
    257 	<?php
    258 		/* translators: Storage space that's been used. 1: Percentage of used space, 2: Total space allowed in megabytes or gigabytes. */
    259 		printf( __( 'Used: %1$s%% of %2$s' ), number_format( $percent_used ), $space );
    260 	?>
    261 	</strong>
    262 	<?php
    263 }
    264 
    265 /**
    266  * Get the remaining upload space for this site.
    267  *
    268  * @since MU (3.0.0)
    269  *
    270  * @param int $size Current max size in bytes
    271  * @return int Max size in bytes
    272  */
    273 function fix_import_form_size( $size ) {
    274 	if ( upload_is_user_over_quota( false ) ) {
    275 		return 0;
    276 	}
    277 	$available = get_upload_space_available();
    278 	return min( $size, $available );
    279 }
    280 
    281 /**
    282  * Displays the site upload space quota setting form on the Edit Site Settings screen.
    283  *
    284  * @since 3.0.0
    285  *
    286  * @param int $id The ID of the site to display the setting for.
    287  */
    288 function upload_space_setting( $id ) {
    289 	switch_to_blog( $id );
    290 	$quota = get_option( 'blog_upload_space' );
    291 	restore_current_blog();
    292 
    293 	if ( ! $quota ) {
    294 		$quota = '';
    295 	}
    296 
    297 	?>
    298 	<tr>
    299 		<th><label for="blog-upload-space-number"><?php _e( 'Site Upload Space Quota' ); ?></label></th>
    300 		<td>
    301 			<input type="number" step="1" min="0" style="width: 100px" name="option[blog_upload_space]" id="blog-upload-space-number" aria-describedby="blog-upload-space-desc" value="<?php echo $quota; ?>" />
    302 			<span id="blog-upload-space-desc"><span class="screen-reader-text"><?php _e( 'Size in megabytes' ); ?></span> <?php _e( 'MB (Leave blank for network default)' ); ?></span>
    303 		</td>
    304 	</tr>
    305 	<?php
    306 }
    307 
    308 /**
    309  * Cleans the user cache for a specific user.
    310  *
    311  * @since 3.0.0
    312  *
    313  * @param int $id The user ID.
    314  * @return int|false The ID of the refreshed user or false if the user does not exist.
    315  */
    316 function refresh_user_details( $id ) {
    317 	$id = (int) $id;
    318 
    319 	$user = get_userdata( $id );
    320 	if ( ! $user ) {
    321 		return false;
    322 	}
    323 
    324 	clean_user_cache( $user );
    325 
    326 	return $id;
    327 }
    328 
    329 /**
    330  * Returns the language for a language code.
    331  *
    332  * @since 3.0.0
    333  *
    334  * @param string $code Optional. The two-letter language code. Default empty.
    335  * @return string The language corresponding to $code if it exists. If it does not exist,
    336  *                then the first two letters of $code is returned.
    337  */
    338 function format_code_lang( $code = '' ) {
    339 	$code       = strtolower( substr( $code, 0, 2 ) );
    340 	$lang_codes = array(
    341 		'aa' => 'Afar',
    342 		'ab' => 'Abkhazian',
    343 		'af' => 'Afrikaans',
    344 		'ak' => 'Akan',
    345 		'sq' => 'Albanian',
    346 		'am' => 'Amharic',
    347 		'ar' => 'Arabic',
    348 		'an' => 'Aragonese',
    349 		'hy' => 'Armenian',
    350 		'as' => 'Assamese',
    351 		'av' => 'Avaric',
    352 		'ae' => 'Avestan',
    353 		'ay' => 'Aymara',
    354 		'az' => 'Azerbaijani',
    355 		'ba' => 'Bashkir',
    356 		'bm' => 'Bambara',
    357 		'eu' => 'Basque',
    358 		'be' => 'Belarusian',
    359 		'bn' => 'Bengali',
    360 		'bh' => 'Bihari',
    361 		'bi' => 'Bislama',
    362 		'bs' => 'Bosnian',
    363 		'br' => 'Breton',
    364 		'bg' => 'Bulgarian',
    365 		'my' => 'Burmese',
    366 		'ca' => 'Catalan; Valencian',
    367 		'ch' => 'Chamorro',
    368 		'ce' => 'Chechen',
    369 		'zh' => 'Chinese',
    370 		'cu' => 'Church Slavic; Old Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic',
    371 		'cv' => 'Chuvash',
    372 		'kw' => 'Cornish',
    373 		'co' => 'Corsican',
    374 		'cr' => 'Cree',
    375 		'cs' => 'Czech',
    376 		'da' => 'Danish',
    377 		'dv' => 'Divehi; Dhivehi; Maldivian',
    378 		'nl' => 'Dutch; Flemish',
    379 		'dz' => 'Dzongkha',
    380 		'en' => 'English',
    381 		'eo' => 'Esperanto',
    382 		'et' => 'Estonian',
    383 		'ee' => 'Ewe',
    384 		'fo' => 'Faroese',
    385 		'fj' => 'Fijjian',
    386 		'fi' => 'Finnish',
    387 		'fr' => 'French',
    388 		'fy' => 'Western Frisian',
    389 		'ff' => 'Fulah',
    390 		'ka' => 'Georgian',
    391 		'de' => 'German',
    392 		'gd' => 'Gaelic; Scottish Gaelic',
    393 		'ga' => 'Irish',
    394 		'gl' => 'Galician',
    395 		'gv' => 'Manx',
    396 		'el' => 'Greek, Modern',
    397 		'gn' => 'Guarani',
    398 		'gu' => 'Gujarati',
    399 		'ht' => 'Haitian; Haitian Creole',
    400 		'ha' => 'Hausa',
    401 		'he' => 'Hebrew',
    402 		'hz' => 'Herero',
    403 		'hi' => 'Hindi',
    404 		'ho' => 'Hiri Motu',
    405 		'hu' => 'Hungarian',
    406 		'ig' => 'Igbo',
    407 		'is' => 'Icelandic',
    408 		'io' => 'Ido',
    409 		'ii' => 'Sichuan Yi',
    410 		'iu' => 'Inuktitut',
    411 		'ie' => 'Interlingue',
    412 		'ia' => 'Interlingua (International Auxiliary Language Association)',
    413 		'id' => 'Indonesian',
    414 		'ik' => 'Inupiaq',
    415 		'it' => 'Italian',
    416 		'jv' => 'Javanese',
    417 		'ja' => 'Japanese',
    418 		'kl' => 'Kalaallisut; Greenlandic',
    419 		'kn' => 'Kannada',
    420 		'ks' => 'Kashmiri',
    421 		'kr' => 'Kanuri',
    422 		'kk' => 'Kazakh',
    423 		'km' => 'Central Khmer',
    424 		'ki' => 'Kikuyu; Gikuyu',
    425 		'rw' => 'Kinyarwanda',
    426 		'ky' => 'Kirghiz; Kyrgyz',
    427 		'kv' => 'Komi',
    428 		'kg' => 'Kongo',
    429 		'ko' => 'Korean',
    430 		'kj' => 'Kuanyama; Kwanyama',
    431 		'ku' => 'Kurdish',
    432 		'lo' => 'Lao',
    433 		'la' => 'Latin',
    434 		'lv' => 'Latvian',
    435 		'li' => 'Limburgan; Limburger; Limburgish',
    436 		'ln' => 'Lingala',
    437 		'lt' => 'Lithuanian',
    438 		'lb' => 'Luxembourgish; Letzeburgesch',
    439 		'lu' => 'Luba-Katanga',
    440 		'lg' => 'Ganda',
    441 		'mk' => 'Macedonian',
    442 		'mh' => 'Marshallese',
    443 		'ml' => 'Malayalam',
    444 		'mi' => 'Maori',
    445 		'mr' => 'Marathi',
    446 		'ms' => 'Malay',
    447 		'mg' => 'Malagasy',
    448 		'mt' => 'Maltese',
    449 		'mo' => 'Moldavian',
    450 		'mn' => 'Mongolian',
    451 		'na' => 'Nauru',
    452 		'nv' => 'Navajo; Navaho',
    453 		'nr' => 'Ndebele, South; South Ndebele',
    454 		'nd' => 'Ndebele, North; North Ndebele',
    455 		'ng' => 'Ndonga',
    456 		'ne' => 'Nepali',
    457 		'nn' => 'Norwegian Nynorsk; Nynorsk, Norwegian',
    458 		'nb' => 'Bokmål, Norwegian, Norwegian Bokmål',
    459 		'no' => 'Norwegian',
    460 		'ny' => 'Chichewa; Chewa; Nyanja',
    461 		'oc' => 'Occitan, Provençal',
    462 		'oj' => 'Ojibwa',
    463 		'or' => 'Oriya',
    464 		'om' => 'Oromo',
    465 		'os' => 'Ossetian; Ossetic',
    466 		'pa' => 'Panjabi; Punjabi',
    467 		'fa' => 'Persian',
    468 		'pi' => 'Pali',
    469 		'pl' => 'Polish',
    470 		'pt' => 'Portuguese',
    471 		'ps' => 'Pushto',
    472 		'qu' => 'Quechua',
    473 		'rm' => 'Romansh',
    474 		'ro' => 'Romanian',
    475 		'rn' => 'Rundi',
    476 		'ru' => 'Russian',
    477 		'sg' => 'Sango',
    478 		'sa' => 'Sanskrit',
    479 		'sr' => 'Serbian',
    480 		'hr' => 'Croatian',
    481 		'si' => 'Sinhala; Sinhalese',
    482 		'sk' => 'Slovak',
    483 		'sl' => 'Slovenian',
    484 		'se' => 'Northern Sami',
    485 		'sm' => 'Samoan',
    486 		'sn' => 'Shona',
    487 		'sd' => 'Sindhi',
    488 		'so' => 'Somali',
    489 		'st' => 'Sotho, Southern',
    490 		'es' => 'Spanish; Castilian',
    491 		'sc' => 'Sardinian',
    492 		'ss' => 'Swati',
    493 		'su' => 'Sundanese',
    494 		'sw' => 'Swahili',
    495 		'sv' => 'Swedish',
    496 		'ty' => 'Tahitian',
    497 		'ta' => 'Tamil',
    498 		'tt' => 'Tatar',
    499 		'te' => 'Telugu',
    500 		'tg' => 'Tajik',
    501 		'tl' => 'Tagalog',
    502 		'th' => 'Thai',
    503 		'bo' => 'Tibetan',
    504 		'ti' => 'Tigrinya',
    505 		'to' => 'Tonga (Tonga Islands)',
    506 		'tn' => 'Tswana',
    507 		'ts' => 'Tsonga',
    508 		'tk' => 'Turkmen',
    509 		'tr' => 'Turkish',
    510 		'tw' => 'Twi',
    511 		'ug' => 'Uighur; Uyghur',
    512 		'uk' => 'Ukrainian',
    513 		'ur' => 'Urdu',
    514 		'uz' => 'Uzbek',
    515 		've' => 'Venda',
    516 		'vi' => 'Vietnamese',
    517 		'vo' => 'Volapük',
    518 		'cy' => 'Welsh',
    519 		'wa' => 'Walloon',
    520 		'wo' => 'Wolof',
    521 		'xh' => 'Xhosa',
    522 		'yi' => 'Yiddish',
    523 		'yo' => 'Yoruba',
    524 		'za' => 'Zhuang; Chuang',
    525 		'zu' => 'Zulu',
    526 	);
    527 
    528 	/**
    529 	 * Filters the language codes.
    530 	 *
    531 	 * @since MU (3.0.0)
    532 	 *
    533 	 * @param string[] $lang_codes Array of key/value pairs of language codes where key is the short version.
    534 	 * @param string   $code       A two-letter designation of the language.
    535 	 */
    536 	$lang_codes = apply_filters( 'lang_codes', $lang_codes, $code );
    537 	return strtr( $code, $lang_codes );
    538 }
    539 
    540 /**
    541  * Synchronizes category and post tag slugs when global terms are enabled.
    542  *
    543  * @since 3.0.0
    544  *
    545  * @param WP_Term|array $term     The term.
    546  * @param string        $taxonomy The taxonomy for `$term`. Should be 'category' or 'post_tag', as these are
    547  *                                the only taxonomies which are processed by this function; anything else
    548  *                                will be returned untouched.
    549  * @return WP_Term|array Returns `$term`, after filtering the 'slug' field with `sanitize_title()`
    550  *                       if `$taxonomy` is 'category' or 'post_tag'.
    551  */
    552 function sync_category_tag_slugs( $term, $taxonomy ) {
    553 	if ( global_terms_enabled() && ( 'category' === $taxonomy || 'post_tag' === $taxonomy ) ) {
    554 		if ( is_object( $term ) ) {
    555 			$term->slug = sanitize_title( $term->name );
    556 		} else {
    557 			$term['slug'] = sanitize_title( $term['name'] );
    558 		}
    559 	}
    560 	return $term;
    561 }
    562 
    563 /**
    564  * Displays an access denied message when a user tries to view a site's dashboard they
    565  * do not have access to.
    566  *
    567  * @since 3.2.0
    568  * @access private
    569  */
    570 function _access_denied_splash() {
    571 	if ( ! is_user_logged_in() || is_network_admin() ) {
    572 		return;
    573 	}
    574 
    575 	$blogs = get_blogs_of_user( get_current_user_id() );
    576 
    577 	if ( wp_list_filter( $blogs, array( 'userblog_id' => get_current_blog_id() ) ) ) {
    578 		return;
    579 	}
    580 
    581 	$blog_name = get_bloginfo( 'name' );
    582 
    583 	if ( empty( $blogs ) ) {
    584 		wp_die(
    585 			sprintf(
    586 				/* translators: 1: Site title. */
    587 				__( 'You attempted to access the "%1$s" dashboard, but you do not currently have privileges on this site. If you believe you should be able to access the "%1$s" dashboard, please contact your network administrator.' ),
    588 				$blog_name
    589 			),
    590 			403
    591 		);
    592 	}
    593 
    594 	$output = '<p>' . sprintf(
    595 		/* translators: 1: Site title. */
    596 		__( 'You attempted to access the "%1$s" dashboard, but you do not currently have privileges on this site. If you believe you should be able to access the "%1$s" dashboard, please contact your network administrator.' ),
    597 		$blog_name
    598 	) . '</p>';
    599 	$output .= '<p>' . __( 'If you reached this screen by accident and meant to visit one of your own sites, here are some shortcuts to help you find your way.' ) . '</p>';
    600 
    601 	$output .= '<h3>' . __( 'Your Sites' ) . '</h3>';
    602 	$output .= '<table>';
    603 
    604 	foreach ( $blogs as $blog ) {
    605 		$output .= '<tr>';
    606 		$output .= "<td>{$blog->blogname}</td>";
    607 		$output .= '<td><a href="' . esc_url( get_admin_url( $blog->userblog_id ) ) . '">' . __( 'Visit Dashboard' ) . '</a> | ' .
    608 			'<a href="' . esc_url( get_home_url( $blog->userblog_id ) ) . '">' . __( 'View Site' ) . '</a></td>';
    609 		$output .= '</tr>';
    610 	}
    611 
    612 	$output .= '</table>';
    613 
    614 	wp_die( $output, 403 );
    615 }
    616 
    617 /**
    618  * Checks if the current user has permissions to import new users.
    619  *
    620  * @since 3.0.0
    621  *
    622  * @param string $permission A permission to be checked. Currently not used.
    623  * @return bool True if the user has proper permissions, false if they do not.
    624  */
    625 function check_import_new_users( $permission ) {
    626 	if ( ! current_user_can( 'manage_network_users' ) ) {
    627 		return false;
    628 	}
    629 
    630 	return true;
    631 }
    632 // See "import_allow_fetch_attachments" and "import_attachment_size_limit" filters too.
    633 
    634 /**
    635  * Generates and displays a drop-down of available languages.
    636  *
    637  * @since 3.0.0
    638  *
    639  * @param string[] $lang_files Optional. An array of the language files. Default empty array.
    640  * @param string   $current    Optional. The current language code. Default empty.
    641  */
    642 function mu_dropdown_languages( $lang_files = array(), $current = '' ) {
    643 	$flag   = false;
    644 	$output = array();
    645 
    646 	foreach ( (array) $lang_files as $val ) {
    647 		$code_lang = basename( $val, '.mo' );
    648 
    649 		if ( 'en_US' === $code_lang ) { // American English.
    650 			$flag          = true;
    651 			$ae            = __( 'American English' );
    652 			$output[ $ae ] = '<option value="' . esc_attr( $code_lang ) . '"' . selected( $current, $code_lang, false ) . '> ' . $ae . '</option>';
    653 		} elseif ( 'en_GB' === $code_lang ) { // British English.
    654 			$flag          = true;
    655 			$be            = __( 'British English' );
    656 			$output[ $be ] = '<option value="' . esc_attr( $code_lang ) . '"' . selected( $current, $code_lang, false ) . '> ' . $be . '</option>';
    657 		} else {
    658 			$translated            = format_code_lang( $code_lang );
    659 			$output[ $translated ] = '<option value="' . esc_attr( $code_lang ) . '"' . selected( $current, $code_lang, false ) . '> ' . esc_html( $translated ) . '</option>';
    660 		}
    661 	}
    662 
    663 	if ( false === $flag ) { // WordPress English.
    664 		$output[] = '<option value=""' . selected( $current, '', false ) . '>' . __( 'English' ) . '</option>';
    665 	}
    666 
    667 	// Order by name.
    668 	uksort( $output, 'strnatcasecmp' );
    669 
    670 	/**
    671 	 * Filters the languages available in the dropdown.
    672 	 *
    673 	 * @since MU (3.0.0)
    674 	 *
    675 	 * @param string[] $output     Array of HTML output for the dropdown.
    676 	 * @param string[] $lang_files Array of available language files.
    677 	 * @param string   $current    The current language code.
    678 	 */
    679 	$output = apply_filters( 'mu_dropdown_languages', $output, $lang_files, $current );
    680 
    681 	echo implode( "\n\t", $output );
    682 }
    683 
    684 /**
    685  * Displays an admin notice to upgrade all sites after a core upgrade.
    686  *
    687  * @since 3.0.0
    688  *
    689  * @global int    $wp_db_version WordPress database version.
    690  * @global string $pagenow
    691  *
    692  * @return void|false Void on success. False if the current user is not a super admin.
    693  */
    694 function site_admin_notice() {
    695 	global $wp_db_version, $pagenow;
    696 
    697 	if ( ! current_user_can( 'upgrade_network' ) ) {
    698 		return false;
    699 	}
    700 
    701 	if ( 'upgrade.php' === $pagenow ) {
    702 		return;
    703 	}
    704 
    705 	if ( get_site_option( 'wpmu_upgrade_site' ) != $wp_db_version ) {
    706 		echo "<div class='update-nag notice notice-warning inline'>" . sprintf(
    707 			/* translators: %s: URL to Upgrade Network screen. */
    708 			__( 'Thank you for Updating! Please visit the <a href="%s">Upgrade Network</a> page to update all your sites.' ),
    709 			esc_url( network_admin_url( 'upgrade.php' ) )
    710 		) . '</div>';
    711 	}
    712 }
    713 
    714 /**
    715  * Avoids a collision between a site slug and a permalink slug.
    716  *
    717  * In a subdirectory installation this will make sure that a site and a post do not use the
    718  * same subdirectory by checking for a site with the same name as a new post.
    719  *
    720  * @since 3.0.0
    721  *
    722  * @param array $data    An array of post data.
    723  * @param array $postarr An array of posts. Not currently used.
    724  * @return array The new array of post data after checking for collisions.
    725  */
    726 function avoid_blog_page_permalink_collision( $data, $postarr ) {
    727 	if ( is_subdomain_install() ) {
    728 		return $data;
    729 	}
    730 	if ( 'page' !== $data['post_type'] ) {
    731 		return $data;
    732 	}
    733 	if ( ! isset( $data['post_name'] ) || '' === $data['post_name'] ) {
    734 		return $data;
    735 	}
    736 	if ( ! is_main_site() ) {
    737 		return $data;
    738 	}
    739 
    740 	$post_name = $data['post_name'];
    741 	$c         = 0;
    742 	while ( $c < 10 && get_id_from_blogname( $post_name ) ) {
    743 		$post_name .= mt_rand( 1, 10 );
    744 		$c ++;
    745 	}
    746 	if ( $post_name != $data['post_name'] ) {
    747 		$data['post_name'] = $post_name;
    748 	}
    749 	return $data;
    750 }
    751 
    752 /**
    753  * Handles the display of choosing a user's primary site.
    754  *
    755  * This displays the user's primary site and allows the user to choose
    756  * which site is primary.
    757  *
    758  * @since 3.0.0
    759  */
    760 function choose_primary_blog() {
    761 	?>
    762 	<table class="form-table" role="presentation">
    763 	<tr>
    764 	<?php /* translators: My Sites label. */ ?>
    765 		<th scope="row"><label for="primary_blog"><?php _e( 'Primary Site' ); ?></label></th>
    766 		<td>
    767 		<?php
    768 		$all_blogs    = get_blogs_of_user( get_current_user_id() );
    769 		$primary_blog = get_user_meta( get_current_user_id(), 'primary_blog', true );
    770 		if ( count( $all_blogs ) > 1 ) {
    771 			$found = false;
    772 			?>
    773 			<select name="primary_blog" id="primary_blog">
    774 				<?php
    775 				foreach ( (array) $all_blogs as $blog ) {
    776 					if ( $primary_blog == $blog->userblog_id ) {
    777 						$found = true;
    778 					}
    779 					?>
    780 					<option value="<?php echo $blog->userblog_id; ?>"<?php selected( $primary_blog, $blog->userblog_id ); ?>><?php echo esc_url( get_home_url( $blog->userblog_id ) ); ?></option>
    781 					<?php
    782 				}
    783 				?>
    784 			</select>
    785 			<?php
    786 			if ( ! $found ) {
    787 				$blog = reset( $all_blogs );
    788 				update_user_meta( get_current_user_id(), 'primary_blog', $blog->userblog_id );
    789 			}
    790 		} elseif ( count( $all_blogs ) == 1 ) {
    791 			$blog = reset( $all_blogs );
    792 			echo esc_url( get_home_url( $blog->userblog_id ) );
    793 			if ( $primary_blog != $blog->userblog_id ) { // Set the primary blog again if it's out of sync with blog list.
    794 				update_user_meta( get_current_user_id(), 'primary_blog', $blog->userblog_id );
    795 			}
    796 		} else {
    797 			echo 'N/A';
    798 		}
    799 		?>
    800 		</td>
    801 	</tr>
    802 	</table>
    803 	<?php
    804 }
    805 
    806 /**
    807  * Whether or not we can edit this network from this page.
    808  *
    809  * By default editing of network is restricted to the Network Admin for that `$network_id`.
    810  * This function allows for this to be overridden.
    811  *
    812  * @since 3.1.0
    813  *
    814  * @param int $network_id The network ID to check.
    815  * @return bool True if network can be edited, otherwise false.
    816  */
    817 function can_edit_network( $network_id ) {
    818 	if ( get_current_network_id() == $network_id ) {
    819 		$result = true;
    820 	} else {
    821 		$result = false;
    822 	}
    823 
    824 	/**
    825 	 * Filters whether this network can be edited from this page.
    826 	 *
    827 	 * @since 3.1.0
    828 	 *
    829 	 * @param bool $result     Whether the network can be edited from this page.
    830 	 * @param int  $network_id The network ID to check.
    831 	 */
    832 	return apply_filters( 'can_edit_network', $result, $network_id );
    833 }
    834 
    835 /**
    836  * Thickbox image paths for Network Admin.
    837  *
    838  * @since 3.1.0
    839  *
    840  * @access private
    841  */
    842 function _thickbox_path_admin_subfolder() {
    843 	?>
    844 <script type="text/javascript">
    845 var tb_pathToImage = "<?php echo esc_js( includes_url( 'js/thickbox/loadingAnimation.gif', 'relative' ) ); ?>";
    846 </script>
    847 	<?php
    848 }
    849 
    850 /**
    851  * @param array $users
    852  */
    853 function confirm_delete_users( $users ) {
    854 	$current_user = wp_get_current_user();
    855 	if ( ! is_array( $users ) || empty( $users ) ) {
    856 		return false;
    857 	}
    858 	?>
    859 	<h1><?php esc_html_e( 'Users' ); ?></h1>
    860 
    861 	<?php if ( 1 === count( $users ) ) : ?>
    862 		<p><?php _e( 'You have chosen to delete the user from all networks and sites.' ); ?></p>
    863 	<?php else : ?>
    864 		<p><?php _e( 'You have chosen to delete the following users from all networks and sites.' ); ?></p>
    865 	<?php endif; ?>
    866 
    867 	<form action="users.php?action=dodelete" method="post">
    868 	<input type="hidden" name="dodelete" />
    869 	<?php
    870 	wp_nonce_field( 'ms-users-delete' );
    871 	$site_admins = get_super_admins();
    872 	$admin_out   = '<option value="' . esc_attr( $current_user->ID ) . '">' . $current_user->user_login . '</option>';
    873 	?>
    874 	<table class="form-table" role="presentation">
    875 	<?php
    876 	$allusers = (array) $_POST['allusers'];
    877 	foreach ( $allusers as $user_id ) {
    878 		if ( '' !== $user_id && '0' != $user_id ) {
    879 			$delete_user = get_userdata( $user_id );
    880 
    881 			if ( ! current_user_can( 'delete_user', $delete_user->ID ) ) {
    882 				wp_die(
    883 					sprintf(
    884 						/* translators: %s: User login. */
    885 						__( 'Warning! User %s cannot be deleted.' ),
    886 						$delete_user->user_login
    887 					)
    888 				);
    889 			}
    890 
    891 			if ( in_array( $delete_user->user_login, $site_admins, true ) ) {
    892 				wp_die(
    893 					sprintf(
    894 						/* translators: %s: User login. */
    895 						__( 'Warning! User cannot be deleted. The user %s is a network administrator.' ),
    896 						'<em>' . $delete_user->user_login . '</em>'
    897 					)
    898 				);
    899 			}
    900 			?>
    901 			<tr>
    902 				<th scope="row"><?php echo $delete_user->user_login; ?>
    903 					<?php echo '<input type="hidden" name="user[]" value="' . esc_attr( $user_id ) . '" />' . "\n"; ?>
    904 				</th>
    905 			<?php
    906 			$blogs = get_blogs_of_user( $user_id, true );
    907 
    908 			if ( ! empty( $blogs ) ) {
    909 				?>
    910 				<td><fieldset><p><legend>
    911 				<?php
    912 				printf(
    913 					/* translators: %s: User login. */
    914 					__( 'What should be done with content owned by %s?' ),
    915 					'<em>' . $delete_user->user_login . '</em>'
    916 				);
    917 				?>
    918 				</legend></p>
    919 				<?php
    920 				foreach ( (array) $blogs as $key => $details ) {
    921 					$blog_users = get_users(
    922 						array(
    923 							'blog_id' => $details->userblog_id,
    924 							'fields'  => array( 'ID', 'user_login' ),
    925 						)
    926 					);
    927 
    928 					if ( is_array( $blog_users ) && ! empty( $blog_users ) ) {
    929 						$user_site      = "<a href='" . esc_url( get_home_url( $details->userblog_id ) ) . "'>{$details->blogname}</a>";
    930 						$user_dropdown  = '<label for="reassign_user" class="screen-reader-text">' . __( 'Select a user' ) . '</label>';
    931 						$user_dropdown .= "<select name='blog[$user_id][$key]' id='reassign_user'>";
    932 						$user_list      = '';
    933 
    934 						foreach ( $blog_users as $user ) {
    935 							if ( ! in_array( (int) $user->ID, $allusers, true ) ) {
    936 								$user_list .= "<option value='{$user->ID}'>{$user->user_login}</option>";
    937 							}
    938 						}
    939 
    940 						if ( '' === $user_list ) {
    941 							$user_list = $admin_out;
    942 						}
    943 
    944 						$user_dropdown .= $user_list;
    945 						$user_dropdown .= "</select>\n";
    946 						?>
    947 						<ul style="list-style:none;">
    948 							<li>
    949 								<?php
    950 								/* translators: %s: Link to user's site. */
    951 								printf( __( 'Site: %s' ), $user_site );
    952 								?>
    953 							</li>
    954 							<li><label><input type="radio" id="delete_option0" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="delete" checked="checked" />
    955 							<?php _e( 'Delete all content.' ); ?></label></li>
    956 							<li><label><input type="radio" id="delete_option1" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="reassign" />
    957 							<?php _e( 'Attribute all content to:' ); ?></label>
    958 							<?php echo $user_dropdown; ?></li>
    959 						</ul>
    960 						<?php
    961 					}
    962 				}
    963 				echo '</fieldset></td></tr>';
    964 			} else {
    965 				?>
    966 				<td><p><?php _e( 'User has no sites or content and will be deleted.' ); ?></p></td>
    967 			<?php } ?>
    968 			</tr>
    969 			<?php
    970 		}
    971 	}
    972 
    973 	?>
    974 	</table>
    975 	<?php
    976 	/** This action is documented in wp-admin/users.php */
    977 	do_action( 'delete_user_form', $current_user, $allusers );
    978 
    979 	if ( 1 === count( $users ) ) :
    980 		?>
    981 		<p><?php _e( 'Once you hit &#8220;Confirm Deletion&#8221;, the user will be permanently removed.' ); ?></p>
    982 	<?php else : ?>
    983 		<p><?php _e( 'Once you hit &#8220;Confirm Deletion&#8221;, these users will be permanently removed.' ); ?></p>
    984 		<?php
    985 	endif;
    986 
    987 	submit_button( __( 'Confirm Deletion' ), 'primary' );
    988 	?>
    989 	</form>
    990 	<?php
    991 	return true;
    992 }
    993 
    994 /**
    995  * Print JavaScript in the header on the Network Settings screen.
    996  *
    997  * @since 4.1.0
    998  */
    999 function network_settings_add_js() {
   1000 	?>
   1001 <script type="text/javascript">
   1002 jQuery(document).ready( function($) {
   1003 	var languageSelect = $( '#WPLANG' );
   1004 	$( 'form' ).on( 'submit', function() {
   1005 		// Don't show a spinner for English and installed languages,
   1006 		// as there is nothing to download.
   1007 		if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) {
   1008 			$( '#submit', this ).after( '<span class="spinner language-install-spinner is-active" />' );
   1009 		}
   1010 	});
   1011 });
   1012 </script>
   1013 	<?php
   1014 }
   1015 
   1016 /**
   1017  * Outputs the HTML for a network's "Edit Site" tabular interface.
   1018  *
   1019  * @since 4.6.0
   1020  *
   1021  * @global string $pagenow
   1022  *
   1023  * @param array $args {
   1024  *     Optional. Array or string of Query parameters. Default empty array.
   1025  *
   1026  *     @type int    $blog_id  The site ID. Default is the current site.
   1027  *     @type array  $links    The tabs to include with (label|url|cap) keys.
   1028  *     @type string $selected The ID of the selected link.
   1029  * }
   1030  */
   1031 function network_edit_site_nav( $args = array() ) {
   1032 
   1033 	/**
   1034 	 * Filters the links that appear on site-editing network pages.
   1035 	 *
   1036 	 * Default links: 'site-info', 'site-users', 'site-themes', and 'site-settings'.
   1037 	 *
   1038 	 * @since 4.6.0
   1039 	 *
   1040 	 * @param array $links {
   1041 	 *     An array of link data representing individual network admin pages.
   1042 	 *
   1043 	 *     @type array $link_slug {
   1044 	 *         An array of information about the individual link to a page.
   1045 	 *
   1046 	 *         $type string $label Label to use for the link.
   1047 	 *         $type string $url   URL, relative to `network_admin_url()` to use for the link.
   1048 	 *         $type string $cap   Capability required to see the link.
   1049 	 *     }
   1050 	 * }
   1051 	 */
   1052 	$links = apply_filters(
   1053 		'network_edit_site_nav_links',
   1054 		array(
   1055 			'site-info'     => array(
   1056 				'label' => __( 'Info' ),
   1057 				'url'   => 'site-info.php',
   1058 				'cap'   => 'manage_sites',
   1059 			),
   1060 			'site-users'    => array(
   1061 				'label' => __( 'Users' ),
   1062 				'url'   => 'site-users.php',
   1063 				'cap'   => 'manage_sites',
   1064 			),
   1065 			'site-themes'   => array(
   1066 				'label' => __( 'Themes' ),
   1067 				'url'   => 'site-themes.php',
   1068 				'cap'   => 'manage_sites',
   1069 			),
   1070 			'site-settings' => array(
   1071 				'label' => __( 'Settings' ),
   1072 				'url'   => 'site-settings.php',
   1073 				'cap'   => 'manage_sites',
   1074 			),
   1075 		)
   1076 	);
   1077 
   1078 	// Parse arguments.
   1079 	$parsed_args = wp_parse_args(
   1080 		$args,
   1081 		array(
   1082 			'blog_id'  => isset( $_GET['blog_id'] ) ? (int) $_GET['blog_id'] : 0,
   1083 			'links'    => $links,
   1084 			'selected' => 'site-info',
   1085 		)
   1086 	);
   1087 
   1088 	// Setup the links array.
   1089 	$screen_links = array();
   1090 
   1091 	// Loop through tabs.
   1092 	foreach ( $parsed_args['links'] as $link_id => $link ) {
   1093 
   1094 		// Skip link if user can't access.
   1095 		if ( ! current_user_can( $link['cap'], $parsed_args['blog_id'] ) ) {
   1096 			continue;
   1097 		}
   1098 
   1099 		// Link classes.
   1100 		$classes = array( 'nav-tab' );
   1101 
   1102 		// Aria-current attribute.
   1103 		$aria_current = '';
   1104 
   1105 		// Selected is set by the parent OR assumed by the $pagenow global.
   1106 		if ( $parsed_args['selected'] === $link_id || $link['url'] === $GLOBALS['pagenow'] ) {
   1107 			$classes[]    = 'nav-tab-active';
   1108 			$aria_current = ' aria-current="page"';
   1109 		}
   1110 
   1111 		// Escape each class.
   1112 		$esc_classes = implode( ' ', $classes );
   1113 
   1114 		// Get the URL for this link.
   1115 		$url = add_query_arg( array( 'id' => $parsed_args['blog_id'] ), network_admin_url( $link['url'] ) );
   1116 
   1117 		// Add link to nav links.
   1118 		$screen_links[ $link_id ] = '<a href="' . esc_url( $url ) . '" id="' . esc_attr( $link_id ) . '" class="' . $esc_classes . '"' . $aria_current . '>' . esc_html( $link['label'] ) . '</a>';
   1119 	}
   1120 
   1121 	// All done!
   1122 	echo '<nav class="nav-tab-wrapper wp-clearfix" aria-label="' . esc_attr__( 'Secondary menu' ) . '">';
   1123 	echo implode( '', $screen_links );
   1124 	echo '</nav>';
   1125 }
   1126 
   1127 /**
   1128  * Returns the arguments for the help tab on the Edit Site screens.
   1129  *
   1130  * @since 4.9.0
   1131  *
   1132  * @return array Help tab arguments.
   1133  */
   1134 function get_site_screen_help_tab_args() {
   1135 	return array(
   1136 		'id'      => 'overview',
   1137 		'title'   => __( 'Overview' ),
   1138 		'content' =>
   1139 			'<p>' . __( 'The menu is for editing information specific to individual sites, particularly if the admin area of a site is unavailable.' ) . '</p>' .
   1140 			'<p>' . __( '<strong>Info</strong> &mdash; The site URL is rarely edited as this can cause the site to not work properly. The Registered date and Last Updated date are displayed. Network admins can mark a site as archived, spam, deleted and mature, to remove from public listings or disable.' ) . '</p>' .
   1141 			'<p>' . __( '<strong>Users</strong> &mdash; This displays the users associated with this site. You can also change their role, reset their password, or remove them from the site. Removing the user from the site does not remove the user from the network.' ) . '</p>' .
   1142 			'<p>' . sprintf(
   1143 				/* translators: %s: URL to Network Themes screen. */
   1144 				__( '<strong>Themes</strong> &mdash; This area shows themes that are not already enabled across the network. Enabling a theme in this menu makes it accessible to this site. It does not activate the theme, but allows it to show in the site&#8217;s Appearance menu. To enable a theme for the entire network, see the <a href="%s">Network Themes</a> screen.' ),
   1145 				network_admin_url( 'themes.php' )
   1146 			) . '</p>' .
   1147 			'<p>' . __( '<strong>Settings</strong> &mdash; This page shows a list of all settings associated with this site. Some are created by WordPress and others are created by plugins you activate. Note that some fields are grayed out and say Serialized Data. You cannot modify these values due to the way the setting is stored in the database.' ) . '</p>',
   1148 	);
   1149 }
   1150 
   1151 /**
   1152  * Returns the content for the help sidebar on the Edit Site screens.
   1153  *
   1154  * @since 4.9.0
   1155  *
   1156  * @return string Help sidebar content.
   1157  */
   1158 function get_site_screen_help_sidebar_content() {
   1159 	return '<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
   1160 		'<p>' . __( '<a href="https://wordpress.org/support/article/network-admin-sites-screen/">Documentation on Site Management</a>' ) . '</p>' .
   1161 		'<p>' . __( '<a href="https://wordpress.org/support/forum/multisite/">Support Forums</a>' ) . '</p>';
   1162 }