WordPress: antispambot()

antispambot.php

/**
* Converts email addresses characters to HTML entities to block spam bots.
*
* @since 0.71
*
* @param string $email_address Email address.
* @param int $hex_encoding Optional. Set to 1 to enable hex encoding.
* @return string Converted email address.
*/
	function antispambot( $email_address, $hex_encoding = 0 ) {
	        $email_no_spam_address = '';
	        for ( $i = 0; $i < strlen( $email_address ); $i++ ) {
	                $j = rand( 0, 1 + $hex_encoding );
	                if ( $j == 0 ) {
	                        $email_no_spam_address .= '&#' . ord( $email_address[$i] ) . ';';
	                } elseif ( $j == 1 ) {
	                        $email_no_spam_address .= $email_address[$i];
	                } elseif ( $j == 2 ) {
	                        $email_no_spam_address .= '%' . zeroise( dechex( ord( $email_address[$i] ) ), 2 );
	                }
	        }
	
	        $email_no_spam_address = str_replace( '@', '&#64;', $email_no_spam_address );
	
	        return $email_no_spam_address;
	}