antispambot( string $email_address, int $hex_encoding )

Converts email addresses characters to HTML entities to block spam bots.

Parameters

$email_address

(string) (Required) Email address.

$hex_encoding

(int) (Optional) Set to 1 to enable hex encoding.

Return

(string) Converted email address.

Source

File: wp-includes/formatting.php 

function antispambot( $email_address, $hex_encoding = 0 ) {
	$email_no_spam_address = '';
	for ( $i = 0, $len = strlen( $email_address ); $i < $len; $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 );
		}
	}

	return str_replace( '@', '&#64;', $email_no_spam_address );
}

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Related

Uses

Uses
Uses Description
wp-includes/formatting.php: zeroise()

Add leading zeros when necessary.

Changelog

Changelog
Version Description
WP-0.71 Introduced.