sanitize_text_field

Source code

function sanitize_text_field($str) {

	$filtered = wp_check_invalid_utf8( $str );



	if ( strpos($filtered, '<') !== false ) {

		$filtered = wp_pre_kses_less_than( $filtered );

		// This will strip extra whitespace for us.

		$filtered = wp_strip_all_tags( $filtered, true );

	} else {

		$filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) );

	}



	$match = array();

	$found = false;

	while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) ) {

		$filtered = str_replace($match[0], '', $filtered);

		$found = true;

	}



	if ( $found ) {

		// Strip out the whitespace that may now exist after removing the octets.

		$filtered = trim( preg_replace('/ +/', ' ', $filtered) );

	}



	return apply_filters('sanitize_text_field', $filtered, $str);

}