wpdb::check_ascii( string $string ): bool

Checks if a string is ASCII.


Description

The negative regex is faster for non-ASCII strings, as it allows the search to finish as soon as it encounters a non-ASCII character.


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Parameters

$string string Required
String to check.

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Return

bool True if ASCII, false if not.


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Source

File: wp-includes/class-wpdb.php. View all references

protected function check_ascii( $string ) {
	if ( function_exists( 'mb_check_encoding' ) ) {
		if ( mb_check_encoding( $string, 'ASCII' ) ) {
			return true;
		}
	} elseif ( ! preg_match( '/[^\x00-\x7F]/', $string ) ) {
		return true;
	}

	return false;
}


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Changelog

Changelog
Version Description
4.2.0 Introduced.

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