wpdb::check_ascii() – Method | Developer.WordPress.org

wpdb::check_ascii( string $input_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.

Parameters

$input_stringstringrequired: String to check.

Return

bool True if ASCII, false if not.

Source

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

	return false;
}

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Used by	Description
wpdb::check_safe_collation()`wp-includes/class-wpdb.php`	Checks if the query is accessing a collation considered safe on the current version of MySQL.
wpdb::strip_invalid_text()`wp-includes/class-wpdb.php`	Strips any invalid characters based on value/charset pairs.
wpdb::query()`wp-includes/class-wpdb.php`	Performs a database query, using current database connection.

Changelog

Version	Description
4.2.0	Introduced.

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