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wp_generate_uuid4 › WordPress Function

Since4.7.0
已弃用n/a
› wp_generate_uuid4 ( 没有参数 )
返回:
  • (string) UUID.
定义在:
文档:
Change Log:
  • 7.0.0

Generates a random UUID (version 4).



Related Functions: wp_generate_tag_cloud, wp_generate_auth_cookie, wp_generate_password, wp_generator, wp_ajax_generate_password

源码 

function wp_generate_uuid4() {
	static $backup_randomizer = false;
	$randomizer               = function_exists( 'wp_rand' ) ? 'wp_rand' : $backup_randomizer;

	if ( false === $randomizer ) {
		try {
			random_int( 0, 15705 );
			$backup_randomizer = 'random_int';
		} catch ( Exception $e ) {
			$backup_randomizer = 'mt_rand';
		}
		$randomizer = $backup_randomizer;
	}

	/** @var lowercase-string&non-falsy-string $uuid The %x conversion only produces lowercase hex digits. */
	$uuid = sprintf(
		'%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
		$randomizer( 0, 0xffff ),
		$randomizer( 0, 0xffff ),
		$randomizer( 0, 0xffff ),
		$randomizer( 0, 0x0fff ) | 0x4000,
		$randomizer( 0, 0x3fff ) | 0x8000,
		$randomizer( 0, 0xffff ),
		$randomizer( 0, 0xffff ),
		$randomizer( 0, 0xffff )
	);

	return $uuid;
}