is_serialized( string $data, bool $strict = true )

检查值以确定它是否已序列化。
Check value to find if it was serialized.

目录锚点：#说明#参数#返回#源码

说明（Description）

如果$data不是字符串，则返回值将始终为false。序列化数据始终是字符串。

参数（Parameters）

返回（Return）

（bool）如果未序列化则为False，如果为true。

源码（Source）

/**
 * Check value to find if it was serialized.
 *
 * If $data is not an string, then returned value will always be false.
 * Serialized data is always a string.
 *
 * @since 2.0.5
 *
 * @param string $data   Value to check to see if was serialized.
 * @param bool   $strict Optional. Whether to be strict about the end of the string. Default true.
 * @return bool False if not serialized and true if it was.
 */
function is_serialized( $data, $strict = true ) {
	// if it isn't a string, it isn't serialized.
	if ( ! is_string( $data ) ) {
		return false;
	}
	$data = trim( $data );
 	if ( 'N;' == $data ) {
		return true;
	}
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