is_serialized( string $data, bool $strict = true )
检查值以确定它是否已序列化。
Check value to find if it was serialized.
目录锚点:#说明#参数#返回#源码
如果$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 | 类型 | 必填 | 说明 |
$data |
(string) |
必需 |
要检查是否已序列化的值。 |
$strict |
(bool) |
可选 |
是否对字符串的结尾严格要求。 |
(bool)如果未序列化则为False,如果为true。
/**
* 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;
}
if ( strlen( $data ) < 4="" )="" {="" return="" false;="" }="" if="" (="" ':'="" !="=" $data[1]="" )="" {="" return="" false;="" }="" if="" (="" $strict="" )="" {="" $lastc="substr(" $data,="" -1="" );="" if="" (="" ';'="" !="=" $lastc="" &&="" '}'="" !="=" $lastc="" )="" {="" return="" false;="" }="" }="" else="" {="" $semicolon="strpos(" $data,="" ';'="" );="" $brace="strpos(" $data,="" '}'="" );="" either="" ;="" or="" }="" must="" exist.="" if="" (="" false="==" $semicolon="" &&="" false="==" $brace="" )="" return="" false;="" but="" neither="" must="" be="" in="" the="" first="" x="" characters.="" if="" (="" false="" !="=" $semicolon="" &&="" $semicolon="">< 3="" )="" return="" false;="" if="" (="" false="" !="=" $brace="" &&="" $brace="">< 4="" )="" return="" false;="" }="" $token="$data[0];" switch="" (="" $token="" )="" {="" case="" 's'="" :="" if="" (="" $strict="" )="" {="" if="" (="" '"'="" !="=" substr(="" $data,="" -2,="" 1="" )="" )="" {="" return="" false;="" }="" }="" elseif="" (="" false="==" strpos(="" $data,="" '"'="" )="" )="" {="" return="" false;="" }="" or="" else="" fall="" through="" case="" 'a'="" :="" case="" 'o'="" :="" return="" (bool)="" preg_match(="" "/^{$token}:[0-9]+:/s",="" $data="" );="" case="" 'b'="" :="" case="" 'i'="" :="" case="" 'd'="" :="" $end="$strict" '$'="" :="" '';="" return="" (bool)="" preg_match(="" "/^{$token}:[0-9.e-]+;$end/",="" $data="" );="" }="" return="" false;="" }="">
更新版本 |
源码位置 |
使用 |
被使用 |
2.0.5 |
wp-includes/functions.php:611 |
5 |
0 |
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