如何将会话内容反序列化成数组

Question

$ar = explode(';', 'd|i:0;u|i:1;');foreach($ar as $v) {
  if($v) {
    list($k, $v) = explode('|', $v.';');
    $p[$k] = unserialize($v);
  }
}
print_r($p);这只是测试例，当值中出现“;”就有问题了

Answer 1

还是这样比较稳妥print_r(foo('d|i:0;u|i:1;'));function foo($s) {
  if(! isset($_SESSION)) {
    @session_start();
  }
  $t = $_SESSION;
  session_decode($s);
  list($t, $_SESSION) = array($_SESSION, $t);
  return $t;
}

Answer 2

我要从数据库里取会话来分析,所以上面的都不切实际
以下是Justin(http://www.phpsalon.com/)帮我写的程序片段:
function my_session_decode($str) {
    $str_len = strlen($str);
    $p = 0;
    $ret = array();
    while ($p < $str_len) {
        $q = $p;
        while ($str[$q] != SESSION_DELIMITER) {
            if (++$q > $str_len) break 2;
        }        if ($str[$p] == SESSION_UNDEF_MARKER) {
            $p++;
            $has_value = false;
        } else {
            $has_value = true;
        }
        $key_len = $q - $p;
        $key = substr($str, $p, $key_len);
        $q++;
        if ($has_value) {
            $type = substr($str, $q, 1);
            $value = @unserialize(substr($str, $q, $str_len));
            if ($value !== FALSE) {
                switch ($type) {
                    case 'i':
                        // integer
                        $q += strlen(strval($value)) + 3;
                        break;
                    case 's':
                        // string
                        $q += strlen(strval(strlen($value))) + 6 + strlen($value);
                        break;
                    case 'a':
                        // array
                        break;
                    case 'b':
                        // boolean
                        break;
                    case 'o':
                        // object
                        break;
                    case 'r':
                        // resource
                        break;
                    case 'd':
                        // double
                        break;
                }
                $ret[$key] = $value;
            }
        
        } else {
            $ret[$key] = '';
        }
        $p = $q;
    }
    return $ret;
}

Answer 3

上了两个define,补上
define('SESSION_DELIMITER', '|');
define('SESSION_UNDEF_MARKER', '!');