php中unserialize返回false的解决方法

<?php 
$arr = array( 
  'name' => 'fdipzone', 
  'gender' => 'male' 
); 
 
$str = serialize($arr); //序列化 
echo 'serialize str:'.$str."\r\n\r\n"; 
 
$content = unserialize($str); // 反序列化 
echo "unserialize str:\r\n"; 
var_dump($content); 
?> 

serialize str:a:2:{s:4:"name";s:8:"fdipzone";s:6:"gender";s:4:"male";} 
 
unserialize str: 
array(2) { 
 ["name"]=> 
 string(8) "fdipzone" 
 ["gender"]=> 
 string(4) "male" 
} 

<?php 
$str = 'a:9:{s:4:"time";i:1405306402;s:4:"name";s:6:"新晨";s:5:"url";s:1:"-";s:4:"word";s:1:"-";s:5:"rpage";s:29:"http://.baidu./test.html";s:5:"cpage";s:1:"-";s:2:"ip";s:15:"117.151.180.150";s:7:"ip_city";s:31:"中国北京市 北京市移动";s:4:"miao";s:1:"5";}'; 
var_dump(unserialize($str)); // bool(false) 
?> 

// utf8 
function mb_unserialize($serial_str) { 
  $serial_str= preg_replace('!s:(\d+):"(.?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str ); 
  $serial_str= str_replace("\r", "", $serial_str); 
  return unserialize($serial_str); 
} 
 
// ascii 
function asc_unserialize($serial_str) { 
  $serial_str = preg_replace('!s:(\d+):"(.?)";!se', '"s:".strlen("$2").":\"$2\";"', $serial_str ); 
  $serial_str= str_replace("\r", "", $serial_str); 
  return unserialize($serial_str); 
} 

echo '<meta http-equiv="content-type" content="text/html; charset=utf-8">'; 
 
// utf8 
function mb_unserialize($serial_str) { 
  $serial_str= preg_replace('!s:(\d+):"(.?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str ); 
  $serial_str= str_replace("\r", "", $serial_str); 
  return unserialize($serial_str); 
} 
 
$str = 'a:9:{s:4:"time";i:1405306402;s:4:"name";s:6:"新晨";s:5:"url";s:1:"-";s:4:"word";s:1:"-";s:5:"rpage";s:29:"http://.baidu./test.html";s:5:"cpage";s:1:"-";s:2:"ip";s:15:"117.151.180.150";s:7:"ip_city";s:31:"中国北京市 北京市移动";s:4:"miao";s:1:"5";}'; 
 
var_dump(unserialize($str));  // false 
 
var_dump(mb_unserialize($str)); // 正确 

array(9) { 
 ["time"]=> 
 int(1405306402) 
 ["name"]=> 
 string(6) "新晨" 
 ["url"]=> 
 string(1) "-" 
 ["word"]=> 
 string(1) "-" 
 ["rpage"]=> 
 string(30) "http://.baidu./test.html" 
 ["cpage"]=> 
 string(1) "-" 
 ["ip"]=> 
 string(15) "117.151.180.150" 
 ["ip_city"]=> 
 string(31) "中国北京市 北京市移动" 
 ["miao"]=> 
 string(1) "5" 
}