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PHP处理JSON字符串key缺少双引号的解决方法_PHP

WBOY
WBOYOriginal
2016-05-31 19:30:02875browse

本文实例讲述了PHP处理JSON字符串key缺少引号的解决方法,分享给大家供大家参考之用。具体方法如下:

通常来说,JSON字符串是key:value形式的字符串,正常key是由双引号括起来的。

例如:

<&#63;php
$data = array('name'=>'fdipzone');
echo json_encode($data);            // {"name":"fdipzone"}
print_r(json_decode(json_encode($data), true)); //Array ( [name] => fdipzone )
&#63;>

但如果json字符串的key缺少双引括起来,则json_decode会失败。

<&#63;php
$str = '{"name":"fdipzone"}';
var_dump(json_decode($str, true)); // array(1) { ["name"]=> string(8) "fdipzone" }

$str1 = '{name:"fdipzone"}';
var_dump(json_decode($str1, true)); // NULL
&#63;>

解决方法:判断是否存在缺少双引括起来的key,如缺少则先用正则替换为"key",再进行json_decode操作。

<&#63;php
/** 兼容key没有双引括起来的JSON字符串解析
* @param String $str JSON字符串
* @param boolean $mod true:Array,false:Object
* @return Array/Object
*/
function ext_json_decode($str, $mode=false){
  if(preg_match('/\w:/', $str)){
    $str = preg_replace('/(\w+):/is', '"$1":', $str);
  }
  return json_decode($str, $mode);
}

$str = '{"name":"fdipzone"}';
var_dump(ext_json_decode($str, true)); // array(1) { ["name"]=> string(8) "fdipzone" }

$str1 = '{name:"fdipzone"}';
var_dump(ext_json_decode($str1, true)); // array(1) { ["name"]=> string(8) "fdipzone" }
&#63;>

希望本文所述对大家PHP程序设计的学习有所帮助。

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