php 去除中括号

显示全部楼层 · 发表于 2014-3-5 01:12:53

怎么去除字符串中的中括号？并且是第一个中括号
例如：
[{"school_id":"203","file_list":[{"file_id":20301,:"http:\/\/www.baidu.com\/school\/20301.jpg","size":3260,"pid":1005},{"file_id":20302,:"http:\/\/www.baidu.com\/school\/20302.jpg","size":1043,"pid":320},{"file_id":20303,:"http:\/\/www.baidu.com\/school\/20303.jpg","size":8294,"pid":256},{"file_id":20304,:"http:\/\/www.baidu.com\/school\/20304.jpg","size":4221,"pid":128}]}]
把最外面的中括号去掉，里面的那个保留。
谢谢

显示全部楼层 · 发表于 2014-3-5 13:01:43

trim(str,']')
trim(str,'[')

trim() 函数从字符串的两端删除空白字符和其他预定义字符

显示全部楼层 · 发表于 2014-3-5 13:48:19

<?php
$str = '[{"school_id":"203","file_list":[{"file_id":20301,"url":"http:\/\/www.baidu.com\/school\/20301.jpg","size":3260,"pid":1005},{"file_id":20302,"url":"http:\/\/www.baidu.com\/school\/20302.jpg","size":1043,"pid":320},{"file_id":20303,"url":"http:\/\/www.baidu.com\/school\/20303.jpg","size":8294,"pid":256},{"file_id":20304,"url":"http:\/\/www.baidu.com\/school\/20304.jpg","size":4221,"pid":128}]}]';
//$str2 = trim($str,'[]');//trim函数
$str2 = substr($str, strlen('['), strlen($str)-(strlen('[')+strlen(']')));//字符串截取
//echo $str2;
$obj = json_decode($str2, true);
//print_r($obj);
foreach($obj['file_list'] as $key => $val){
echo $val['url'].' PID:'.$val['pid'].'<br />';
}

显示全部楼层 · 发表于 2014-3-5 11:43:54

Json 反序列化一下

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