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php正则匹配截取json

时间:2021-07-01 10:21:17 帮助过:91人阅读

请教一个正则截取问题


$script='';

怎么把contacts中间的[{"id":6,"nickname":"yan","remarkname":"","groupid":0},{"id":8,"nickname":"mm","remarkname":"","groupid":0},{"id":4,"nickname":"gg","remarkname":"","groupid":0},{"id":2,"nickname":"sa","remarkname":"","groupid":0}]这段截取出来?

回复内容:

请教一个正则截取问题


$script='';

怎么把contacts中间的[{"id":6,"nickname":"yan","remarkname":"","groupid":0},{"id":8,"nickname":"mm","remarkname":"","groupid":0},{"id":4,"nickname":"gg","remarkname":"","groupid":0},{"id":2,"nickname":"sa","remarkname":"","groupid":0}]这段截取出来?

(?<="contacts"\:\[){.*}(?=\].*\.contacts)

注:PHP里好像需要把"转义一下变成\"
顺便推荐一个正则参考用的网址:http://deerchao.net/tutorials/regex/regex.htm

PHP的DEMO:

preg_match_all("/\[{.*?\}]/is", $script, $matches);
$result = json_decode($matches[0][1]);

这个正则不是最佳方案,不过结果是你想要的就是。

我觉得没必要把中间的截取出来,

  • 很简单的就可以把前后两个script剥离
  • json_encode剩下的字符串
  • 访问你需要的值

------------------ update ------------------

preg_match_all("/(?<=contacts\":)\s*\[\s*\{(.*?)\]/", $script, $matches);
var_dump($matches);

结果:

array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(226) "[{"id":6,"nick_name":"yan","remark_name":"","group_id":0},{"id":8,"nick_name":"mm","remark_name":"","group_id":0},{"id":4,"nick_name":"gg","remark_name":"","group_id":0},{"id":2,"nick_name":"sa","remark_name":"","group_id":0}]"
  }
}

关于那个正则表达式你可以在这个网站中优化:
debuggex

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