PHP二维数组去重实例分析
这篇文章主要介绍了PHP二维数组去重的方法,结合实例形式分析了php数组遍历、判断及去除重复项的相关操作技巧,需要的朋友可以参考下
本文实例分析了PHP二维数组去重的方法。分享给大家供大家参考,具体如下:
都知道一维数组去重用系统函数 array_unique($arr)
然后今天我用到二维数组了,也想去重,百度一大堆,都是将二维转一维 然后使用array_unique($arr)
看得我很恼火,所以决定自己写一个。比他的简单好懂,记录下来,以备后用
header('content-type:text/html;charset=utf8'); $arr = array( array('id'=>1,'psid'=>'P101','fullname'=>'课程计划全称 101','userid'=>4), array('id'=>1,'psid'=>'P101','fullname'=>'课程计划全称 101','userid'=>3), array('id'=>1,'psid'=>'P101','fullname'=>'课程计划全称 101','userid'=>3), array('id'=>1,'psid'=>'P101','fullname'=>'课程计划全称 101','userid'=>2), array('id'=>2,'psid'=>'P102','fullname'=>'新课程计划','userid'=>4), array('id'=>2,'psid'=>'P102','fullname'=>'新课程计划','userid'=>3), array('id'=>2,'psid'=>'P102','fullname'=>'新课程计划','userid'=>3), array('id'=>2,'psid'=>'P102','fullname'=>'新课程计划','userid'=>2) ); $arr = er_array_unique($arr); foreach($arr as $v){ echo 'id: '.$v['id'].'psid: '.$v['psid'].' fullname: '.$v['fullname'].' userid: '.$v['userid'].'<br/>'; } //二维数组简单去重 function er_array_unique($arr){ $newarr = array(); if(is_array($arr)){ foreach($arr as $v){ if(!in_array($v,$newarr,true)){ $newarr[] = $v; } } }else{ return false; } return $newarr; }
打印结果:
id: 1psid: P101 fullname: 课程计划全称 101 userid: 4 id: 1psid: P101 fullname: 课程计划全称 101 userid: 3 id: 1psid: P101 fullname: 课程计划全称 101 userid: 2 id: 2psid: P102 fullname: 新课程计划 userid: 4 id: 2psid: P102 fullname: 新课程计划 userid: 3 id: 2psid: P102 fullname: 新课程计划 userid: 2
注意:此方法中的 in_array($need,$arr,$strict)
在 PHP 版本 4.2.0 之前,$need 不允许是一个数组。$stric 为 true 会严格去匹配 $need 和 $arr 中待查找的类型
更多相关教程请访问 php编程从入门到精通全套视频教程

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