Home Backend Development PHP Tutorial PHP中key和current,next的联合运用实例分析_PHP

PHP中key和current,next的联合运用实例分析_PHP

May 27, 2016 am 10:35 AM
current key next php

本文实例讲述了PHP中key和current,next的联合运用方法。分享给大家供大家参考,具体如下:

问题:

$arrq = array();
$arrq['tuc'] = array('sss'=>'ewq','shu'=>'sjkah','saa'=>'dwjhaz');
$arrq['tucs'] = array('ssss'=>'ewsq','sQhu'=>dwjhaz','sa12a'=>'dwjQhaz');
$arrq['tuca'] = array('sssd'=>'ewqq','shu2'=>'sjkah','saSa'=>'dwjhhaz');

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如何在不破坏数组结构的情况下去除$arrq数组中的重复的值?

思路:先将第一个二维数组中的元素用array_unique函数输出。
输出第二个二维数组中的元素时,自己先用array_unique处理,再去掉在第一个二维数组中已经存在的元素。
输出第三个时,自己先用array_unique处理,再去掉在第一个和第二个二维数组合集中已经存在的元素。
以此类推。

总之,自己先要array_unqiue去重,再去掉自身中在前面所在数组元素合集中存在的元素。

以下为代码:

<&#63;php
$arrq = array();
$arrq['tuc'] = array('sss'=>'ewq','shu'=>'sjkah','saa'=>'dwjhaz');
$arrq['tucs'] = array('ssss'=>'ewsq','sQhu'=>'dwjhaz','sa12a'=>'dwjQhaz');
$arrq['tuca'] = array('sssd'=>'ewqq','shu2'=>'sjkah','saSa'=>'dwjhhaz');
$last=array(); //设置一个空的用来比较的数组
while($arr=current($arrq)) {
  //echo key($arrq);
  $tmp=array_unique($arr); //先清除每个一维数组自身相同的值
  if(count($last)==0) {
    $last=array_merge($last,$arr); //将已经去重的前面的数组合并
  }
  else { // 对其余一维数组进行输出
    //echo key($arrq);
    foreach($arr as $ke=>$va) {
      if(in_array($arr[$ke], $last)) //如果已经存在的元素
      unset($arrq[key($arrq)][$ke]); //删除,此处取得数组元素的KEY值是关键
    }
    $last=array_merge($last,$arr); //将$last变为前面数组的合集,用来进行下次比较
  }
  next($arrq); //指针向后移,这样才能用key函数取得不同的$arrq的下标
}
//以下输出处理后的数组
foreach($arrq as $arr) {
  foreach($arr as $val) {
    echo $val." ";
  }
  echo "<br>";
}
&#63;>

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运行结果为:

更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

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