PHP中key和current,next的联合运用实例分析
PHP中key和current,next的联合运用实例分析，next实例分析
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'); $arrq['tuca'] = array('sssd'=>'ewqq','shu2'=>'sjkah','saSa'=>'dwjhhaz');
如何在不破坏数组结构的情况下去除$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：
<?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>";
}
?>运行结果为：
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