关于php中foreach循环的有关问题

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Release: 2016-06-13 12:26:17
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关于php中foreach循环的问题

<br />$a ='1=A # 2=B # 3=C # 4=D';<br />$alist = explode(' # ', $a);<br />foreach($alist as $key=>$value){<br />	$arr=explode('=',$value);<br />	$blist[$arr[0]]=$arr[1];<br />	echo "$blist[$key]";<br />}<br />
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echo "$blist[$key]"; 只能输出ABC 每次都缺少最后一个 怎么 才能输出 ABCD
------解决思路----------------------
直接 echo $arr[1]; 不就行了

一定要用$blist输出的话应该写成 echo "$blist[$key+1]"; 因为你的$blist数组索引是从1开始到4
------解决思路----------------------
引用:
$arr[1] 的确能输出 ABCD 可以解决这个问题

那么要输出C 怎么书写? $arr[1[3]] ?貌似不对

Quote: 引用:

key是0-3
而$arr[0]是1-4
所以不同,改成这样就可以了。
<br />$a ='1=A # 2=B # 3=C # 4=D';<br />$alist = explode(' # ', $a);<br />foreach($alist as $key=>$value){<br />    $arr=explode('=',$value);<br />    $blist[$arr[0]-1]=$arr[1];<br />    echo "$blist[$key]";<br />}<br />
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$arr[1]  的确能输出 ABCD 可以解决这个问题 

那么要输出C  怎么书写? $arr[1[3]] ?貌似不对

echo $blist[2];

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