php變量內嵌入變量

php變量內嵌入變量

<?php
$id=$_GET['id'];

$arr = json_decode($fcontents,true);
$link1 = $arr['list'][0]['url'];
$link2 = $arr['list'][1]['url'];
$link=${link.$id};

當id=1時，$link - $link1
當id=2時，$link - $link2

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當然，此代碼有更簡潔的寫法

<?php
$id=$_GET['id'];

$arr = json_decode($fcontents,true);
$link = $arr['list'][$id-1]['url'];
//或者$link = $arr['list'][--$id]['url'];