php中如何按键的方式对关联数组排序ksort
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<p>关联数组</p>
<pre><code>$arr = array("b"=>"banana","a"=>"apple","d"=>"dog","c"=>"cat");
//按键排序数组
ksort($arr);
print_r($arr);</code></pre>
<p></p>
<p><span style="color:#fe2c24;">按照24个字母，从小到大，数字从小到大，取得单词首字母从小到大（中文下标无法很好排序）</span></p>
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