Home Backend Development PHP Tutorial PHP数组排序之sort、asort与ksort用法实例_PHP

PHP数组排序之sort、asort与ksort用法实例_PHP

May 31, 2016 pm 07:30 PM
asort ksort php sort sort array

本文实例讲解了PHP数组排序中sort、asort与ksort的用法,供大家参考借鉴之用。具体实例如下所示:

<&#63;php
$arr = array('d'=>'sdf', 'r'=>'sdf', 'a'=> 'eee');
//sort($arr);  // 对数组的值进行重排, 删除之前的键值, 变为索引数组
//asort($arr); // 对数组按照值进行重排,并保持索引关系,索引数组和关联数组均适用
ksort($arr); // 对数组按照键值进行重排,并保持索引关系,索引数组和关联数组均适用

// 对应逆序还有rsort arsort krsort
// 使用函数比较有usort uksort uasort  第二个参数为比较的函数 需要在第一个参数相等 小于 大于第二个参数时 返回 等于 小于 大于 0 的值 浮点数只会取整数部分

print_r($arr);
&#63;>

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本文实例中仅对ksort用法做了示范,感兴趣的读者可以再测试sort与asort的运行结果,以便加深印象,牢固掌握。希望本文实例对大家PHP程序设计有所帮助。

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