[PHP]将回调函数作用到给定数组的单元上

<span>function</span> fun(<span>$n</span><span>)
{
    </span><span>return</span> <span>$n</span> * <span>$n</span> * <span>$n</span><span>;
}

</span><span>$a</span> = <span>array</span>(1, 2, 3, 4, 5<span>);
</span><span>$b</span> = <span>array_map</span>('fun', <span>$a</span><span>); /* 每个数组单元作三次方运算，返回数组 */
</span><span>print_r</span>(<span>$b</span>);<br>/*<br>Array

(
    [0] => 1
    [1] => 8
    [2] => 27
    [3] => 64
    [4] => 125
)<br>*/

<span>array_map</span>('unlink', <span>glob</span>('*.txt'));<em>/* glob返回"文件名.txt"组成的数组，然后对每个文件进行删除操作*/<br><br></em>

array_map('unlink', glob('*.*'));<br><br>array_map('unlink', glob('*'));