PHP多维数据排序(不区分大小字母)

    看个例子：   

 1 <?php 
 2    $test = array();
 3    $test[] = 'ABCD';
 4    $test[] = 'aaaa';
 5    $test[] = 'Bdka';
 6    $test[] = '1EEE';
 7    $test[] = '3666';
 8    $test[] = 'cddd';
 9    
10    sort($test);
11    foreach($test as $a)
12        echo $a.'<br>';
13 ?>

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