用户自定义排序数组有关问题
用户自定义排序数组问题
- PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?PHP $number = array(array('tir','tire','100'), array('Oil','oil','50'), array('spk','spark','10')); function compare($x,$y){ if($x[1]==$y[1]){ return 0;} else if($x[1]<$y[1]){ return -1; } else{ return 1;} }usort($number,'compare');print_r($number);?> 那个function函数是什么意思 看不懂 哪些返回值是怎么回事 原理究竟是什么 请高手详细讲解一下 小弟刚学PHP
------解决方案--------------------
我的理解，lz可以参考下我下面的例子，希望对你有所帮助
- PHP code
$number = array( array('tir1','tire2','100'), array('Oil1','oil2','50'), array('spk1','spark2','10') ); function compare($x,$y){ if($x[1]==$y[1]){ return 0; } else if($x[1]';usort($number,'compare');print_r($number);// 函数compare 是比较函数 , 也就是把$number数组值代入compare这个函数中进行比较，根据比较的结果，重新排序这个$number数组的内部值//首先比较的是$x[1]==$y[1]//也就是oil2 跟 tire2 进行比较 ,显然他们的值不一样，于是进行$x[1]
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