PHP 实现冒泡法排序
冒泡法排序是简单的排序算法，其算法按照从小到大的顺序排列，PHP实现的代码如下：
<?php
/*
* Bubble sort
*
* Date: 2016-09-20
*
* Author: lcy_ltpsr
*
*/
function bubble_sort($num_arr) {
$cnt = count($num_arr);
for($i=0;$i<$cnt-1;$i++) {
for($j=0;$j<$cnt-1-$i;$j++) {
if ($num_arr[$j] > $num_arr[$j+1]) {
$tmp = $num_arr[$j];
$num_arr[$j] = $num_arr[$j+1];
$num_arr[$j+1] = $tmp;
}
}
}
return $num_arr;
}
$num_arr = array(7, 3, 5, 4, 9, 234, 87, 398, 23, 90);
$num_arr_sort = bubble_sort($num_arr);
echo '$num_arr: ' , "\n";
print_r($num_arr);
echo 'Bubble sort $num_arr_sort: ' , "\n";
print_r($num_arr_sort);
?>
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