算法

bubble

<?php

/**
 * 冒泡排序
 */
function bubble_sort(array &$ar)
{
    $tmp = 0;
    $count = count($ar);
    for ($i = 0; $i < $count - 1; $i++) {
        for ($j = 0; $j < $count - 1 - $i; $j++) {
            if ($ar[$j] > $ar[$j + 1]) {
                $tmp = $ar[$j];
                $ar[$j] = $ar[$j + 1];
                $ar[$j + 1] = $tmp;
            }
        }
    }
}

$ar = array(21, 34, 3, 32, 82, 55, 89, 50, 37, 5, 64, 35, 9, 70);
bubble_sort($ar);
print_r($ar);