05c05-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 37 行

<?php
// Implement the Toggle Sort
function toggle_sort(&$a) {
    // Prepare some starting values.
    $i = 0;
    $lastindex = count($a) - 1;

    // Continue looping until we reach the last element.
    while ($i < $lastindex) {
        // Compare this value to the next one
        if ($a[$i] <= $a[$i+1]) {
            // It is less than or equal to the next one, therefore
            //  this is the proper order, move on
            $i++;
        } else {
            // It is greater than the next one, swap it
            $tmp = $a[$i];
            $a[$i] = $a[$i+1];
            $a[$i+1] = $tmp;
            // Step back one in our loop in case the value needs to rise
            //  again.  Don't do this at the beginning of the array.:
            if ($i) { $i--; }
        } 
    }
}

// Prepare an array of values:
$values = array(73, 3, 42, 6, 14, 23, 15, 9, 74, 1, 234, 45, 23, 76, 12, 3);

// Sort them:
toggle_sort($values);

// Echo them out in order:
//  1 3 3 6 9 12 14 15 23 23 42 45 73 74 76 234
foreach ($values as $v) { echo "{$v} "; } 
?>