05c05-2.php

介绍PHP5的给类型函数应用

<?php
// Implement the Insertion Sort
function insertion_sort(&$a) {
    // Loop through all entries in the array
    $count = count($a);
    for ($i = 0; $i < $count; $i++) {
        // Save the current value which we are going to compare:
        $value = $a[$i];
        
        // Now loop backwards from the current value until we reach the
        //  beginning of the array or a value less than our current one
        for ($x = $i - 1; ( ($x >= 0) && ($a[$x] > $value) ); $x--) {
            // Swap this value down one place:
            $a[$x + 1] = $a[$x];
        }
        
        // Now assign our value to it's proper sorted position:
        $a[$x + 1] = $value;
    }
}
        
// 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:
insertion_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} "; }
?>