06c05-1.php

介绍PHP5的给类型函数应用

<?php
// Define a few functions that echo different strings, based upon whether
//  the number is divisible by a certain other number.
$divisible = array(
    1 => create_function('$n', 
        'echo "<p>Of course $n is divisible by 1, everything is!</p>";'),
    2 => create_function('$n',
        'if ($n % 2 == 0) { 
            echo "<p>$n is divisible by 2.  It is even.</p>"; }'),
    3 => create_function('$n',
        'if ($n % 3 == 0) { 
            echo "<p>$n is divisible by 3.</p>"; }'),
    4 => create_function('$n',
        'if ($n % 4 == 0) { 
            echo "<p>$n is divisible by 4.  It is double-even!</p>"; }'),
    5 => create_function('$n',
        'if ($n % 5 == 0) { echo "<p>$n is divisible by 5.  
            It therefore ends in a 0 or a 5.</p>"; }'),
    );

// Now loop through these functions, calling them all on the number 2000
//  They will be true for all cases except for '3'
foreach($divisible as $func) {
    $func(2000);
}
?>