06c08-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 16 行

<?php
// A function that multiplies together all members of the array its given
function array_multiply(array $a) {
    return array_reduce($a, create_function('$x,$y', 'return $x * $y;'), 1);
}

// First try this, passing an array with a few values:
//  This will return: 1288
$test_array = array(2, 7, 23, 4);
echo '<p>', array_multiply($test_array), '</p>';

// Now try it again, just passing it a scalar value: 2
//  A fatal error will be generated by PHP because of the type mismatch.
echo '<p>', array_multiply(2), '</p>';
?>