06c01-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 37 行

<?php
// Generate access list:
$access = array('aramsey', 'cdennison', 'hcline', 'rcook', 'rwhite');
$admin = array('ewhite', 'eisenhamer');

// The function to check access.  Pass it a username, and optionally if 
//  you want administrative access only:
function check_access($username, $adminonly = false) {
    global $access, $admin;
    
    // First of all, if they are an admin, always return true:
    if (in_array($username, $admin)) {
        return true;
    }
    
    // If we are allowing non-admins and they are in the list return true
    if (!($adminonly) && in_array($username, $access)) {
        return true;
    }
    
    // Otherwise, they should not have access:
    return false;
}

// Try a couple of test cases, regular access - both are true
echo "<p>'rwhite' ",
    check_access('rwhite') ? 'is' : 'is NOT' ," allowed.</p>";
echo "<p>'eisenhamer' ", 
    check_access('eisenhamer') ? 'is' : 'is NOT' ," allowed.</p>";

// Now for administrative, eisenhamer does, but rwhite does not.
echo "<p>'rwhite' ", 
    check_access('rwhite', true) ? 'is' : 'is NOT' ," an admin.</p>";
echo "<p>'eisenhamer' ", 
    check_access('eisenhamer', true) ? 'is' : 'is NOT' ," an admin.</p>";
?>