08c04-1.php

介绍PHP5的给类型函数应用

<?php
// A function that will traverse a directory tree, looking for files
// that match a given regular expression, and returns all files:
function find($regex, $dir) {
    $matches = array();
    
    // Ok, open up the directory and prepare to start looping:
    $d = dir($dir);

    // Loop through all the files:
    while (false !== ($file = $d->read())) {
        // Skip . and .., we don't want to deal with them.
        if (($file == '.') || ($file == '..')) { continue; }

        // If this is a directory, then:
        if (is_dir("{$dir}/{$file}")) {
            // Call this function recursively to look in that subdirectory:
            $submatches = find($regex, "{$dir}/{$file}");
            // Add them to the current match list:
            $matches = array_merge($matches, $submatches);
        } else {
            // It's a file, so check to see if it is a match:
            if (preg_match($regex, $file)) {
                // Add it to our array:
                $matches[] = "{$dir}/{$file}";
            }
        }
    }
    
    // Ok, that's it, return the array now:
    return $matches;
}

// Look for all PHP files on your website, starting with the document root:
$found = find('/\.php$/', $_SERVER['DOCUMENT_ROOT']);

// Sort, then Display them:
sort($found);
echo '<pre>', print_r($found, true), '</pre>';
?>