指定フォルダから任意のファイル名を取得

Get_file_name.php

<?php
class Get_file_name {

	private $dir;
	private $pattern;
	public $match_word;

	function __construct($d, $p) {

		$this->dir = $d;
		$this->pattern = $p;

	}

	private function get_file() {

		if (is_dir($this->dir) && $dh = opendir($this->dir)) {

			while (($file = readdir($dh)) !== false) {

				if($this->check_file($file) === true) {
					break;
				}

			}

			closedir($dh);

		}

	}

	private function check_file($f) {

		preg_match($this->pattern, $f, $matches);

		if (isset($matches[1])) {
			$this->match_word = $matches[1];
			return true;
		}

	}

	public function init() {
		$this->get_file();
		return $this->match_word;
	}

}

$js_file = new Get_file_name("c:\\xampp\\htdocs\\test\\js", "/^function\.min\-([0-9a-z]{32})\.js$/");
echo $js_file->init();