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本文实例讲述了php从文件夹随机读取文件的方法。分享给大家供大家参考。具体实现方法如下:
function RandomFile($folder='', $extensions='.*'){ // fix path: $folder = trim($folder); $folder = ($folder == '') "'.$folder.'"'); } if (count($files) == 0){ die('No files where found :-('); } // seed random function: mt_srand((double)microtime()*1000000); // get an random index: $rand = mt_rand(0, count($files)-1); // check again: if (!isset($files[$rand])){ die('Array index was not found! very strange!'); } // return the random file: return $folder . $files[$rand]; } //用法演示: // "jpg|png|gif" matches all files with these extensions print RandomFile('test_images/','jpg|png|gif'); // returns test_07.gif // ".*" matches all extensions (all files) print RandomFile('test_files/','.*'); // returns foobar_1.zip // "[0-9]+" matches all extensions that just // contain numbers (like backup.1, backup.2) print RandomFile('test_files/','[0-9]+'); // returns backup.7
希望本文所述对大家的php程序设计有所帮助。
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