Open all files in a directory and read a line.

<?php

    function readLine($lineNumber, $fileName) {
        /**
         * @param int $lineNumber The line number you want to read from the file.
         * @param string $fileName The string representing the file you wish to open.
         *
         * @return string The contents of the line in the file.
         */
        $file = file($fileName);
        return $file[$lineNumber-1];
    }
    function readLineFrom($lineNumber, $fileNames) {
        /**
         * @param int $lineNumber The line number you want to read from the file.
         * @param string|array $files Either a string for the file you want to open, or an array of filenames.
         *
         * @return array An associative array of the filename to the contents of the line.
         */
        $lines = array();
        if(is_array($fileNames)) {
            foreach($fileNames as $fileName) {
                $lines[$fileName] = readLine($lineNumber,$fileName);
            }
        } else {
            $lines[$fileNames] = readLine($fileNames);
        }

        return $lines;
    }

    function getFileNamesFromDirectory($directory = '.') {
        /**
         * @param string $directory The path to directory you'd like to get filenames from. Defaults to current directory.
         *
         * @return array An array of filenames.  Empty if there are no files.
         */
        $fileNames = array();
        if ($handle = opendir($directory)) {
            while (false !== ($file = readdir($handle))) {
                if ($file != "." && $file != "..") {
                    $fileNames[] = $file;
                }
            }
            closedir($handle);
        }
        return $fileNames;
    }
    echo "<pre>";
    print_r(
        readLineFrom(5, getFileNamesFromDirectory('/var/www/'))
    );
    echo "</pre>";
?>