Returns a Generator representation of file lines that we can then iterator over with foreach

file-line-generator-helper-function.php

if (!function_exists('getFileLines')) {
    /**
     * Returns a Generator representation of file lines that we can then iterator over with foreach 
     *
     * eg:
     * $fileData = getFileLines('path.txt');
     * foreach ($fileData() as $line) {
     * // $line contains current line
     * }
     * 
     * @param string $path
     *
     * @return Closure
     */
    function getFileLines(string $path)
    {
        return function () use ($path) {
            $file = fopen($path), 'r'));

            if (!$file)
                die('file does not exist or cannot be opened');

            while (($line = fgets($file)) !== false) {
                yield preg_replace("/[\n\r]/","",$line); // strip carriage returns and new lines while we're at it
            }

            fclose($file);
        };

    }
}