Insert the string output to log file

gistfile1.php

<?php

private function _logfile($logName, $str2log)
{
	$file= sys_get_temp_dir() . '/mydebug-' . date('Y-m-d')  . '.log';
	if (!$handle = fopen($file, 'a')) {
		throw new Exception('Could not open file!');
	}
	$str2log = print_r($str2log, true);
	$olog = print_r("{$logName}: {$str2log}", true) . PHP_EOL;

	if(fwrite ($handle, $olog)===false){
		throw new Exception('Could not write file!');
	}
	fclose($handle);
}