PHP日志打印

gistfile1.php

function debug_log() {
    if (false) return; //开关
    static $fp = 0;
    if ($fp === 0) {
        $logname = 'myprojectname';//日志名称
        $fp = fopen('/tmp/' . $logname . '.debug.log', 'a');
    } 
    $traces = debug_backtrace();
    $trace = count($traces) > 1 ? $traces[1] : $traces[0];
    $log_msg = date('Y-m-d H:i:s') . ' FILE:' . basename($trace['file']) . ' FUNC:' . $trace['function'] . ' LINE:' . $trace['line'] . ' :' . "\n";
    foreach(func_get_args() as $arg) {
        if (is_string($arg)) {
            $log_msg .= $arg . ' ';
        } else {
            $log_msg .= var_export($arg, true) . ' ';
        }
    }
    fwrite($fp, $log_msg . "\n");
}