代码调试--自定义一个简单的debug函数

function debug(){
    $num_args = func_num_args(); //实参个数
    $arg_list = func_get_args(); //返回某一个实参，必须是实参数组的索引；
    for($i=;$i<$num_args;$i++){
        echo "第 $i 个变量的值为：".$arg_list[$i]."<br>";
    }
    echo "当前所处的文件名为：".__FILE__."<br><br>";
}

function writeLog($data, $flag = false)
{
    $date = date("Ymd", time());
    $path = "/home/xxx/debug_logs/log_{$date}.txt";

    if (is_array($data) || is_object($data)) {
        $data = "\n" . print_r($data, );
    }

    $backtrace = debug_backtrace()[];

    $file = str_replace('/home/renxing/git/', '', $backtrace['file']);
    $line = $backtrace['line'];
    $content = date("Y-m-d H:i:s") . "|" . $file . "|" . $line . "|" . $data;
    if ($flag) {
        $content .= "|*****" . json_encode(debug_backtrace(), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES) . "*****|";
    }
    $content .= "\n";
    file_put_contents($path, $content, FILE_APPEND);
}