PHP

common.php

// Windows
error_log(__FILE__.':'.__LINE__.':['.date("Y-m-d G:i:s",time())."] msg: xxx\n", 3, 'c:/cy'.date("Y-m-d").'.log');

// Linux
file_put_contents('/tmp/cy'.date("Y-m-d").'.log', __FILE__.':'.__LINE__.':'."msg: xxx\n", FILE_APPEND);

// usage: outputTrace2Html(sprintf("post IDs = %s", print_r(array_keys($postIDArray),true)));
function outputTrace2Html($msg,$new=false)
{
    if(!$this->isDebugEnable) return;
    $backtrace = debug_backtrace();
    $lasttrace = $backtrace[0];
    $file = $lasttrace ['file'];
    $line = $lasttrace['line'];
    $time = date('Y-m-d H-i-s', time());
    $os = (DIRECTORY_SEPARATOR=='\\')?"windows":'linux';
    if($os == 'windows') {
        $debug_html = dirname( dirname(__FILE__) ) .'\\'.'debug.html';
    } else if($os == 'linux') {
        $debug_html = dirname( dirname(__FILE__) ) .'//'.'debug.html';
    }
    if($new == true) {
        file_put_contents($debug_html,"$file:$line:$time: $msg<br><br>");
    } else {
        file_put_contents($debug_html,"$file:$line:$time: $msg<br><br>",FILE_APPEND);
    }
}