How to get PHP warning error messages_PHP Tutorial

/**
* Update illegal characters and send error messages
*
* @author
* @copyright 2009-06-10
*/
error_reporting(E_ERROR | E_WARNING | E_PARSE);
set_error_handler('displayErrorHandler');//自定義錯誤
//調試信息
echo "time:".date("Y-m-d H:i:s")."n";
//數據配置
//公共函數
function displayErrorHandler($error, $error_string, $filename, $line, $symbols)
{
    $error_no_arr = array(1=>'ERROR', 2=>'WARNING', 4=>'PARSE', 8=>'NOTICE', 16=>'CORE_ERROR', 32=>'CORE_WARNING', 64=>'COMPILE_ERROR', 128=>'COMPILE_WARNING', 256=>'USER_ERROR', 512=>'USER_WARNING', 1024=>'USER_NOTICE', 2047=>'ALL', 2048=>'STRICT');
    $msg = sprintf("%s: %s at file %s(%s)", $error_no_arr[$error] ,$error_string, $filename, $line);
    if(in_array($error,array(1,2,4))){      
        echo $msg; echo "n";//調試顯示
        //發送信息
        if($error==1||$error==2) {
            sendBankMsg($error_string); //發送簡訊
            if(strpos($error_string, 'xml_parse(): Bytes:')!==FALSE){
                writeFiltefile($error_string);
            }
        }
    }
}
function hex2bin($hexdata) {
    $bindata = '';
    for($i=0; $i < strlen($hexdata); $i += 2) {
        $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
    }
    return $bindata;
}
function writeFiltefile($error_string)
{
    if(strpos($error_string, 'xml_parse(): Bytes:')===FALSE||strpos($error_string, ' 0x')===FALSE){
        return;
    }          
    //寫入文件
    $filename = 'filtetext.php';
    include($filename);
    $error_string = str_replace('xml_parse(): Bytes:', '', $error_string);
    $error_string = str_replace(' 0x','', $error_string);
    $error_text = hex2bin($error_string);
    $filtetextArr[] = $error_text;
    $tempArr = array_unique($filtetextArr);//去除重復
    $result = implode("','",$tempArr);
    $result = "";
    fileWrite($filename, $result, 'w');  
}
function sendBankMsg($msg)
{
    $timestamp = time();
    $params = "msg=".$msg
             ."&posttime=".$timestamp;  
    $length = strlen($params);
    //创建socket连接
    $domain = "www.admin.com"; //socket域名
    $actionPath = "/action/bank/bankmsg.php"; //文件路徑
    $fp = fsockopen($domain,80);
    //构造post请求的头
    if($fp){
        $header = "POST ".$actionPath." HTTP/1.1rn";
        $header .= "Host:".$domain."rn";
        $header .= "Content-Type: application/x-www-form-urlencodedrn";
        $header .= "Content-Length: ".$length."rn";
        $header .= "Connection: Closernrn";
        //添加post的字符串
        $header .= $params."rn";
        //发送post的数据
        fputs($fp,$header);
        while (!feof($fp)) {
            $line = fgets($fp,1024); //去除请求包的头只显示页面的返回数据
            if ($inheader && ($line == "n" || $line == "rn")) {
                echo $line;
            }
       }
                                           fclose($fp); 🎜> $fp = fopen($fFileName, $fTag);
if (flock($fp, LOCK_EX)) {
fwrite($fp, $fContent);
flock($fp, LOCK_UN) ;
}
fclose($fp);
ignore_user_abort (FALSE);
return;
}
?>





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