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PHP打印调用堆栈信息

时间:2021-07-01 10:21:17 帮助过:5人阅读

在PHP中发生错我,我们使用set_error_handler进行处理,如果发生异常,则使用set_exception_handler,但是在调试中,我们也可以使用

debug_print_backtrace和debug_backtrace进行调用堆栈信息打印

set_error_handler的使用

My ERROR [$errno] $errstr
\n"; echo " Fatal error on line $errline in file $errfile"; echo ", PHP " . PHP_VERSION . " (" . PHP_OS . ")
\n"; echo "Aborting...
\n"; exit(1); break; case E_USER_WARNING: echo "My WARNING [$errno] $errstr
\n"; break; case E_USER_NOTICE: echo "My NOTICE [$errno] $errstr
\n"; break; default: echo "Unknown error type: [$errno] $errstr
\n"; break; } /* Don't execute PHP internal error handler */ return true;}// function to test the error handlingfunction scale_by_log($vect, $scale){ if (!is_numeric($scale) || $scale <= 0) { trigger_error("log(x) for x <= 0 is undefined, you used: scale = $scale", E_USER_ERROR); } if (!is_array($vect)) { trigger_error("Incorrect input vector, array of values expected", E_USER_WARNING); return null; } $temp = array(); foreach($vect as $pos => $value) { if (!is_numeric($value)) { trigger_error("Value at position $pos is not a number, using 0 (zero)", E_USER_NOTICE); $value = 0; } $temp[$pos] = log($scale) * $value; } return $temp;}$old_error_handler = set_error_handler("myErrorHandler");?>

set_exception_handler的使用

getTrace();    foreach ($trace as $key => $stackPoint) {       //返回异常类似,异常描述信息        $trace[$key]['args'] = array_map('gettype', $trace[$key]['args']);    }    // 格式化异常信息    $result = array();    foreach ($trace as $key => $stackPoint) {        $result[] = sprintf(            $traceline,            $key,            $stackPoint['file'],            $stackPoint['line'],            $stackPoint['function'],            implode(', ', $stackPoint['args'])        );    }    // trace always ends with {main}    $result[] = '#' . ++$key . ' {main}';    // write tracelines into main template    $msg = sprintf(        $msg,        get_class($exception),        $exception->getMessage(),        $exception->getFile(),        $exception->getLine(),        implode("\n", $result),        $exception->getFile(),        $exception->getLine()    );    error_log($msg);}?>

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