A very good display of PHP error, exception handling class _php tutorial

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Second, the implementation of the Code

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Custom Exception functions
Set_exception_handler (' handle_exception ');

Custom error functions
Set_error_handler (' Handle_error ');

/**
* Exception Handling
*
* @param mixed $exception Exception object
* @author blog.snsgou.com
*/
function Handle_exception ($exception) {
Error::exceptionerror ($exception);
}

/**
* Error Handling
*
* @param string $errNo error code
* @param string $ERRSTR error message
* @param string $errFile error file
* @param string $errLine error line
* @author blog.snsgou.com
*/
function Handle_error ($errNo, $errStr, $errFile, $errLine) {
if ($errNo) {
Error::systemerror ($errStr, False, True, false);
}
}

/**
* System error Handling
*
* @author blog.snsgou.com
*/
Class Error {

public static function Systemerror ($message, $show = True, $save = True, $halt = True) {

List ($showTrace, $logTrace) = self::d ebugbacktrace ();

if ($save) {
$messageSave = ". $message. '
PHP:'. $logTrace;
Self::writeerrorlog ($messageSave);
}

if ($show) {
Self::showerror (' System ', "

$message

", $showTrace, 0);
}

if ($halt) {
Exit ();
} else {
return $message;
}
}

/**
* Code Execution Process backtracking information
*
* @static
* @access Public
*/
public static function Debugbacktrace () {
$skipFunc [] = ' error->debugbacktrace ';

$show = $log = ";
$debugBacktrace = Debug_backtrace ();
Ksort ($debugBacktrace);
foreach ($debugBacktrace as $k = = $error) {
if (!isset ($error [' File '])} {
Use the reflection API to get the number of files and rows where the method/function resides
try {
if (Isset ($error [' class ')]) {
$reflection = new Reflectionmethod ($error [' class '], $error [' function ']);
} else {
$reflection = new Reflectionfunction ($error [' function ']);
}
$error [' file '] = $reflection->getfilename ();
$error [' line '] = $reflection->getstartline ();
} catch (Exception $e) {
Continue
}
}

$file = Str_replace (Site_path, "', $error [' file ']);
$func = Isset ($error [' class '])? $error [' class ']: ';
$func. = Isset ($error [' type '])? $error [' type ']: ';
$func. = Isset ($error [' function '])? $error [' function ']: ';
if (In_array ($func, $skipFunc)) {
Break
}
$error [' line '] = sprintf ('%04d ', $error [' line ']);

$show. = '

[Line: '. $error [' line ']. ']' . $file. ' ('. $func. ')

';
$log. =!empty ($log)? ', ': ';
$log. = $file. ':' . $error [' line '];
}
Return Array ($show, $log);
}

/**
* Exception Handling
*
* @static
* @access Public
* @param mixed $exception
*/
public static function Exceptionerror ($exception) {
if ($exception instanceof dbexception) {
$type = ' db ';
} else {
$type = ' System ';
}
if ($type = = ' db ') {
$ERRORMSG = ' ('. $exception->getcode (). ') ';
$errorMsg. = Self::sqlclear ($exception->getmessage (), $exception->getdbconfig ());
if ($exception->getsql ()) {
$errorMsg. = ';
$errorMsg. = Self::sqlclear ($exception->getsql (), $exception->getdbconfig ());
$errorMsg. = ';
}
} else {
$ERRORMSG = $exception->getmessage ();
}
$trace = $exception->gettrace ();
Krsort ($trace);
$trace [] = Array (' file ' = = $exception->getfile (), ' line ' = + $exception->getline (), ' function ' = ' break ') ;
$PHPMSG = Array ();
foreach ($trace as $error) {
if (!empty ($error [' function ')]) {
$fun = ";
if (!empty ($error [' class ')]) {
$fun. = $error [' class ']. $error [' type '];
}
$fun. = $error [' function ']. '(';
if (!empty ($error [' args '])) {
$mark = ";
foreach ($error [' args '] as $arg) {
$fun. = $mark;
if (Is_array ($arg)) {
$fun. = ' Array ';
} elseif (Is_bool ($arg)) {
$fun. = $arg? ' True ': ' false ';
} elseif (Is_int ($arg)) {
$fun. = (defined (' Site_debug ') && site_debug)? $arg: '%d ';
} elseif (Is_float ($arg)) {
$fun. = (defined (' Site_debug ') && site_debug)? $arg: '%f ';
} else {
$fun. = (defined (' Site_debug ') && site_debug)? '\'' . Htmlspecialchars (substr (Self::clear ($arg), 0, 10)). (strlen ($arg) > 10? ' ...' : '') . ' \ ': '%s ';
}
$mark = ', ';
}
}
$fun. = ') ';
$error [' function '] = $fun;
}
if (!isset ($error [' line ')]) {
Continue
}
$PHPMSG [] = Array (' file ' = + str_replace (Array (site_path, ' \ \ '), Array (', '/'), $error [' file ']), ' line ' = = $error [' Line '], ' function ' = $error [' function ']);
}
Self::showerror ($type, $ERRORMSG, $PHPMSG);
Exit ();
}

/**
* Log error logs
*
* @static
* @access Public
* @param string $message
*/
public static function Writeerrorlog ($message) {

return false; Temporarily do not write

$message = Self::clear ($message);
$time = time ();
$file = Log_path. '/' . Date (' Y.M.D '). ' _errorlog.php ';
$hash = MD5 ($message);

$userId = 0;
$ip = Get_client_ip ();

$user = 'User: userid= '. Intval ($userId). '; Ip= '. $ip. '; RIP: '. $_server[' REMOTE_ADDR '];
$uri = ' Request: '. Htmlspecialchars (Self::clear ($_server[' Request_uri '));
$message = " \t{$time}\t$message\t$hash\t$user $uri \ n";

Determine if the $message has been recorded within the time interval $maxtime, there is no need to record
if (Is_file ($file)) {
$fp = @fopen ($file, ' RB ');
$lastlen = 50000; Reads the last $lastlen length byte content
$maxtime = 60 * 10; Time interval: 10 minutes
$offset = FileSize ($file)-$lastlen;
if ($offset > 0) {
Fseek ($fp, $offset);
}
if ($data = Fread ($fp, $lastlen)) {
$array = explode ("\ n", $data);
if (Is_array ($array))
foreach ($array as $key = = $val) {
$row = explode ("\ t", $val);
if ($row [0]! = " ) {
Continue
}
if ($row [3] = = $hash && ($row [1] > $time-$maxtime)) {
Return
}
}
}
}

Error_log ($message, 3, $file);
}

/**
* Clear Text part characters
*
* @param string $message
*/
public static function Clear ($message) {
return Str_replace (Array ("\ t", "\ r", "\ n"), "", $message);
}

/**
* SQL statement character cleanup
*
* @static
* @access Public
* @param string $message
* @param string $dbConfig
*/
public static function Sqlclear ($message, $dbConfig) {
$message = Self::clear ($message);
if (! ( Defined (' Site_debug ') && Site_debug)) {
$message = Str_replace ($dbConfig [' Database '], ' * * * ', $message);
$message = Str_replace ($dbConfig [' prefix '], ' * * * ', $message);
$message = Str_replace (C (' Db_prefix '), ' * * * ', $message);
}
$message = Htmlspecialchars ($message);
return $message;
}

/**
* Error displayed
*
* @static
* @access Public
* @param string $type error type Db,system
* @param string $ERRORMSG
* @param string $PHPMSG
*/
public static function ShowError ($type, $errorMsg, $PHPMSG = ") {
Global $_g;

$ERRORMSG = Str_replace (Site_path, ", $ERRORMSG);
Ob_end_clean ();
$host = $_server[' http_host ');
$title = $type = = ' db '? ' Database ': ' System ';
Echo <<


<title>$host-$title Error</title>

$title Error

$errorMsg
EOT;
if (!empty ($PHPMSG)) {
Echo ';
Echo '

PHP Debug

';
Echo '














'; if (Is_array ($PHPMSG)) {echo ' '; foreach ($phpMsg as $k = + $msg) {$k + +; Echo ' '; Echo ' '; Echo ' '; Echo ' '; Echo ' '; Echo ' '; }} else {echo ' '; } Echo '

No.	File	Line	Code
' . $k. '	' . $msg [' file ']. '	' . $msg [' line ']. '	' . $msg [' function ']. '
' . $PHPMSG. '

';
}
Echo <<


EOT;
Exit ();
}
}

/**
* DB Exception class
*
* @author blog.snsgou.com
*/
Class Dbexception extends Exception {

protected $sql;
protected $dbConfig; Current Database configuration information

Public function __construct ($message, $code = 0, $sql = ", $dbConfig = Array ()) {
$this->sql = $sql;
$this->dbconfig = $dbConfig;
Parent::__construct ($message, $code);
}

Public Function GetSQL () {
return $this->sql;
}

Public Function Getdbconfig () {
return $this->dbconfig;
}
}

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