debug_print_backtrace
There is a way to get the error (if any) at specific line.
<?php
function error_get_line($line) {
$err = error_get_last();
if (empty($err)) {
return;
}
$bt = debug_backtrace();
if (($err['file'] == $bt[0]['file']) && ($err['line'] == $line)) {
return $err;
}
}
// example
$str = @vsprintf('%d', 1, 2); // this will produce a warning
// you can leave a comment in between
$err = error_get_line(__LINE__-2);
/* print_r($err); will print
Array
(
[type] => 2
[message] => Wrong parameter count for vsprintf()
[file] => ....
[line] => 16
)
*/
?>
error_get_last
(PHP 5 >= 5.2.0)
error_get_last — Get the last occurred error
Description
array error_get_last
( void
)
Gets information about the last error that occurred.
Return Values
Returns an associative array describing the last error with keys "type",
"message", "file" and "line". If the error has been caused by a PHP
internal function then the "message" begins with its name.
Returns NULL if there hasn't been an error yet.
Examples
Example #1 An error_get_last() example
<?php
echo $a;
print_r(error_get_last());
?>
The above example will output something similar to:
Array
(
[type] => 8
[message] => Undefined variable: a
[file] => C:\WWW\index.php
[line] => 2
)
add a note
User Contributed Notes
error_get_last
drumcast at live dot com
19-Apr-2011 11:57
php at joert dot net
19-Apr-2011 02:36
To simulate this function in a horrid way for php <5.2, you can use something like this.
<?php
if( !function_exists('error_get_last') ) {
set_error_handler(
create_function(
'$errno,$errstr,$errfile,$errline,$errcontext',
'
global $__error_get_last_retval__;
$__error_get_last_retval__ = array(
\'type\' => $errno,
\'message\' => $errstr,
\'file\' => $errfile,
\'line\' => $errline
);
return false;
'
)
);
function error_get_last() {
global $__error_get_last_retval__;
if( !isset($__error_get_last_retval__) ) {
return null;
}
return $__error_get_last_retval__;
}
}
?>
dmgx dot michael at gmail dot com
07-Oct-2010 04:41
If an error handler (see set_error_handler ) successfully handles an error then that error will not be reported by this function.
Skrol29
24-Jul-2010 03:09
Function error_get_last() will return an error information even if the error is hidden because you've used character @, because of the "error_reporting" directive in the php.ini file, or because you've used function error_reporting().
Examples:
<?php
error_reporting(E_ALL ^ E_NOTICE);
$y = $x;
$err = error_get_last();
var_export($err);
?>
Will display: array ( 'type' => 8, 'message' => 'Undefined variable: x', 'file' => 'test.php', 'line' => 4, )
<?php
$y = @$x;
$err = error_get_last();
var_export($err);
?>
Will display: array ( 'type' => 8, 'message' => 'Undefined variable: x', 'file' => 'test.php', 'line' => 4, )
scott at eyefruit dot com
25-Jun-2010 01:47
If you have the need to check whether an error was a fatal error before PHP 5.2 (in my case, within an output buffer handler), you can use the following hack:
<?php
# Check if there was a PHP fatal error.
# Using error_get_last is the "right" way, but it requires PHP 5.2+. The back-up is a hack.
if (function_exists('error_get_last')) {
$lastPHPError = error_get_last();
$phpFatalError = isset($lastPHPError) && $lastPHPError['type'] === E_ERROR;
} else {
$phpFatalError = strstr($output, '<b>Fatal error</b>:') && ! strstr($output, '</html>');
}
?>
This is, of course, language-dependent, so it wouldn't be good in widely-distributed code, but it may help in certain cases (or at least be the base of something that would work).
iant at clickwt dot com
05-Nov-2009 09:13
Beware that registing a shutdown function to catch errors won't work if other shutdown functions throw errors.
<?php
register_shutdown_function('cleanupObjects');
register_shutdown_function('handleFatalPhpError');
function cleanupObjects() {
trigger_error('An insignificant problem', E_USER_WARNING);
}
function handleFatalPhpError() {
$last_error = error_get_last();
if($last_error['type'] === E_ERROR || $last_error['type'] === E_USER_ERROR) {
echo "Can do custom output and/or logging for fatal error here...";
}
}
trigger_error('Something serious', E_USER_ERROR);
?>
In the above code, $last_error will contain the warning, becuase cleanupObjects() is called first.
michael at getsprink dot com
10-Aug-2009 10:15
The error_get_last() function will give you the most recent error even when that error is a Fatal error.
Example Usage:
<?php
register_shutdown_function('handleFatalPhpError');
function handleFatalPhpError() {
$last_error = error_get_last();
if($last_error['type'] === E_ERROR) {
echo "Can do custom output and/or logging for fatal error here...";
}
}
?>
phil at wisb dot net
04-Dec-2008 04:12
While mail at mbaierl dot com makes the point that this function isn't best for reporting the possible error condition of the most recently executed step, there are situations in which it is especially helpful to know the last error—regardless of when it occurred.
As an example, imagine if you had some code that captured the output from dynamic pages, and cached it for faster delivery to subsequent visitors. A final sanity check would be to see if an error has occurred anywhere during the execution of the script. If there has been an error, we probably don't want to cache that page.
Brad
16-Jun-2008 11:54
Like $php_errormsg, the return value of this function may not be updated if a user-defined error handler returns non-FALSE. Tested on PHP 5.2.6.
<?php
var_dump(PHP_VERSION);
// Outputs: string(5) "5.2.6"
@trigger_error("foo");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "foo"
set_error_handler(create_function('$a,$b',''));
@trigger_error("bar");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "foo"
set_error_handler(create_function('$a,$b','return false;'));
@trigger_error("baz");
$e=error_get_last();
var_dump($e['message']);
// Outputs: string(3) "baz"
?>
Brad
16-Jun-2008 11:36
It can't be completely reset, but you can "clear" it well enough for all practical purposes:
<?php
@trigger_error("");
// do stuff...
$e=error_get_last();
if($e['message']!==''){
// An error occurred
}
?>
mail at mbaierl dot com
04-Jun-2008 05:21
This function is pretty useless, as it can not be reset, so there is no way to know if the error really happened on the line before this function call.