debug_print_backtrace
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.
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". 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 Noteserror_get_last
phil at wisb dot net
05-Dec-2008 12:12
05-Dec-2008 12:12
Brad
16-Jun-2008 06:54
16-Jun-2008 06:54
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 06:36
16-Jun-2008 06:36
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 12:21
04-Jun-2008 12:21
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.