PHP error handling functions - restore_error_handler()
Description
After changing the error handler using set_error_handler(), restore_error_handler() function is used to get the previous error handler back.
Version:
PHP 4.0.1,5
Syntax:
restore_error_handler(void)
Parameter:
None.
Return Values:
This function always returns TRUE.
Example:
<?php
function err_log($error_no, $error_string)
{
$filename = '/log/php_errors.log';
if(filesize($file) > 2048)
{
rename($file, $file . (string) time( ));
clearstatcache( );
}
error_log($error_string, 3, $filename);
}
set_error_handler('err_log');>
for($i = 0; $i < 2500; $i++)
{
trigger_error(time( ) . ": This is an error.\n");
}
restore_error_handler( );
?>
Previous: error_reporting()
Next: restore_exception_handler()
PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can use an anonymous function:
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
And finally with PHP 7 you can use the spaceship operator:
usort($myArray, function($a, $b) { return $a['order'] <=> $b['order']; });
To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.
usort($myArray, function($a, $b) { $retval = $a['order'] <=> $b['order']; if ($retval == 0) { $retval = $a['suborder'] <=> $b['suborder']; if ($retval == 0) { $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder']; } } return $retval; });
If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual
Ref : https://bit.ly/3i77vCC
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