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PHP error handling functions - error_reporting()

Description

The error_reporting() function is used to set which PHP errors are reported.

Version:

PHP 4,5

Syntax:

error_reporting(level )

Parameter:

Parameter Description Required / Optional Type
level Specifies the error report level of a script. Values are either bitmask or constants. Considering future compatibility issues, it is recommended that you use constants. Optional integer

Return Values:

Returns the old error_reporting level or the current level when no level parameter is specified.

Example:

<?php
  // Turn off all error reporting
  error_reporting(0);
// Report simple errors
error_reporting(E_ERROR | E_WARNING | E_PARSE);
// Reporting E_NOTICE 
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);
// Report all errors except E_NOTICE
error_reporting(E_ALL ^ E_NOTICE);
// Report all PHP errors 
error_reporting(E_ALL);
// Report all PHP errors
error_reporting(-1);
// Same as error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
?>

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Next: restore_error_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