PHP return Statement

Last update on May 28 2022 12:33:46 (UTC/GMT +8 hours)

Description

PHP return statement immediately terminates the execution of a function when it is called from within that function.

This function is also used to terminate the execution of an eval() function or script file.

If this function is called from a global scope, the function stops the execution of the current script. If the current script file was included using include() or required(), then control goes back to the calling file.

Syntax:

return expression

Where expression is any valid expression. Note that, since the return is not a function but a language construct, using parenthesis is not required.

Return values

Condition	Return value
If called from within a function	Returns the argument of the function.
If the current script file was included using include() or required()	Value given to return().
If no parameter is supplied	NULL is returned.

Example:

Code of p.php

<?php
include("q.php");
echo "p";
?>

Code of q.php

<?php 
echo "q";
return;
?>

View the output of p.php

View the output of q.php

See also

continue, break

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Next: include and require

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