PHP Exercises : Redirect a user to a different page

Last update on May 30 2022 11:50:14 (UTC/GMT +8 hours)

PHP : Exercise-11 with Solution

Write a PHP script to redirect a user to a different page.

Sample Solution: -

PHP Code:

<?php
header('Location: https://www.w3resource.com/');
?>

Sample Output:

View the output in the browser

header() function:

Syntax:

void header ( string $header [, bool $replace = TRUE [, int $http_response_code ]] )

header() is used to send a raw HTTP header.

Parameters:

header: The header string.
replace: The optional replace parameter indicates whether the header should replace a previous similar header, or add a second header of the same type.
http_response_code: Forces the HTTP response code to the specified value. Note that this parameter only has an effect if the header is not empty.

Flowchart:

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Previous: Write a PHP script, to check whether the page is called from 'https' or 'http'.
Next: Write a simple PHP program to check that emails are valid.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

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