$_GET['variable'] into an Array Variable

Question

Okay, so I have an array named with three values:

$tutorials = array('introduction', 'get_started', 'basics')

I also have a link for example:

mysite.com/?tutorials=get_started

So the link above appears to be the first value of $tutorials but what if I want my anchor's href to be like the next value?

<a href="?tutorials=basics">Next</a>

Are there any shortcuts for this? Because my array is not just only 3 but 20 and I don't want to edit them one by one.

What I'm trying to do here is a Next and Previous links. Please help.

Thank you!

n00dle · Accepted Answer · 2012-05-14 12:21:25Z

1

Something like this should work:

<?php

   $value = $_GET['tutorials']; // get the current

   // find it's position in the array
   $key = array_search( $value, $tutorials );

   if( $key !== false ) {
      if( $key > 0 ) // make sure previous doesn't try to search below 0
          $prev_link = '?tutorials=' . $tutorials[$key-1];

      if( $key < count( $tutorials ) ) // Make sure we dont go beyond the end of the array
          $next_link = '?tutorials=' . $tutorials[$key+1];
   } else {
      // Some logic to handle an invalid key (not in the array)
   }

?>

answered May 14, 2012 at 12:21

n00dle

6,0632 gold badges40 silver badges49 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Juvar Abrera Over a year ago

Yay! Thank you! I just didn't know about array_search. Newbie here.

adrien · Accepted Answer · 2012-05-14 12:44:37Z

1

Retrieve the index of the current item in your array, and add 1 to get the index of the following tutorial.

Don't forget to check if you already are on the latest item of the array.

<?php

$tutorials = array('introduction', 'get_started', 'basics');

$index = array_search($_GET['tutorials'], $tutorials);

if ($index === FALSE) {
    echo 'Current tutorial not found';
} else if ($index < count($tutorials) - 1) {
    echo '<a href="?tutorials=' . $tutorials[$index+1] . '">Next</a>';
} else {
    echo 'You are already on the latest tutorial available';
}

Manual

edited May 14, 2012 at 12:44

answered May 14, 2012 at 12:18

adrien

4,44928 silver badges26 bronze badges

1 Comment

Juvar Abrera Over a year ago

Okay, I get it now. But I think there's a little mistake you have there.

Adam · Accepted Answer · 2012-05-14 12:21:27Z

0

Use array_search() to get the key and add / minus one to the key to get the next / previous link:

$key = array_search($_GET['tutorials'], $tutorials);

answered May 14, 2012 at 12:21

Adam

1,69414 silver badges18 bronze badges

Collectives™ on Stack Overflow

$_GET['variable'] into an Array Variable

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related