Title: How to implement this handy PHP script
Last modified: August 19, 2016

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# How to implement this handy PHP script

 *  Resolved [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * (@jamesb4551)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/)
 * Hey wordpress breadbins, I have a query. I have found what I hope to be a handy
   script to re-size all images proportionally. Until now I have used css to set
   a max width of 530px and height as auto, but the crazy cats over at moicrowswoft
   developed ie8 which seems to regognise the max width of 530px, but then if any
   image is put in at full size and has rather large dimensions, then it stretches
   the height all the way down to the pixel dimension stated in the post. Yes i 
   could change this in the posts but that would mean going through 1000’s of posts
   to do so. So my question is where would I need to put this script to implement
   it for the entire of my wordpress site?
 * >  <?php
   >  function imageRestrict($image) { $maxwidth = 530; list($width,$height)
   > = getimagesize($image);
   > if ($width > $maxwidth) {
   >  $newheight = $maxwidth/$width * $height; return ‘
   > <img src=”‘.$image.'” width=”‘.$maxwidth.'” height=”‘.$newheight.'”>’; }
   > else{
   >  return ‘<img src=”‘.$image.'” width=”‘.$width.'” height=”‘.$height.'”
   > >’; } } ?>
 * Thanks a lot anyone who replies…

Viewing 7 replies - 1 through 7 (of 7 total)

 *  [Eric Mann](https://wordpress.org/support/users/ericmann/)
 * (@ericmann)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126160)
 * Any php script you want to run on your blog needs to be placed in the functions.
   php file of your theme. Then you can call the function from anywhere else in 
   the theme that you need.
 *  Thread Starter [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * (@jamesb4551)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126323)
 * Thanks ericmann, so I put the above script anywhere in my functions.php then 
   in my template in the page.php i would put
 * >  …
   >  <?php if (have_posts()) : while (have_posts()) : the_post(); ?> <div —>
   > <?php if ( function_exists( ‘imageRestrict’ ) ) ImageRestrict( .$image ); ?
   > > <?php endwhile; ?> </div> …
 * is this correct?
 *  Thread Starter [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * (@jamesb4551)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126331)
 * Anyone? sorry this is kinda urgent….
 *  [Eric Mann](https://wordpress.org/support/users/ericmann/)
 * (@ericmann)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126367)
 * In your loop you’d have:
 *     ```
       <?php if(have_posts()) : while(have_posts()) : the_post(); ?>
       <div>
       ...
       <?php if(function_exists('imageRestrict')) imageRestrict($image); ?>
       ...
       <?php endwhile; ?>
       ...
       </div>
       ...
       ```
   
 * I don’t know why you had a period before $image in your version above. But this*
   should* work just fine.
 *  Thread Starter [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * (@jamesb4551)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126419)
 * Thanks Ericman, I did as you said but it seemed to generate an error and not 
   load my blog, maybe I’m putting it in the wrong place. Would the
 * > <?php if(function_exists(‘imageRestrict’)) imageRestrict($image); ?>
 * need to go in page.php & index.php and that’s it? Also would it matter if it 
   was before any other functions or would it need to be after?
    sorry I’m new to
   PHP completely.
 *  [Eric Mann](https://wordpress.org/support/users/ericmann/)
 * (@ericmann)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126434)
 * That line is correct, and you would put it in several places:
    - To use it on your home page, place it in index.php
    - To use it on individual posts, place it in single.php
    - To use it on individual pages, place it in page.php
 * One thing you need to make sure of first, though, you absolutely **must** define
   the $image variable before passing it to the function. If you don’t it will cause
   an error (which is probably what is happening now). Without seeing your entire
   code, though, I can’t determine what the actual problem is.
 *  Thread Starter [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * (@jamesb4551)
 * [16 years, 9 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126498)
 * In the end I found a ‘see if GD library is working on your server’ php script,
   and turns out even thought they said it was, it wasn’t working for jpgs, which
   this script found out and so I told them to fix it and all is ok now. cheers 
   for your help ericmann.

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘How to implement this handy PHP script’ is closed to new replies.

## Tags

 * [IE8](https://wordpress.org/support/topic-tag/ie8/)
 * [image resize](https://wordpress.org/support/topic-tag/image-resize/)
 * [PHP help](https://wordpress.org/support/topic-tag/php-help/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 7 replies
 * 2 participants
 * Last reply from: [jamesb4551](https://wordpress.org/support/users/jamesb4551/)
 * Last activity: [16 years, 9 months ago](https://wordpress.org/support/topic/how-to-implement-this-handy-php-script/#post-1126498)
 * Status: resolved

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