[SOLVED] Get image URL out of string?

[Chevy]

Okay, I have a bbCode function on my site...

 

function bbCode($input){

  $input = strip_tags($input);

    $bbcodes = array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[img=',']');

    $htmlbbcodes = 
array ('<b>','</b>','<i>','</i>','<u>','</u>','<img src="','" />');

  $input = str_replace($bbcodes, $htmlbbcodes, $input);

return $input;

}

 

So I am wondering, if the enter their string which can be like "Blah aha blah IMAGE bla bal blah blah blah"

 

How can I get the image URL out of that and check the size of it in my bbCode function?

 

Thanks a lot!

 

[Chevy]

Any solutions?

[Daniel0]

Is this sort of what you want?

 

<?php
function handle_img_bbcode($matches)
{
$url = $matches[1];
list($width, $height) = getimagesize($url);

return "<img src='{$url}' width='{$width}' height='{$height}' />";
}

$string = "[img=http://www.phpfreaks.com/images/logo_main.jpg]";

$string = preg_replace_callback("`\[img\]([\w]*[:\/\/]*[\w\.\?\/&=\;, \-@%\?]+)\[/img\]`isU", 'handle_img_bbcode', $string);
echo $string;
?>

 

Output:

<img src='http://www.phpfreaks.com/images/logo_main.jpg' width='510' height='94' />

 

I don't see why you'd want to get the height and width for bbcode images. If there are more than a few then it might increase the load time as the server first would have to download the image (and wait until it's done) and then the user would have to download the image as well.

[Chevy]

Well you see I don't want images being over 400px because the images are used on the forums and if they are to big it stretches the boards and stuff...

 

I just want it to display an error if the image height is over 600px and the width is over 450px...

 

But you see I don't know how to get the image from a string...

 

The string could look like this:

 

Hey everyone I just wanted you guys to see my new pic.

[img=imageurl]

So you know, comment me back or something 

 

Does that make it more clear?

[Daniel0]

Yeah, the above code I posted will do that (get the image url+width+height). If there is anything in the code you don't understand feel free to ask

 

Just modify handle_img_bbcode() to throw an error if it's too big.

[Chevy]

Yea I have a question; how would I make it work in this function?

 

function bbCode($input){

  $input = strip_tags($input);

    $bbcodes = array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[img=',']');

    $htmlbbcodes = 
array ('<b>','</b>','<i>','</i>','<u>','</u>','<img src="','" />');

  $input = str_replace($bbcodes, $htmlbbcodes, $input);

return $input;

}

 

[Daniel0]

You could do it like this:

<?php
function handle_img_bbcode($matches)
{
$url = $matches[1];
list($width, $height) = getimagesize($url);

// check if it's too large here...

return "<img src='{$url}' width='{$width}' height='{$height}' />";
}

function bbCode($input)
{
$input = strip_tags($input);

    $bbcodes = array('[b]','[/b]','[i]','[/i]','[u]','[/u]');
$htmlbbcodes = array('<b>','</b>','<i>','</i>','<u>','</u>');

$input = preg_replace_callback("`\[img\]([\w]*[:\/\/]*[\w\.\?\/&=\;, \-@%\?]+)\[/img\]`isU", 'handle_img_bbcode', $input);

$input = str_replace($bbcodes, $htmlbbcodes, $input);
return $input;
}
?>

[Chevy]

So my varible is like this:

 

    $message = bbCode(filter($_POST['message']));

 

It would have to be

 

    $message = handle_img_bbcode(bbCode(filter($_POST['message'])));

 

Correct?

[Daniel0]

No, handle_img_bbcode() is what is a callback function. Basically preg_replace_callback() will pass an array of matches to that function. Take a look at http://php.net/preg_replace_callback for more info.

 

You just need to pass it to the bbCode() function.

[Chevy]

Oh, I see it xD

 

Thanks a ton, I will try it now...

[Chevy]

I did this:

 

function handle_img_bbcode($matches){

$url = $matches[1];

list($width, $height) = getimagesize($url);

 

    if ($width > 450){

              error("Image To Large!", "Your image is over 450 pixels wide.", "");

            }

    if ($height > 600){

              error("Image To Large!", "Your image is over 600 pixels tall.", "");

            }

}

 

And it does not work...

 

I also added: $input = preg_replace_callback("`\[img\]([\w]*[:\/\/]*[\w\.\?\/&=\;, \-@%\?]+)\[/img\]`isU", 'handle_img_bbcode', $input);

 

To my bbCode function.

[Daniel0]

handle_img_bbcode() still needs to return something as that is what the tag will be replaced with. If you add in the return from my original function at the end if handle_img_bbcode() then it should work again.

[Chevy]

Ah, okay

 

Got it to work!

 

Thanks a ton again