need to run function on parts of text string

[wee493]

 

Currently I have a large string of html stored in a variable. Within the html is some images.I'm using preg_replace to find all the images

$content = preg_replace('~'.$site.'(\S+\.(?:jpe?g|png|gif))~i', "$1",$content);

I'm wanting to run a function on every image to cache it locally. So I need to run a function on each string preg_replace picks out. Do even need to be using reg_replace, or should I be using something else? How do i do this?

 

[Alex]

Is there any reason you're actually using preg_replace(), do you want to replace things in a string, or just pick parts out? Perhaps a combination of preg_match_all() and array_map() will work for you. Something like:

 

$content = preg_match_all('~'.$site.'(\S+\.(?:jpe?g|png|gif))~i', $content, $matches);
array_map('some_function', $matches[0]);

[wee493]

Is there any reason you're actually using preg_replace(), do you want to replace things in a string, or just pick parts out? Perhaps a combination of preg_match_all() and array_map() will work for you. Something like:

 

$content = preg_match_all('~'.$site.'(\S+\.(?:jpe?g|png|gif))~i', $content, $matches);
array_map('some_function', $matches[0]);

 

I tried that and wrote some code, but I'm still not exactly how to get it to work. I want to pick out the image src, run a function on it to cache it, then display it as if normally. How do i get it to change the src of the image through my function? I've tried some str_replace and other things with no luck. This is what i have so far

preg_match_all('~'.$site.'(\S+\.(?:jpe?g|png|gif))~i', $content, $matches);
array_map('cache', $matches);		


function cache($matches){
	$img = $matches[0].'<br>';
	echo $img;
	$matches = 'src="http://a3.twimg.com/profile_images/195726221/Kidguru_normal.jpg';
	$matches[0] = $matches;
}

[Alex]

Can you preform print_r($matches) before array_map and post the results please.

[wee493]

Can you preform print_r($matches) before array_map and post the results please.

 

This post has a lot of images...

Array ( [0] => Array ( [0] => src="http://api.tweetmeme.com/imagebutton.gif [1] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swine-flu-shot.jpg [2] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swineflu-graph.jpg [3] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/ilicdc-graph.jpg [4] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swineflu-twitter.jpg ) [1] => Array ( [0] => src="http://api.tweetmeme.com/imagebutton.gif [1] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swine-flu-shot.jpg [2] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swineflu-graph.jpg [3] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/ilicdc-graph.jpg [4] => src="http://cdn.mashable.com/wp-content/uploads/2009/11/swineflu-twitter.jpg ) ) 

 

Also I'm getting

Fatal error: Cannot redeclare cache() (previously declared in /home/kidguru/public_html/thetechworld/functions/remove_unwanted_post_content.php:69) in /home/kidguru/public_html/thetechworld/functions/remove_unwanted_post_content.php on line 72

after the $content has been echo'd

[Alex]

To get rid of the src=" you could just do $img = substr($matches[0], 5), but ideally you should get a better regular expression.

[wee493]

To get rid of the src=" you could just do $img = substr($matches[0], 5), but ideally you should get a better regular expression.

 

I don't necessarily need to do that do I?

 

All I want to do i locate images in a blog post, run a function on the image, update the image location in the post.

 

I would like to be something like

		preg_match_all('~'.$site.'(\S+\.(?:jpe?g|png|gif))~i', $content, $matches);
array_map('cache', $matches);		


function cache($matches){
	$new_location = cache_img($matches[0]);

	$content = str_replace($matches[0], $new_location, $content);
}

function cache_img(){
	// Cache image code //	
}

 

Would it help if you could see it? http://www.thetechworld.org/?user=wee493

[sasa]

look preg_replace_callback() function

[wee493]

look preg_replace_callback() function

I tried that and now i'm getting

Fatal error: Cannot redeclare cache() (previously declared in /home/kidguru/public_html/thetechworld/functions/remove_unwanted_post_content.php:68) in /home/kidguru/public_html/thetechworld/functions/remove_unwanted_post_content.php on line 73

 

And it's still not working