Help extracting something.

[russelburgraymond]

I have a page that the source code looks similar to this.

 

<div class="middle">				
	<div id="displayimage">
		<a href="http://aserver.com/347398r"><img src="http://aserver.com/images/no_pic.gif" alt="" /></a>
	</div>

 

Now of course this is within a page that is actually around 110 kb and is crammed with image liks, javascript, etc.  What I want to do is load the page remotely and extract that image link. 

 

I tried fopen and several other but if the file does not exist they throw an error.  I then tried preg_match_quote to extract this info but that did not work.  while the div is always the same that image will change every page.

 

What this is for is a script where someone can add their myspace ID and it will get their profile image and show it on my page for them.  Any help would be greatly appreciated.

[russelburgraymond]

Basicall I want to echo a variable and have

http://aserver.com/images/no_pic.gif

display.  Of couse that image will be different.

 

if I can just get this

<a href="http://aserver.com/347398r"><img src="http://aserver.com/images/no_pic.gif" alt="" /></a>

 

to display I will be happy.

[thebadbad]

Regular expressions:

 

<?php
//ini_set('user_agent', 'Mozilla/5.0 (Windows; U; Windows NT 6.0; da; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10');
//$url = 'http://example.com/';
//$html = file_get_contents($url);
$html = '   <div class="middle">            
      <div id="displayimage">
         <a href="http://aserver.com/347398r"><img src="http://aserver.com/images/no_pic.gif" alt="" /></a>
      </div>';
preg_match('~<div id="displayimage">\s*<a[^>]+><img src="([^"]+)~i', $html, $matches);
$link = $matches[1];
?>

Just uncomment the first three lines, insert the real URL and remove the other $html. Then you should be good.

 

[russelburgraymond]

You totally rock.  Thx.  I will give that a try.

[russelburgraymond]

Didn't work. This is what I got.

 

function add($a)
{
ini_set('user_agent', 'Mozilla/5.0 (Windows; U; Windows NT 6.0; da; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10');
$html = file_get_contents($a);
preg_match('~<div id="displayimage">\s*<a[^>]+><img src="([^"]+)~i', $html, $matches);
$link = $matches[1];
echo "$link";
die();
}

All it returns is an empty page.

[.josh]

preg_match('~<div id="displayimage">.*?<img src="([^"]*)~is',$html,$matches);

 

If that doesn't work, try:

 

preg_match('~<div[^>]*id\s?=\s?["\']displayimage["\'][^>]*>.*?<img[^>]*src\s?=\s?["\']([^"\']*)~is',$html,$matches);

 

2nd is not as efficient but gives a bit of breathing room for variation of coding.

[russelburgraymond]

The second one works.  You guys totally rock. This is awesome.

[russelburgraymond]

preg_match('~<div[^>]*id\s?=\s?["\']displayimage["\'][^>]*>.*?<img[^>]*src\s?=\s?["\']([^"\']*)~is',$html,$matches);

 

Can you guys point to where I can find the breakdown of this?  For instance  What does [^'] mean?  etc?  Can't seem to find anything about it in the php manual.

[thebadbad]

Here's a regular expressions reference I often use: http://www.regular-expressions.info/reference.html

[.josh]

[pre]

 

~<div[^>]*id\s?=\s?["\']displayimage["\'][^>]*>.*?<img[^>]*src\s?=\s?["\']([^"\']*)~is

 

~              start of pattern delimiter

<div          literal match

[^>]*          match 0 or more of anything that is not a >

id            literal match

\s?            match 0 or 1 space or tab

=              literal match

\s?            match 0 or 1 space or tab

["\']          match a single or double quote (single quote escaped since it is used to wrap the pattern)

displayimage  literal match

["\']          match a single or double quote (single quote escaped since it is used to wrap the pattern)

[^>]*          match 0 or more of anything that is not a >

>              literal match

.*?            non-greedy match of 0 or more of anything

<img          literal match

[^>]*          match 0 or more of anything that is not a >

src            literal match

\s?            match 0 or 1 space or tab

=              literal match

\s?            match 0 or 1 space or tab

["\']          match a single or double quote (single quote escaped since it is used to wrap the pattern)

(              start of a group/match capture

[^"\']*        match 0 or more of anything that is not a single or double quote

)              end of a group/match capture

~              end of pattern delimiter

i              modifier to make matching case-insensitive

s              modifier to make quantifiers ignore newline character while matching

[/pre]