get number after string php regex

Question

I'm using PHP to parse an e-mail and want to get the number after a specific string: For example, I would want to get the number 033 from from this string:

 Account Number: 033 
 Account Information: Some text here

There is always the word Account Number: and then the number and then a line break. I have:

 preg_match_all('!d+!', $str, $matches);

But that just gets all the numbers...

Any help would be great! Thanks

EDIT:

The text is HTML... that may be the problem:

    <font face="Arial, Helvetica, sans-serif" color="#000099"><strong><font color="#660000">Account 
     Number</font></strong><font color="#660000">: 033<br>
    <strong>Account Name</strong>: More text here<br>

Answer 1

If the number is always after Account Number: (including that space at the end), then just add that to your regex:

preg_match_all('/Account Number: ([d]+)/',$str,$matches);
// The parentheses capture the digits and stores them in $matches[1]

Results:

$matches Array:
(
    [0] => Array
        (
            [0] => Account Number: 033
        )

    [1] => Array
        (
            [0] => 033
        )

)

Note: If there is HTML present, then that can be included in the regex as well as long as you don't believe the HTML is subject to change. Otherwise, I suggest using an HTML DOM Parser to get to the plain-text version of your string and using a regex from there.

With that said, the following is an example that includes the HTML in the regex and provides the same output as above:

// Notice the delimiter 
preg_match_all('@<font face="Arial, Helvetica, sans-serif" color="#000099"><strong><font color="#660000">Account 
Number</font></strong><font color="#660000">: ([d]+)@',$str,$matches);