finding common but not unique values in a string?

twoteas

Whilst I'm fairly okay with relatively simple aspects of php, this has got be defeated.
I have a string that contains, for example, multiple instances of html image code and I would like to break this up into an array, returning just the image filenames. Whilst I've been using various string functions to break up strings previously, there has always been some fairly common text or separators that allow it to work. I'm guessing I need to loop through the string somehow but it's beyond me at the moment.

So, for example:

$string = "<img src='images/directory1/image1.jpg' width = '4' height = '7'/><img src='images/directory2/image2.jpg' width = '6' height = '9'/><img src='images/directory3/image3.jpg' width = '8' height = '11'/>"

As you can see, the directories differ, the dimensions differ and the filenames differ. I would like the array, once populated to read:
=> image1.jpg
=> image2.jpg
=> image3.jpg

Any help would be appreciated!

ixalmida

This works:

function getFilenames($string)
  {
  $i = 0;
  $filenames = array();
  while(strstr($string, ".jpg"))
    {
    // Get position of the end of the filename...
    $fn_end = strpos($string, ".jpg") + 4;
    // Grab the string part containing the first filename...
    $temp_str = substr($string, 0, $fn_end);
    // Reverse search the temp string to find the beginning of the filename...
    $fn_start = strrpos($temp_str, "/") + 1;
    // Add the filename to our array...
    $filenames[$i] = substr($temp_str, $fn_start);
    // Remove the first filename from the original string...
    $string = substr($string, $fn_end);
    $i++;
    }
  return $filenames;
  }

You can test it using this code:

$string = "<img src='images/directory1/image1.jpg' width = '4' height = '7'/><img src='images/directory2/image2.jpg' width = '6' height = '9'/><img src='images/directory3/image3.jpg' width = '8' height = '11'/>";
$str_array = getFilenames($string);

foreach($str_array as $value)
  {
  echo $value."<br>";
  }

twoteas

It just goes to show you can stare at things for waaaaaay too long! As soon as a fresh set of eyes is on the problem, the problem goes away. Thanks a million - it took a bit of tweaking for what I'm doing but was a great solution and a way simpler way than I was trying to do things too.