CODEWITHSUNDEEP
phpregeximageparsing
Mark
Mark

Reputation: 3859

Is it possible to get image URLs from the start of a string in PHP?

I have an example string as follows

$string = '
http://image.gsfc.nasa.gov/image/image_launch_a5.jpg
http://pierre.chachatelier.fr/programmation/images/mozodojo-original-image.jpg
http://image.gsfc.nasa.gov/image/image_launch_a5.jpg

Alot of text

http://www.google.com/intl/en_ALL/images/logos/images_logo_lg.gif

more text';

I want to be able to extraxt the url's of the first three images (basicly whatever # of images are at the start of the string) but not extract any image URLs once my non image text starts. I can successfully use regex to grab all the image URL, but it also grabs the last google.com image which is inside the text.

Thanks for any ideas!!

Upvotes: 1

Views: 167

Answers (2)

Brad Christie
Brad Christie

Reputation: 101614

How about avoiding regex and using explode instead?

$string = '....';

$urls = array();
$lines = explode(PHP_EOL,$string);
foreach ($lines as $line){
  $line = trim($line);

  // ignore empty lines
  if (strlen($line) === 0) continue;

  $pUrl = parse_url($line);

  // non-valid URLs don't count
  if ($pUrl === false) break;

  // also skip URLs that aren't images
  if (stripos($pUrl['path'],'.jpg') !== (strlen($pUrl['path']) - 4)) break;

  // anything left is a valid URL and an image
  // also, because a non-url fails and we skip empty lines, the first line
  // that isn't an image will break the loop, thus stopping the capture
  $urls[] = $line;
}
var_dump($urls);

Example at IDEOne

Upvotes: 1

manuskc
manuskc

Reputation: 794

Let R be regex to grab an image url

You need to grab (R)+ , i.e 0 or more occurrences of R

or mostly ((R)(w)?)+

Where w represents a regular expression to match white spaces.

Upvotes: 2

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