CODEWITHSUNDEEP
phpregexpreg-match-alltext-extraction
stavros.3p
stavros.3p

Reputation: 2324

Extract text from multiple HTML tags

I am trying to make this work but I can't:

$str = "<html>1</html><html>2</html><html>3</html>";
$matches = array(); 
preg_match_all("(?<=<html>)(.*?)(?=</html>)", $str, $matches);

foreach ($matches as $d)
{
   echo $d;
}

What I am doing wrong? The output must be:

123

Upvotes: -1

Views: 693

Answers (2)

Ted Lyngmo
Ted Lyngmo

Reputation: 117298

You need to add delimiters (I've used !) and you can skip the lookaheads/lookbehinds. Just make a capture group around the numbers you want. Nothing else. Then look in the second matches element for the array with the individual values.

Example:

preg_match_all("!<html>(.*?)</html>!", $str, $matches);

foreach ($matches[1] as $d)
{
   echo $d;
}

Upvotes: 0

anubhava
anubhava

Reputation: 785156

This should work for you:

$str = "<html>1</html><html>2</html><html>3</html>";
preg_match_all("~(?<=<html>).*?(?=</html>)~", $str, $matches);

foreach ($matches[0] as $d) {
   echo $d;
}

Output:

123

Changes are:

  • Use missing regex delimiters ~ in preg_match_all function pattern
  • Remove capturing group since you are already using lookahead and lookbehind so entire match can be used in further processing
  • Using $matches[0] in foreach loop instead of $matches
  • There is no need to declare/initialize $matches before preg_match_all call

Upvotes: -1

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