How to get string between [ ]

Question

$input="[youtube id=HmV4gXIkP6k]";
preg_match_all("~[(.+?)]~",$input,$output);
var_dump($output);

how to get string inside [ ]?

you need to escape the square brackets with double backslash — trincot, Oct 07 '20 at 16:17
See here: https://stackoverflow.com/questions/10104473/capturing-text-between-square-brackets-in-php — AbsoluteBeginner, Oct 07 '20 at 16:28

score 0 · Answer 1 · answered Oct 07 '20 at 16:21

0

You need to escape the square brackets with a backslash, and as a backslash is also an escape character for PHP string literals, you need to escape the backslash also:

$input="[youtube id=HmV4gXIkP6k]";
preg_match_all("~\\[(.+?)\\]~",$input,$output);
var_dump($output);

Output:

array(2) {
  [0]=>array(1) {
    [0]=>string(24) "[youtube id=HmV4gXIkP6k]"
  }
  [1]=>array(1) {
    [0]=>string(22) "youtube id=HmV4gXIkP6k"
  }
}

answered Oct 07 '20 at 16:21

trincot

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`"~\\[(.+?)\\]~"` and `"~\[(.+?)\]~"` and `"~\[(.+?)]~"` define equal regex patterns in PHP. – Wiktor Stribiżew Oct 07 '20 at 21:31

score 0 · Answer 2 · answered Oct 07 '20 at 16:23

0

You can also do it without regular expressions:

$Index1 = strpos($input, '[');
$Index2 = strpos($input, ']');
$Result = substr($input, $Index1+1, $Index2-$Index1-1);

answered Oct 07 '20 at 16:23

Przemysław Niemiec

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How to get string between [ ]

2 Answers2