How can I get string between two characters [string] ? PHP

Question

$string1 = \"This is test [example]\";
$string2 = \"This is test [example][2]\";
$string3 = \"This [is] test [example][3]\";

How can I get the foll

Answer 1

preg_match_all('/\[([^\]]+)\]/', $str, $matches);

php > preg_match_all('/\[([^\]]+)\]/', 'This [is] test [example][3]', $matches);
php > print_r($matches);
Array
(
    [0] => Array
        (
            [0] => [is]
            [1] => [example]
            [2] => [3]
        )

    [1] => Array
        (
            [0] => is
            [1] => example
            [2] => 3
        )

)

And here's the explanation for the rregex:

\[ # literal [
( # group start
    [^\]]+ # one or more non-] characters
) # group end
\] # literal ]