PHP: Best way to extract text within parenthesis?

There are a few different ways to extract text within parentheses in PHP, depending on the specific requirements of your use case. One common approach is to use regular expressions to search for and match patterns of text that include parentheses. For example, you could use the preg_match() function to search for a pattern that includes an opening parenthesis, any number of characters, and a closing parenthesis.

The best way to extract text within parenthesis in PHP using preg_match()

<‌?php
$string = "This is a (test) string.";
if (preg_match('/\((.*?)\)/', $string, $matches)) {
    echo $matches[1];
}
?>

Try it Yourself »

This will output: "test"

Another option is to use the strpos() function to find the position of the open and close parenthesis and then use the substr() function to extract the text within it.

The best way to extract text within parenthesis in PHP using strpos()

<‌?php
$string = "This is a (test) string.";
$open = strpos($string, "(");
$close = strpos($string, ")");
if ($open !== false && $close !== false && $close > $open) {
    $text = substr($string, $open + 1, $close - $open - 1);
    echo $text;
}
?>

Try it Yourself »

This will output: "test"

You can also use the explode() function to split the string at the open parenthesis, take the second part, and then split that result at the close parenthesis to grab the text between them.

The best way to extract text within parenthesis in PHP using explode()

<‌?php
$string = "This is a (test) string.";
$parts = explode("(", $string);
$parts = explode(")", $parts[1]);
echo $parts[0];
?>

Try it Yourself »

This will output: "test"