php preg_match_all numbers in parentheses

问题

I am trying to load a remote website and get all numbers that are inside of parentheses. But what ends up happening is it only matches the last value.

Is my regex wrong? Am I using the correct flags?

I have added the example of what it should match on in the second $html variable.

    //$html = file_get_contents("http://example.com/test.html");

    $html = "(1234) (12) (1)  \r\n  (1346326)";
    preg_match_all("^[(\d)]+$^", $html, $matches, PREG_PATTERN_ORDER);
    print_r($matches);
    echo "<br>";
    foreach ($matches as $val) {
        echo "matched: " . $val[0] . "\n";

    }

Thanks.

回答1:

How about:

preg_match_all("/\((\d+)\)/", $html, $matches, PREG_PATTERN_ORDER); 
print_r($matches[1]);

回答2:

I see two possible issues.

First you are matching from start(^) to end($) it it will only match what fits exactly between start of line and end of line.

Second, you most likely want to use the /gs regex paramter to slurp it all in.

preg_match_all("/\b(\d+)\b/gs" ...

来源：https://stackoverflow.com/questions/11593361/php-preg-match-all-numbers-in-parentheses