PHP PCRE语法[关闭]

Question

I'm a newbie with PCRE in PHP. I'm trying to make a very basic shortcode function that could make something with a format like this one: {somealphanumericthing}

In essence I need a preg_match_all() that could find in my post these type of occurrences. I tried something like this:

$shortcode = preg_match_all('/^\b\{[a-zA-Z0-9_]+(\}\b)$/', $body, $found);
    var_dump($shortcode);
    if($shortcode==1) {
        for($i=0;$i<count($found);$i++) {
            print_r($found);
                        //do something nice
        }
    }

But unfortunately it's not working: I get int 0 to the test string {test}

Answer 1

A few things about the regular expression:

• You don't need your line anchors since you are searching in a larger string.
• There's not need to capture the closing }
• Optimization, use the character class \w

Condensed:

/\b\{[a-zA-Z0-9_]+\}\b/