Regex replace to create templating in PHP

Question

I have a string that looks something like this:

{{imagename.jpg|left|The caption for this image. Includes a variety of chars}}
<p>Some text, lots of paragraphs here.</p>
{{anotherimage.jpg|right|Another caption.}}

What I'm trying to do is to parse out the {{}} bits then pass them through a function. What I have so far is:

function template_function($matches) {
    print_r($matches);
}

function parse_images($string) {
    $string = preg_replace_callback('!\{\{([^}])\}\}!', 'template_function', $string);
    return $string;
}

Can someone give me a hand with the regex so that I end up with the matches being run through print_r?

Drahcir · Accepted Answer · 2011-12-17 21:21:05Z

1

function template_function($matches) {
    print_r($matches[1]);
}

function parse_images($string) {
    $string = preg_replace_callback('/\{\{([^}]*)\}\}/', 'template_function', $string);
    return $string;
}

Have also modified print_r($matches[1]); so that the the actual match is printed.

answered Dec 17, 2011 at 21:21

Drahcir

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1 Comment

Rich Bradshaw Over a year ago

So, I missed the bleeding *! I knew that I must be almost there! This is why Stack Overflow is so awesome - just getting someone else to glance at your code is very very useful.

user142162 · Accepted Answer · 2011-12-17 21:16:45Z

1

You missed the * (or, perhaps the +) quantifier. Your original expression would only match a single, non-} character.

$string = preg_replace_callback('!\{\{([^}]*)\}\}!', 'template_function', $string);

answered Dec 17, 2011 at 21:16

user142162

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