I've written a function that replaces certain patterns in a blog. For example when someone types: :) this function replaces it with a smiley emoticon.
However now I'm trying to do something special, but don't know how to accomplish it. I would like to parse a match to another function like so:
$pattern[] = "/\[ourl\](.*?)\[\/ourl\]/i";
$replace[] = "" . getOpenGraph("$1") . "";
$value = preg_replace($pattern, $replace, $value);
If someone uses [ourl]www.cnn.com[/ourl] this function will retrieve the OpenGraph information and return a specific HTML code.
However this does not work because it doesn't parse the $1 to the function.
How can I solve this?
UPDATE:
Based on the hint u_mulder gave me I was able to pull it off
I have created a demonstration to show how to call getOpenGraph() and how the capture groups are passed as arguments without specifying them in the second parameter of preg_replace_callback().
I modified the pattern delimiters so that the slash in the end tag doesn't need to be escaped.
function getOpenGraph($matches){
return strrev($matches[1]); // just reverse the string for effect
}
$input='Leading text [ourl]This is ourl-wrapped text[/ourl] trailing text';
$pattern='~\[ourl\](.*?)\[/ourl\]~i';
$output=preg_replace_callback($pattern,'getOpenGraph',$input);
echo $output;
Output:
Leading text txet depparw-lruo si sihT trailing text
Try this:
<?php
$content = "[ourl]test[/ourl]\n[link]www.example.com[/link]";
$regex = "/\[(.*)\](.*?)\[(\/.*)\]/i";
$result = preg_replace_callback($regex, function($match) {
return getOpenGraph($match[1], $match[2]);
}, $content);
function getOpenGraph($tag, $value) {
return "$tag = $value";
}
echo $result;
