How to use preg_replace_callback?
php, preg-replace, preg-replace-callback
Solution
Use the following:
$out = preg_replace_callback(
"(\[otsection\](.*?)\[/otsection\])is",
function($m) {
static $id = 0;
$id++;
return "<div class=\"otsection\" id=\"ots".$id."\">".$m[1]."</div>";
},
$in);
In particular, note that I used a `static` variable. This variable persists across calls to the function, meaning that it will be incremented every time the function is called, which happens for each match.
Also, note that I prepended `ots` to the ID. Element IDs should not start with numbers.
For PHP before 5.3:
$out = preg_replace_callback(
"(\[otsection\](.*?)\[/otsection\])is",
create_function('$m','
static $id = 0;
$id++;
return "<div class=\"otsection\" id=\"ots".$id."\">".$m[1]."</div>";
'),
$in);
Problem
I have the following HTML statement ``` [otsection]Wallpapers[/otsection] WALLPAPERS GO HERE [otsection]Videos[/otsection] VIDEOS GO HERE ``` What I am trying to do is replace the [otsection] tags with an html div. The catch is I want to increment the id of the div from 1->2->3, etc.. So for example, the above statement should be translated to ``` <div class="otsection" id="1">Wallpapers</div> WALLPAPERS GO HERE <div class="otsection" id="2">Videos</div> VIDEOS GO HERE ``` As far as I can research, the best way to do this is via a preg_replace_callback to increment the id variable between each replacement. But after 1 hour of working on this, I just cant get it working. Any assistance with this would be much appreciated!