I'm updating my coding and moving away from preg_replace towards the function preg_replace_callback. On the first I used two arrays, which replaced all the matches in a piece of text.
I have setup the following new piece of code, but I am running into some issues:
<?php
$inhoud = " dit is een test versie, waarin [alum] staat [alum] & [fotoalbums] om [intern=test]te[/intern] vervangen<p>";
function parse_callback($match) {
$hit = $match[0];
switch ($hit){
case '[alum]':
return "<a href=\"/linktype1/\">link1</a>";
break;
case '[fotoalbums]':
return "<a href=\"/linktype2/\">link2</a>";
break;
case '[intern]':
return "<a href=\"". $match[1] ."\">$match[2]</a>";
break;
default:
//return "UNKNOWN:$match";
return var_dump($match);
}
}
$Patroon = "'\[intern=(.*?)\](.*?)\\[\/intern\]'";
$Patroon = "'\[fotoalbums\]'";
$Patroon = "'\[alum\]'";
$inhoud = preg_replace_callback($Patroon, parse_callback, $inhoud);
?>
The later two in the $Patroon are no issue, these will be updated, but I'm unable to update the first, as the match being found will be the complete string. The $match will also contain the pieces of text from $inhoud on which is has matched (.*?), but I'm unable to process these in the switch.
Any suggestions on how to resolve this issue or a better approach to the coding. The above example is just a few options which will be matched, the actual list is much larger.
First of all, you should pass the function name as a string: "parse_callback".
As you've noticed, match[0] will return the whole matched text ("[intern=test]te[/intern]"). You could capture the tag name in a group:
$Patroon = "'\[(intern)=(.*?)\](.*?)\[/intern\]'";
(intern)This way, the tag name will be returned by $match[1].
And using this approach to all patterns:
$Patroon = array(
"'\[(intern)=(.*?)\](.*?)\[/intern\]'",
"'\[(fotoalbums|alum)\]'"
);
Code
<?php
$inhoud = " dit is een test versie, waarin [alum] staat [alum] & [fotoalbums] om [intern=test]te[/intern] vervangen<p>";
function parse_callback($match) {
//check the value of the first capture
$hit = $match[1];
switch ($hit){
case 'alum':
return "<a href=\"/linktype1/\">link1</a>";
break;
case 'fotoalbums':
return "<a href=\"/linktype2/\">link2</a>";
break;
case 'intern':
return "<a href=\"$match[2]\">$match[3]</a>";
break;
default:
//return "UNKNOWN:$match";
return var_dump($match);
}
}
$Patroon = array(
"'\[(intern)=(.*?)\](.*?)\[/intern\]'",
"'\[(fotoalbums|alum)\]'"
);
$inhoud = preg_replace_callback($Patroon, "parse_callback", $inhoud);
echo $inhoud;
?>
Output
dit is een test versie, waarin <a href="/linktype1/">link1</a> staat <a href="/linktype1/">link1</a> & <a href="/linktype2/">link2</a> om <a href="test">te</a> vervangen<p>
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