<?php
 
$text = 'Të$ting slugificatiön';
 
// construct the pipeline
$valuePlaceholder = new stdClass;
$pipeline = array(
    array('preg_replace', array('~[^\\pL\d]+~u', '-', $valuePlaceholder)),
    array('trim', array($valuePlaceholder, '-')),
    array('iconv', array('utf-8', 'us-ascii//TRANSLIT', $valuePlaceholder)),
    // etc etc
);
 
// process it
$value = $text;
foreach ($pipeline as $stage) {
    list($callable, $parameters) = $stage;
    foreach ($parameters as &$parameter) {
        if ($parameter === $valuePlaceholder) {
            $parameter = $value;
        }
    }
    $value = call_user_func_array($callable, $parameters);
}
 
// final result
echo $value;
 
?>

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