<?php
//Array filled with data from external file
$patterns = array('!test!', 'stuff1', 'all!!', '');
 
//Delete empty values in array
$patterns = array_filter($patterns);
 
foreach($patterns as &$item){
       $item = preg_quote($item);
}
 
$pattern = '/(?:-[- ]?| +)(?:'.implode('|', $patterns).')(?:-[- ]?|(?= )|$)/i';
 
 
$clid = "I am the !test! stuff1 all!! string and !test!! not matched";
$clid = trim(preg_replace($pattern, '', $clid));
 
echo $clid;

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