[Solved] Problem with preg_match

$searchstr

$searchstr = preg_replace('/[^A-Za-z0-9\-]/', '', $searchstr);

fisearchstr

[[!+fi.searchstr]]

&successMessage=`[[!habitats_search? &searchstr=`[[!+fi.searchstr]]`]]`

preg_match("/$searchstr/i", $v)

preg_match("/".$searchstr."/i", $v)

preg_match('@'.$searchstr.'@i', $v)

 

... some code for the list for the autocomplete function ...

$js = "<script>
$(function() {
  var availableTags = ['".implode('\',\'',$result)."'];
  $( '#searchstr' ).autocomplete({
    source: availableTags,
	minLength: 3
  });
});
</script>";
$modx->regClientStartupScript($js);

echo"[[!FormIt?
   &store=`1` 
   &validate=`searchstr:required`
   &successMessage=`[[!habitats_search? &searchstr=`[[!+fi.searchstr]]` &phy=`".$phy."`]]` 
]]

[[!FormItRetriever]]

[[!+fi.validation_error_message:!empty=`
...
`]]

<form action='[[~[[*id]]]]' method='post'>
	<div class='col-lg-12'>
		<div class='input-group custom-search-form'>
			<input type='text' class='form-control' name='searchstr' id='searchstr' value='[[!+fi.searchstr]]'>
			<span class='input-group-btn'>
				<button class='btn btn-default' type='submit'>
              		<span class='glyphicon glyphicon-search'></span>
            	</button>
        	</span>
    	</div><!-- /input-group -->
    </div>
</form>

<br><br><br>

[[!+fi.successMessage]]
";

... some code for the array $result ...

echo "search for: $searchstr<br><br>\n";

echo "var_dump: ";
var_dump($searchstr);
echo "<br><br>\n";

if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $searchstr))
{
    echo "special chars found!<br><br>\n";
}

$searchstr = preg_replace('/[^a-zA-Z0-9_ -]/s', '', $searchstr);

if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $searchstr))
{
    echo "special chars found 2!<br><br>\n";
}

echo "strip done: ";
print($searchstr); 
echo "<br><br>\n";

foreach ($result as $d)
{
  foreach ($d as $v)
  {
	if(preg_match("/$searchstr/i", $v))
	{
	  $f = 1;
    }

  }

  if ($f == 1)
  {
    echo "found : ".$d[2]."<br>\n";
	unset($f);
  } 
}

$output = '';
$output .= "search for: $searchstr<br><br>\n";

return $output;

&successMessage=`[[!habitats_search? &searchstr=`[[!+fi.searchstr]]` &phy=`".$phy."`]]`

&successMessage=`[[!habitats_search? &searchstr=`".$_POST['searchstr']."` &phy=`".$phy."`]]`