How to mask special characters in snippet parameters

When using snippets with parameters - how do I mask special characters

for instance the German "Ä" (Ä) does not lead to the desired result - how can it be masked ?

[[snippet?&param=`Ä`]]

HI persepolis,

The best bet is to substitute the character in the snippet call (for example |umlaut| for Ä) and then do a string replace on that character inside the snippet. For example:

Hope that helps,
Garry

Good idea - a more general solution is

I wanted to allow special characters in snippets to make it easier to pass HTML. I modified a few lines inside modx/manager/includes/document.parser.class.inc.php:

if (!empty ($currentSnippetParams)) {
//$tempSnippetParams= str_replace("?", "", $currentSnippetParams); // This didn’t allow any params with ’?’. -Samer
$tempSnippetParams = preg_replace(’/\?/’, ’’, $currentSnippetParams, 1); // Only replace the first ’?’. str_replace doesn’t have a limit in PHP for some reason. -Samer
$splitter= "&";
$tempSplitter = ’~!~MODX_SNIPPET_AMP~!~’; // Samer
if (strpos($tempSnippetParams, "&") > 0)
$tempSnippetParams= str_replace("&", "&", $tempSnippetParams);
//$tempSnippetParams = html_entity_decode($tempSnippetParams, ENT_NOQUOTES, $this->config[’etomite_charset’]); //FS#334 and FS#456
// example call: snippet? &param1=blah&param2= 
$tempSnippetParams = preg_replace(’/’.$splitter.’(?!\w+=)/’, "$tempSplitter$1", $tempSnippetParams, -1); // Samer
$tempSnippetParams= split($splitter, $tempSnippetParams);
$snippetParamCount= count($tempSnippetParams);
for ($x= 0; $x < $snippetParamCount; $x++) {
if (strpos($tempSnippetParams[$x], ’=’, 0)) {
if ($parameterTemp= explode("=", $tempSnippetParams[$x], 2)) { // limit added by Samer -- else very BAD if any = in snippet parameters!
//$parameterTemp[1] = htmlentities($parameterTemp[1], ENT_NOQUOTES, $this->config[’etomite_charset’]);
$parameterTemp[1] = str_replace($tempSplitter, $splitter, $parameterTemp[1]);
$fp= strpos($parameterTemp[1], ’`’);
$lp= strrpos($parameterTemp[1], ’`’);
if (!($fp === false && $lp === false))
$parameterTemp[1]= substr($parameterTemp[1], $fp +1, $lp -1);
$parameter[$parameterTemp[0]]= $parameterTemp[1];
}
}
}
}

All previously valid snippet calls still work as expected.