/**
* Parses the specified request source for a parameter which corresponds to the specified param key.
* The param filter type will be utilize to determine which pre-configured regex pattern will be utilized
* to filter the parameter.
* @param array $requestSource The source which the parameter data will be drawn from.
* @param String $paramKey The key which will be used to retrieve the parameter data.
* @param int $paramFilterType The predefined filter type which will be utilized to determine which
* regex filter will be applied to filter the parameter value. If not specified, no filtering will occur.
* @return The retrieved and filtered parameter value, if found. Otherwise NULL.
*/
public static function parseRequestParam(array $requestSource, $paramKey, $paramFilterType = NULL)
{
if ($paramFilterType == NULL) {
if (isset($requestSource[$paramKey])) {
return $requestSource[$paramKey];
} else {
return NULL;
}
}
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_INT) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[0-9]*$/');
} else {
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_ALPHA_NUMERIC) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[a-zA-Z0-9]*$/');
} else {
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_ALPHA_ONLY) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[a-zA-Z]*$/');
} else {
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_ALPHA_WS_ONLY) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[a-zA-Z\\s]*$/');
} else {
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_ALPHA_NUMERIC_WS_ONLY) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[a-zA-Z0-9\\s]*$/');
} else {
if ($paramFilterType == RequestParser::PARAM_FILTER_TYPE_EMAIL_ADDRESS) {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey, '/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}$/');
} else {
return RequestParser::parseRequestParamWithRegex($requestSource, $paramKey);
}
}
}
}
}
}
}
