/**
* helper for check with strings
*
* @since 1.6.3
* @param str $string string that is going to be checked
* @return bool true if ad can be displayed
*/
static function helper_check_string($string = '', $options = array())
{
if (!isset($options['operator']) || !isset($options['value']) || '' === $options['value']) {
return true;
}
$operator = $options['operator'];
$value = $options['value'];
// check length of url
if ($operator !== 'regex' && $operator !== 'regex_not') {
if (strlen($value) > strlen($string)) {
return false;
}
}
// check the condition by mode and bool
$condition = true;
switch ($operator) {
// referrer contains string on any position
case 'contain':
$condition = stripos($string, $value) !== false;
break;
// referrer does not contain string on any position
// referrer does not contain string on any position
case 'contain_not':
$condition = stripos($string, $value) === false;
break;
// referrer starts with the string
// referrer starts with the string
case 'start':
$condition = stripos($string, $value) === 0;
break;
// referrer does not start with the string
// referrer does not start with the string
case 'start_not':
$condition = stripos($string, $value) !== 0;
break;
// referrer ends with the string
// referrer ends with the string
case 'end':
// check if string is longer than referrer
$strlen = strlen($string);
$vallen = strlen($value);
$condition = substr_compare($string, $value, $strlen - $vallen, $vallen, true) === 0;
break;
// referrer does not end with the string
// referrer does not end with the string
case 'end_not':
// check if string is longer than referrer
$strlen = strlen($string);
$vallen = strlen($value);
$condition = substr_compare($string, $value, $strlen - $vallen, $vallen, true) !== 0;
break;
// referrer is equal to the string
// referrer is equal to the string
case 'match':
// strings do match, but should not or not match but should
$condition = strcasecmp($value, $string) === 0;
break;
// referrer is not equal to the string
// referrer is not equal to the string
case 'match_not':
// strings do match, but should not or not match but should
$condition = strcasecmp($value, $string) !== 0;
break;
// string is a regular expression
// string is a regular expression
case 'regex':
// check regular expression first
if (@preg_match($value, null) === false) {
Advanced_Ads::log("Advanced Ads: regular expression '{$value}' in visitor condition is broken.");
} else {
$condition = preg_match($value, $string);
}
break;
// string is not a regular expression
// string is not a regular expression
case 'regex_not':
if (@preg_match($value, null) === false) {
Advanced_Ads::log("Advanced Ads: regular expression '{$value}' in visitor condition is broken.");
} else {
$condition = !preg_match($value, $string);
}
break;
}
return $condition;
}
