复制代码 代码如下:
//安全过滤输入[jb]
function check_str($string, $isurl = false)
{
$string = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F]/','',$string);
$string = str_replace(array(" ","%00","r"),'',$string);
empty($isurl) && $string = preg_replace("/&(?!(#[0-9]+|[a-z]+);)/si",'&',$string);
$string = str_replace(array("%3C",'<'),'<',$string);
$string = str_replace(array("%3E",'>'),'>',$string);
$string = str_replace(array('"',"'","t",' '),array('“','‘',' ',' '),$string);
return trim($string);
}
下面是为大家整理的一些过滤函数：
复制代码 代码如下:
function fliter_script($value) {
$value = preg_replace("/(javascript:)?on(click|load|key|mouse|error|abort|move|unload|change|dblclick|move|reset|resize|submit)/i","&111n\2",$value);
$value = preg_replace("/(.*?)/si","",$value);
$value = preg_replace("/(.*?)/si","",$value);
$value = preg_replace ("//iesU", '', $value);
return $value;
}
function fliter_html($value) {
if (function_exists('htmlspecialchars')) return htmlspecialchars($value);
return str_replace(array("&", '"', "'", "<", ">"), array("&", """, "'", "<", ">"), $value);
}
function fliter_sql($value) {
$sql = array("select", 'insert', "update", "delete", "'", "/*",
"../", "./", "union", "into", "load_file", "outfile");
$sql_re = array("","","","","","","","","","","","");
return str_replace($sql, $sql_re, $value);
}
function fliter_escape($value) {
if (is_array($value)) {
foreach ($value as $k => $v) {
$value[$k] = self::fliter_str($v);
}
} else {
$value = self::fliter_str($value);
}
return $value;
}
function fliter_str($value) {
$badstr = array(" ", "%00", "r", '&', ' ', '"', "'", "<", ">", " ", "%3C", "%3E");
$newstr = array('', '', '', '&', ' ', '"', ''', "<", ">", " ", "<", ">");
$value = str_replace($badstr, $newstr, $value);
$value = preg_replace('/&((#(d{3,5}|x[a-fA-F0-9]{4}));)/', '&\1', $value);
return $value;
}
function filter_dir($fileName) {
$tmpname = strtolower($fileName);
$temp = array(':/'," ", "..");
if (str_replace($temp, '', $tmpname) !== $tmpname) {
return false;
}
return $fileName;
}
public function filter_path($path) {
$path = str_replace(array("'",'#','=','`','$','%','&',';'), '', $path);
return rtrim(preg_replace('/(/){2,}|(\){1,}/', '/', $path), '/');
}
public function filter_phptag($string) {
return str_replace(array(''), array(''), $string);
}
public function str_out($value) {
$badstr = array("<", ">", "%3C", "%3E");
$newstr = array("<", ">", "<", ">");
$value = str_replace($newstr, $badstr, $value);
return stripslashes($value); //下划线
}
