//安全过滤输入[jb]
function check_str($string, $isurl = false)
{
$string = preg_replace('/[x00-x08x0Bx0Cx0E-x1F]/','',$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($string);
}
下面是为大家整理的一些过滤函数：
/**
* 安全过滤类-过滤javascript,css,iframes,object等不安全参数 过滤级别高
* Controller中使用方法：$this->controller->fliter_script($value)
* @param string $value 需要过滤的值
* @return string
*/
function fliter_script($value) {
$value = preg_replace("/(javascript:)?on(click|load|key|mouse|error|abort|move|unload|change|dblclick|move|reset|resize|submit)/i","&111n2",$value);
$value = preg_replace("/(.*?)</script>/si","",$value);
$value = preg_replace("/(.*?)</iframe>/si","",$value);
$value = preg_replace ("//iesU", '', $value);
return $value;
}
/**
* 安全过滤类-过滤HTML标签
* Controller中使用方法：$this->controller->fliter_html($value)
* @param string $value 需要过滤的值
* @return string
*/
function fliter_html($value) {
if (function_exists('htmlspecialchars')) return htmlspecialchars($value);
return str_replace(array("&", '"', "'", "<", ">"), array("&", """, "'", "<", ">"), $value);
}
/**
* 安全过滤类-对进入的数据加下划线 防止SQL注入
* Controller中使用方法：$this->controller->fliter_sql($value)
* @param string $value 需要过滤的值
* @return string
*/
function fliter_sql($value) {
$sql = array("select", 'insert', "update", "delete", "'", "/*",
"../", "./", "union", "into", "load_file", "outfile");
$sql_re = array("","","","","","","","","","","","");
return str_replace($sql, $sql_re, $value);
}
/**
* 安全过滤类-通用数据过滤
* Controller中使用方法：$this->controller->fliter_escape($value)
* @param string $value 需要过滤的变量
* @return string|array
*/
function fliter_escape($value) {
if (is_array($value)) {
foreach ($value as $k => $v) {
$value[$k] = self::fliter_str($v);
}
} else {
$value = self::fliter_str($value);
}
return $value;
}
/**
* 安全过滤类-字符串过滤 过滤特殊有危害字符
* Controller中使用方法：$this->controller->fliter_str($value)
