本文是一个php实现的字符串过滤类,可以用来过滤用户的输入数据,感兴趣的同学参考下. 代码如下： <?php abstract class Filter { //filter parent class private $blackstr = array(); private $whitestr = array(); function filtit($str) { //do something } } class LoginFilter extends Filter { //for user login filte username(过滤注册的用户名) function filtit($str) { $this -> blackstr = array( ´/[x7f-xff]/´, //filter chinese include chinese symbol ´/W/´ //filter all english symbol ); return preg_replace($this-
本文是一个php实现的字符串过滤类,可以用来过滤用户的输入数据,感兴趣的同学参考下.
代码如下：
<?php
abstract class Filter { //filter parent class
private $blackstr = array();
private $whitestr = array();
function filtit($str) {
//do something
}
}
class LoginFilter extends Filter { //for user login filte username(过滤注册的用户名)
function filtit($str) {
$this -> blackstr = array(
´/[x7f-xff]/´, //filter chinese include chinese symbol
´/W/´ //filter all english symbol
);
return preg_replace($this->blackstr, ´´, $str);
}
}
class EditorFilter extends Filter { //for article editor filter(过滤在线编辑器内容)
function filtit($str) {
$this -> blackstr = array(
´/&/´,
´/´/´,
´/"/´,
´/</´,
´/>/´,
´/\/´,
´///´,
´/-/´,
´/*/´,
´/ /´
);
$this -> whitestr = array(
´&´,
´'´,
´"´,
´<´,
´>´,
´´,
´/´,
´-´,
´*´,
´ ´
);
return preg_replace($this->blackstr, $this -> whitestr, $str);
}
}
class SQLFilter extends Filter { //for filte sql query string(过滤如查询或其它sql语句)
function filtit($str) {
$this -> blackstr = array(
´/´/´,
´/-/´
);
return preg_replace($this->blackstr, ´´, $str);
}
}
class FileNameFilter extends Filter { //for filte a file name(过滤文件名如下载文件名)
function filtit($str) {
$this -> blackstr = array(
´/[^A-za-z0-9_.]|\|^|[|]/´
);
return preg_replace($this->blackstr, ´´, $str);
}
}
?>
abstract class Filter { //filter parent class
private $blackstr = array();
private $whitestr = array();
function filtit($str) {
//do something
}
}
class LoginFilter extends Filter { //for user login filte username(过滤注册的用户名)
function filtit($str) {
$this -> blackstr = array(
´/[x7f-xff]/´, //filter chinese include chinese symbol
´/W/´ //filter all english symbol
);
return preg_replace($this->blackstr, ´´, $str);
}
}
class EditorFilter extends Filter { //for article editor filter(过滤在线编辑器内容)
function filtit($str) {
$this -> blackstr = array(
´/&/´,
´/´/´,
´/"/´,
´/</´,
´/>/´,
´/\/´,
´///´,
´/-/´,
´/*/´,
´/ /´
);
$this -> whitestr = array(
´&´,
´'´,
´"´,
´<´,
´>´,
´´,
´/´,
´-´,
´*´,
´ ´
);
return preg_replace($this->blackstr, $this -> whitestr, $str);
}
}
class SQLFilter extends Filter { //for filte sql query string(过滤如查询或其它sql语句)
function filtit($str) {
$this -> blackstr = array(
´/´/´,
´/-/´
);
return preg_replace($this->blackstr, ´´, $str);
}
}
class FileNameFilter extends Filter { //for filte a file name(过滤文件名如下载文件名)
function filtit($str) {
$this -> blackstr = array(
´/[^A-za-z0-9_.]|\|^|[|]/´
);
return preg_replace($this->blackstr, ´´, $str);
}
}
?>
使用方法如：
$filter = new FileNameFilter(); //定义实例
$downFile = $filter->filtit($_GET[´fn´]); //调用过滤方法
$downFile = $filter->filtit($_GET[´fn´]); //调用过滤方法
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