学步园

<?php<br /> if (!get_magic_quotes_gpc()) {<br /> add_slashes($_GET);<br /> add_slashes($_POST);<br /> add_slashes($_COOKIE);<br /> } </p> <p>function add_slashes($string) {<br /> if (is_array($string)) {<br /> foreach ($string as $key => $value) {<br /> $string[$key] = add_slashes($value);<br /> }<br /> } else {<br /> $string = addslashes($string);<br /> }<br /> return $string;<br /> } </p> <p>//php防注入函数,字符过滤函数<br /> //解码<br /> function htmldecode($str)<br /> {<br /> if(empty($str)) return;<br /> if($str=="") return $str;<br /> $str=str_replace("select","select",$str);<br /> $str=str_replace("join","join",$str);<br /> $str=str_replace("union","union",$str);<br /> $str=str_replace("where","where",$str);<br /> $str=str_replace("insert","insert",$str);<br /> $str=str_replace("delete","delete",$str);<br /> $str=str_replace("update","update",$str);<br /> $str=str_replace("like","like",$str);<br /> $str=str_replace("drop","drop",$str);<br /> $str=str_replace("create","create",$str);<br /> $str=str_replace("modify","modify",$str);<br /> $str=str_replace("rename","rename",$str);<br /> $str=str_replace("alter","alter",$str);<br /> $str=str_replace("cas","cast",$str);<br /> $str=str_replace("&","&",$str);<br /> $str=str_replace(">",">",$str);<br /> $str=str_replace("<","<",$str);<br /> $str=str_replace(" ",chr(32),$str);<br /> $str=str_replace(" ",chr(9),$str);<br /> // $str=str_replace("    ",chr(9),$str);<br /> $str=str_replace("&",chr(34),$str);<br /> $str=str_replace("'",chr(39),$str);<br /> $str=str_replace("<br />",chr(13),$str);<br /> $str=str_replace("''","'",$str);<br /> return $str;<br /> }</p> <p> //编码<br /> function htmlencode($str)<br /> {<br /> if(empty($str)) return;<br /> if($str=="") return $str;<br /> $str=trim($str);<br /> $str=str_replace("&","&",$str);<br /> $str=str_replace(">",">",$str);<br /> $str=str_replace("<","<",$str);<br /> $str=str_replace(chr(32)," ",$str);<br /> $str=str_replace(chr(9)," ",$str);<br /> // $str=str_replace(chr(9),"    ",$str);<br /> $str=str_replace(chr(34),"&",$str);<br /> $str=str_replace(chr(39),"'",$str);<br /> $str=str_replace(chr(13),"<br />",$str);<br /> $str=str_replace("'","''",$str);<br /> $str=str_replace("select","select",$str);<br /> $str=str_replace("join","join",$str);<br /> $str=str_replace("union","union",$str);<br /> $str=str_replace("where","where",$str);<br /> $str=str_replace("insert","insert",$str);<br /> $str=str_replace("delete","delete",$str);<br /> $str=str_replace("update","update",$str);<br /> $str=str_replace("like","like",$str);<br /> $str=str_replace("drop","drop",$str);<br /> $str=str_replace("create","create",$str);<br /> $str=str_replace("modify","modify",$str);<br /> $str=str_replace("rename","rename",$str);<br /> $str=str_replace("alter","alter",$str);<br /> $str=str_replace("cast","cas",$str);<br /> return $str;<br /> }<br /> ?>

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