经典php防注入函数代码
<?php /************************* 说明: 判断传递的变量中是否含有非法字符 如$_post、$_get 功能: 防注入 **************************/ //要过滤的非法字符 这个过滤的字符 还可以增加 $arrfiltrate = array( "'", ";", "union" ); //出错后要跳转的url,不填则默认前一页 $strgourl = ""; //是否存在数组中的值 function funstringexist($strfiltrate, $arrfiltrate) { foreach ($arrfiltrate as $key => $value) { if (eregi($value, $strfiltrate)) { return true; } } return false; } //合并$_post 和 $_get if (function_exists(array_merge)) { $arrpostandget = array_merge($http_post_vars, $http_get_vars); } else { foreach ($http_post_vars as $key => $value) { $arrpostandget[] = $value; } foreach ($http_get_vars as $key => $value) { $arrpostandget[] = $value; } } //验证开始 foreach ($arrpostandget as $key => $value) { if (funstringexist($value, $arrfiltrate)) { echo "<script language="网页特效">alert("非法字符");</script>"; if (emptyempty($strgourl)) { echo "<script language="javascript">history.go(-1);</script>"; } else { echo "<script language="javascript">window.location="".$strgourl."";</script>"; } exit; } }
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