用JS过滤SQL防注入字符
<head>
<title>标题页</title>
<script LANGUAGE="JavaScript">
function check(inputStr) {
if (typeof(inputStr) != "string") { return inputStr; } //判断是否是字符串类型
var tmpValue = inputStr;
//以下搜索字符串中的特殊字符，如果存在，则替换成""
while (tmpValue.indexOf(';') > -1) {tmpValue = tmpValue.replace(';',''); }
while (tmpValue.indexOf('<') > -1) {tmpValue = tmpValue.replace('<',''); }
while (tmpValue.indexOf('>') > -1) {tmpValue = tmpValue.replace('>',''); }
while (tmpValue.indexOf('--') > -1) {tmpValue = tmpValue.replace('--',''); }
while (tmpValue.indexOf(",") > -1) {tmpValue = tmpValue.replace(",",""); }
while (tmpValue.indexOf("'") > -1) {tmpValue = tmpValue.replace("'",""); }
while (tmpValue.indexOf("?") > -1) {tmpValue = tmpValue.replace("?",""); }
document.getElementById("txt1").value = tmpValue; //重新显示更改后的变量
}
</script>
</head>
<body>
<input type=text id="txt1" value="select * from userinfo where username=zhang' and passwrod=2" style="width: 392px">
<input type=button value="提交" onClick="check(txt1.value)">
</body>
</html>
返回
