以下是收集的一些大家经常用到的正则表达式整理，方便日后在工作中参考，特此记录一下。
只能输入数字："^[0-9]*$"
只能输入 n 位的数字："^\d{n}$"
只能输入至少 n 位的数字："^\d{n,}$"
只能输入 m ～ n 位的数字："^\d{m,n}$"
只能输入零和非零开头的数字："^(0[1-9][0-9]*)$"
只能输入有两位小数的正实数："^[0-9]+(.[0-9]{2})?$"
只能输入有 1～3 位小数的正实数："^[0-9]+(.[0-9]{1,3})?$"
只能输入非零的正整数："^\+?[1-9][0-9]*$"
只能输入非零的负整数："^\-[1-9][0-9]*$"
只能输入长度位 3 的字符："^.{3}$"
只能输入由 26 个英文字母组成的字符串："^[A-Za-z]+$"
只能输入由 26 个大写英文字母组成的字符串："^[A-Z]+$"
只能输入由 26 个小写英文字母组成的字符串："^[a-z]+$"
只能输入由数字和 26 个英文字母组成的字符串："^[A-Za-z0-9]+$"
只能输入由数字、26个英文字母或者下划线组成的字符串："^\w+$"
验证用户密码： "^[a-zA-Z]\w{5,17}$" 正确格式位：以字母开头，长度在6～18之间，只能包含字符、数字和下划线
验证是否含有非法字符 ^(?:[\u4e00-\u9fa5]*\w*\s*)+$
只能输入汉字："^[\u4e00-\u9fa5]{0,}$"
验证 Email 地址："^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$"
验证 InternetURL："^http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?$"
中国电话号码验证
匹配形式如:0511-4405222 或者021-87888822 或者 021-44055520-555 或者 (0511)4405222
正则表达式 "((d{3,4})d{3,4}-)?d{7,8}(-d{3})*"
中国邮政编码验证
匹配形式如:215421
正则表达式 "d{6}"
电子邮件验证
匹配形式如:justali@justdn.com
正则表达式 "w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*"
身份证验证
匹配形式如:15位或者18位身份证
正则表达式 "d{18}d{15}"
常用数字验证
正则表达式
"d{n}" n为规定长度
"d{n,m}" n到m的长度范围
非法字符验证
匹配排除非法字符的字符如:
正则表达式 ^(?:[\u4e00-\u9fa5]*\w*\s*)+$
日期验证
匹配形式如:20030718,030718
范围:1900--2099
正则表达式((((19){1}(20){1})d{2})d{2})[01]{1}d{1}[0-3]{1}d{1}
使用实例：
查看代码打印
01
<html>
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<head>
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<title>php正则表达式集锦实例</title>
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<script language="javascript" type="text/javascript">
05
function Button1_onclick(){
06
if(!test_hanzi(document.form1.Text1.value)){
07
alert("姓名只能是汉字");
08
return false;
09
}
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return true;
11
}
12
//验证电子邮件
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function test_email(strEmail){
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var myReg = /^[_a-z0-9]+@([_a-z0-9]+\.)+[a-z0-9]{2,3}$/;
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if(myReg.test(strEmail)) return true;
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return false;
17
}
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//只能输入数字
19
function test_shuzi(strshuzi){
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var myReg =/^[0-9]*$/;
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if(myReg.test(strshuzi)) return true;
22
return false;
23
}
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//只能输入汉字
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function test_hanzi(strhanzi){
26
var myReg =/^[\u4e00-\u9fa5]{0,}$/;
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if(myReg.test(strhanzi)) return true;
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return false;
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}
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</script>
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</head>
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<body>
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<form name="form1">姓名:
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<input id="Text1" name="Text1" type="text" /> <span style="font-family: Arial, Helvetica, sans-serif;">（PS：^_^不错的php开发交流群：304224365，验证：csl）</span>
35
<input name="按钮" type="button" id="Button1" onclick="return Button1_onclick()" value="button" language="javascript" />
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</form>
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</body>
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</html>
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