验证邮箱格式 用户名 url 的php正则表达式
用到了php的ereg函数来验证电子邮箱地址,用户名,url地址实例.
把url拆分,代码如下:
- <?
- $url = "http://www.phpfensi.com";
- $www_url = ereg("^(http://www).([[:alnum:]]+).([[:alnum:]]+)", $url, $regs);
- if ($www_url) :
- echo $regs[0];
- print "<br>";
- echo $regs[1];
- print "<br>";
- echo $regs[2];
- print "<br>";
- echo $regs[3];
- endif;
- ?>
验证邮箱地址,代码如下:
- <?php
- $s = 'm@t.ca';
- if (ereg ('([[:alpha:]]+)@([[:alpha:]]+).([[:alpha:]]{2,4})', $s, $matches))
- {
- echo "Regular expression successful. Dumping matchesn";
- var_dump ($matches);
- }
- else
- {
- echo "Regular expression unsuccessful.n";
- }
- ?>
验证邮箱地址实例二,代码如下:
- <?php
- $email="a@a.com";
- $is_com = ereg("(.)(com$)", $email);
- print $is_com;
- ?>
用户名验证,代码如下:
- <?php
- $username = "Test";
- if (ereg("([^a-z])",$username)) echo "Username must be all lowercase!";
- ?>