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php ereg()邮箱验证与文件名验证

Jun 13, 2016 am 10:03 AM
php and string Tutorial file name Comparison parse grammar Mail verify

php教程 ereg()邮箱验证与文件名验证
字符串比对解析。

语法: int ereg(string pattern, string string, array [regs]);

返回值: 整数/数组

函数种类: 资料处理


 
 
内容说明


本函数以 pattern 的规则来解析比对字符串 string。比对结果返回的值放在数组参数 regs 之中,regs[0] 内容就是原字符串 string、regs[1] 为第一个合乎规则的字符串、regs[2] 就是第二个合乎规则的字符串,余类推。若省略参数 regs,则只是单纯地比对,找到则返回值为 true。
 
 
使用范例
这个例子是 markus@dnet.it 在 14-jun-1999 所提出的,可对使用者输入的 e-mail 作简单的检查,检查使用者的 e-mail 字符串是否有 @ 字符,在 @ 字符前有英文字母或数字,在之后有数节字符串,最后的小数点后只能有二个或三个英文字母。super@mail.wilson.gs 就可以通过检查,super@mail.wilson 就不能通过检查。

if (eregi("^[_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3}$",$email)) {
  echo "您的 e-mail 通过初步检查";
}
?>

看一下

dedecms文件验证

if(!eregi("^[a-z0-9_-]{1,}.lib.php$",$filename))
  {
   showmsg('文件不是标准的标签碎片文件,不允许在此编辑!','-1');
   exit();
  }
  $fp = fopen(dedeinc.'/taglib/'.$filename,'r');
  $democode = fread($fp,filesize(dedeinc.'/taglib/'.$filename));
  fclose($fp);
  $title = "修改标签";

 

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