PHP正则表达式及表单注册案例

发布时间：2020-12-13 20:55:31 所属栏目：PHP教程来源：网络整理

导读：正则表达式是一种具有特定模式的用来匹配文本的字符串 preg_match 匹配 $pattern = '/php/' ; $subject = "php 是最好的编程语言，php 没有之一！" ; $result = preg_match ( $pattern , $subject ); if ( $result ){ echo "h1匹配成功/h1" ;} else { echo "

正则表达式是一种具有特定模式的用来匹配文本的字符串

preg_match 匹配

$pattern = '/php/';
$subject = "php 是最好的编程语言，php 没有之一！";

$result = preg_match($pattern,$subject);

if($result){
    echo "<h1>匹配成功</h1>";
}else{
    echo "<h1>匹配不成功</h1>";
}

preg_match_all 匹配所有

$subject = "php是最好的编程语言，不会php的程序员不是好程序员！"preg_match_all($subject,1)">$matches);
var_dump(//preg_match===
//int 1
//array (size=1)
//  0 => string 'php' (length=3)

//preg_match_all ====
//int 2
//array (size=1)
//  0 =>
//    array (size=2)
//      0 => string 'php' (length=3)
//      1 => string 'php' (length=3)

preg_replace 正则替换

preg_filter() 等价于 preg_replace() ，但它仅仅返回与目标匹配的结果

$pattern = '/www..*.com/'$replacement = 'www.test.com'$subject = [
    'www.baidu.com','www.google.com','coding.test.com'
];
preg_replace($replacement,1)">array(3) {
//    [0] =>
//  string(12) "www.test.com"
//    [1] =>
//  string(12) "www.test.com"
//    [2] =>
//  string(15) "coding.test.com"
//}

$result1 = preg_filter($result1array(2) {
//    [0] =>
//  string(12) "www.test.com"
//    [1] =>
//  string(12) "www.test.com"
//}

正则搜索并使用回调替换

$pattern = '/(.*)(d{4})(-d{2}-d{2})/'$subject = "今天是2020-01-14"preg_replace_callback(function nextyear($varsreturn '明年的'.$vars[1].($vars[2]+1).$vars[3];string(28) "明年的今天是2021-01-14"
}

array (size=4)
//  0 => string '今天是2020-01-14' (length=19)
//  1 => string '今天是' (length=9)
//  2 => string '2020' (length=4)
//  3 => string '-01-14' (length=6)

PREG_GREP_INVERT 返回没有被匹配替换到的

preg_grep(PREG_GREP_INVERT);
$result);string(16) "coding.imooc.com"

preg_split 按照指定规则分割字符串转数组

$pattern = '/||,|s/'$replacement = '|'$subject = "php|asp,jsp html"$result1 = preg_split(array (size=4)
//  0 => string 'php' (length=3)
//  1 => string 'asp' (length=3)
//  2 => string 'jsp' (length=3)
//  3 => string 'html' (length=4)

转义正则表达式字符

$str = '<a href="http://www.test.com">测试网</a>'preg_quote($str,'/');
$pattern = '/'.$result.'/'$subject = '<a href="http://www.test.com">测试网</a>';
echo &;a href="http://www.test.com"&;测试网&;/a&;

（）单独获取

$pattern = '/[da-z]+([._-]*[da-z]+)*@[da-z]+([.-][da-z]+)*.[a-z]+/i'$subject = <<<php
    imooc123@qq.com
    //IMOOC.123@qq.com
    //imooc_123@qq123.com
    //imooc--123@qq.com
    //imooc123@qq.com.cn
    //imooc123@vip-qq.com
php;

array(3) {
//    [0] =>//打印出所有匹配到的
//  array(6) {
//        [0] =>
//    string(15) "imooc123@qq.com"
//        [1] =>
//    string(16) "IMOOC.123@qq.com"
//        [2] =>
//    string(19) "imooc_123@qq123.com"
//        [3] =>
//    string(17) "imooc--123@qq.com"
//        [4] =>
//    string(18) "imooc123@qq.com.cn"
//        [5] =>
//    string(19) "imooc123@vip-qq.com"
//  }
//  [1] =>//打印出第一个（）里的
//  array(6) {
//        [0] =>
//    string(0) ""
//        [1] =>
//    string(4) ".123"
//        [2] =>
//    string(4) "_123"
//        [3] =>
//    string(5) "--123"
//        [4] =>
//    string(0) ""
//        [5] =>
//    string(0) ""
//  }
//  [2] =>//打印出第二个（）里的
//  array(6) {
//        [0] =>
//    string(0) ""
//        [1] =>
//    string(0) ""
//        [2] =>
//    string(0) ""
//        [3] =>
//    string(0) ""
//        [4] =>
//    string(4) ".com"
//        [5] =>
//    string(3) "-qq"
//  }
//}

ajax注册表单案例

index.html

<!DOCTYPE html>
<html lang="en"head>
    meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    link rel="stylesheet" type="text/css" href="css/base.css" ="css/register.css" title>用户注册表单验证</script src="js/jquery.js"></script>

bodydiv class="wrapper container"h2>用户注册form onsubmit="return post(this)">
        p ="clearfix">
            label ="one">手机号码：labelinput name="telphone" class="text" placeholder="请输入手机号" />
            ="error">请输入正确的手机号p="one" >校验码：="code"  placeholder="请输入手机6位校验码" ="get_code"="button" value="获取验证码" >请填写手机接收到的6位数校验码>
             >登录密码：="password"  class="请输入6-16位密码" >密码在6-16个字符之间>确认密码：="c_password"="请再次输入密码" >确认密码和密码不一致>姓名：="name"="请输入2-6位中文" >请输入2-6位中文>身份证：="idcard"="请输入18位二代身份证号码" >请输入18位二代身份证号码>邮箱：="email"="请输入Email邮箱" >Email邮箱不正确>
           ><="submit"="立即注册"/></formdiv>
    function post(obj) {
        var postData = $(obj).serialize();
        $.post('php/check.php,{postData:postData}, (data) {
            if(data.code){
                $("input[name=+data.sign]).siblings(.error).show();
            }else{
                location.href = ok.html;
            }
        },1)">json);
        return false;
    }
html>

ok.html

charset="UTF-8">Titleh1>注册成功！>

base.css

/* CSS Document */
*{margin:0; padding:0;}
a{text-decoration:none; cursor:pointer;}
li{list-style:none;}
img{border:
html,body{ font-size:16px; font-family:"微软雅黑"; overflow-x:hidden;}

.wrapper{width:820px; margin:0 auto;}
.left{float:left;}
.right{right;}
.clearfix:after{content:"."; display:block; clear:both; overflow:hidden; height:
.clearfix{zoom:1;}
.red{color:#f93;}

.mt{ margin-top:10px;}
.mr{ margin-right:
.mb{ margin-bottom:
.ml{ margin-left:10px;}


----header-----

.header{height:35px; line-height: background:#5a84d1; color:#fff;14px;}
.header a{#fff;}

.weixin{position:relative; width:120px;38px; text-align:center;}
.wx{display:inline-block;url(../img/weixinhui.png) no-repeat;}
.wx:hover{background:url(../img/weixin.png) no-repeat;}
.erweima{absolute; top: left: border:1px solid #999; z-index:100;}

.header .right #time{margin-left:20px;}

.top{74px;1140px;10px auto}
-------logo-------
.logo{15px;}
.logo a{block;}
.slogo{170px;60px;10px; padding-left: border-left:1px solid #ccc;20px;}


-------nav-------
.nav{right;30px;30px;}
.nav li{left; position:115px;
.nav li a{font-size:20px;#3a3a3a;}
.nav li:hover > a{#28a7e1}
.nav li:hover > ul{visibility:visible; opacity:1; }
.nav li a {
    -webkit-transition:color 0.2s linear,background 0.2s linear;
    -moz-transition:
    -o-transition:
    transition:
.subnav {100;center;rgba(0,0.4); 
    -webkit-transition:opacity 0.2s linear,visibility 0.2s linear; 
    -moz-transition: 
    -o-transition: 
    transition:
.subnav li{clear:100%;0 none;}
.subnav li a{
.subnav li:hover > a{#80eef5;}


-------footer-----
.footer{#eee;  padding-bottom:50px;}
.footer a{#000;}
.list1{20px 15px 40px;}
.list1 li{40px;40px;}
.list1 a.first:hover{url(img/redIcon.png) 0 6px no-repeat;}

.list1 a.first{float:left;*/margin-right:23px; text-indent:15px; font-weight:bold;#111;}

.sublist li{left;/**/11px;}
.sublist li a{

.par{text-align:
.par a{padding:0 10px;}

.footer div.right{20px 25px 40px 0; }


kefu
#sidekf{url(../img/222.png) no-repeat left bottom;225px;200px;fixed; _position: right:-139px;top:_top:expression(documentElement.scrollTop+40);z-index:9;}
#sidekf .lnk{ float:225px;}
#sidekf .ovh{100px;}
#sidekf a{128px;97px;}
.sidekf_qq1{33px;35px;}
.sidekf_qq2{36px;3px;}
.sidekf_qq3{3px;}



.container{5px auto;1px solid #D8D8D8; #F9F9F9;50px;"微软雅黑"}
.container h2{#333;}
form{20px 0 0 120px;}
form p{margin-bottom:
form a{#ff7702;}

h2{
label{48px;#F00;
label.one{90px;

input{#666;}
.text,.submit{300px;46px;
.error{ none;}

.code{180px; _line-height:
.get_code{110px;

.agreement{12px;}
.agreement input{12px;8px 8px 0 5px;url(../img/checkbox.png) no-repeat; }#337AB7;#FFF;}

.submit{#F93; letter-spacing:4px;

p.last{310px;16px;}
p.last input{pointer;}

check.php

<?php
parse_str($_POST['postData'],1)">$postif(!preg_match('/^1d{10}$/',1)">$post['telphone'])){
   echo json_encode(['code'=>1,'sign'=>'telphone']);
    return ;
}
$post['code']!='123456'preg_match('/^.{6,16}$/',1)">$post['password'])){
    $post['c_password']!=]){
    preg_match('/^[x80-xff]{6,18}$/',1)">$post['name'preg_match('/^d{18}$/',1)">$post['idcard'preg_match('/^[da-z]+([._-]*[da-z]+)*@[da-z]+([.-][da-z]+)*.[a-z]+$/',1)">$post['email' ;
}

将合法数据写入数据库
echo json_encode(['code'=>0]);

UTF8编码下汉字Unicode编码范围：x80-xff

//array (size=1)
//'postData' => string 'telphone=222221&password=&c_password=&name=&idcard=&email=' (length=58)

//array (size=6)
//  'telphone' => string '222221' (length=6)
//  'password' => string '' (length=0)
//  'c_password' => string '' (length=0)
//  'name' => string '' (length=0)
//  'idcard' => string '' (length=0)
//  'email' => string '' (length=0)