PHP正则表达式及表单注册案例

更新时间:2023-04-08 02:58:57 阅读：评论：0

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！";$result = preg_match($patte大闹清风寨rn,$subject);if($result){    echo "<h1>匹配成功</h1>";}el{    echo "<h1>匹配不成功</h1>";}

preg_match_all 匹配所有

$pattern = '/php/';$subject = "php是最好的编程语言，不会php的程序员不是好程序员！";$result = preg_match_all($pattern,$subject,$matches);var_dump($result);var_dump($matches);//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';$subject = [    'www.baidu.com',    'www.google.com',    'coding.test.com'];$result = preg_replace($pattern,$replacement,$subject);var_dump($result);//array(3) {//    [0] =>//  string(12) "www.test.com"//    [1] =>//  string(12) "www.test.com"//    [2] =>//  string(15) "coding.test.com"//}$result1 = preg_filter($pattern,$replacement,$subject);var_dump($result1);//array(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";$result = preg_replace_callback($pattern,'nextyear',$subject);var_dump($result);function nextyear($vars){    return '明年的'.$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

$pattern = '/www\..*\.com/';$subject = [    'www.baidu.com',    'www.google.com',    'coding.imooc.com'];$result = preg_grep($pattern,$subject,preg_grep_invert);var_dump($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($pattern,$subject,3);var_dump($result1);//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

$str = '<a href="http://www.test.com">测试网</a>';$result = preg_quote($str,'/');$pattern = '/'.$resu七年级英语工作总结lt.'/';$subject = '<a href="http://www.test.com">测试网</a>';echo preg_match($pattern,$subject);//\<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.comphp;preg_match_all($pattern,$subject,$matches);var_dump($matches);//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; chart=utf-8" />    <link rel="stylesheet" type="text/css" href="css/ba.css" />    <link rel="stylesheet" type="text/css" href="css/register.css" />    <title>用户注册表单验证</title>    <script src="js/jquery.js"></script></head><body><div class="wrapper container">    <h2>用户注册</h2>    <form onsubmit="return post(this)">        <p class="clearfix">            <label class="one">手机号码：</label>            <input name="telphone" class="text" placeholder="请输入手机号" />            <label class="error">请输入正确的手机号</label>        </p>        <p class="clearfix">            <label class="one" >校验码：</label>            <input name="code" class="code" type="text"  placeholder="请输入手机6位校验码" />            <input class="get_code" type="button" value="获取验证码" />            <label class="error">请填写手机接收到的6位数校验码</label>        </p>        <p class="clearfix">             <label class="one">登录密码：</label>            <input name="password" type="password"  class="text" placeholder="请输入6-16位密码" />            <label class="error">密码在6-16个字符之间</label>        </p>        <p class="clearfix">            <label class="one">确认密码：</label>            <input name="c_password" type="password"  class="text" placeholder="请再次输入密码" />            <label class="error">确认密码和密码不一致</label>        </p>        <p class="clearfix">            <label class="one">姓名：</label>            <input name="name" type="text" class="text" placeholder="请输入2-6位中文" />            <label class="error">请输入2-6位中文</label>        </p>        <p class="clearfix">            <label class="one">身份证：</label>            <input name="idcard" type="text"  class="text"  placeholder="请输入18位二代身份证号码" />            <label class="error">请输入18位二代身份证号码</label>        </p>        <p class="clearfix">            <label cla桥梁工程师2ss="one">邮箱：</label>            <input name="email" type="text" class="text" placeholder="请输入email邮箱" />            <label class="error">email邮箱不正确</label>        </p>           <p class="clearfix"><input class="submit" type="submit" value="立即注册"/></p>    </form></div><script>    function post(obj) {        var postdata = $(obj).rialize();        $.post('php/check.php',{postdata:postdata},function (data) {            if(data.code){                $("input[name="+data.sign+"]").siblings('.error').show();            }el{                location.href = 'ok.html';            }        },'json');        return fal;    }</script></body></html>

ok.html

<!doctype html><html lang="en"><head>    <meta chart="utf-8">    <title>title</title></head><body>    <h1>注册成功！</h1></body></html>

ba.css

/* css document */*{margin:0; padding:0;}a{text-decoration:none; cursor:pointer;}li{list-style:none;}img{border:none;}html,body{ font-size:16px; font-family:"微软雅黑"; overflow-x:hidden;}.wrapper{width:820px; margin:0 auto;}.left{float:left;}.right{float:right;}.clearfix:after{content:"."; display:block; clear:both; font-size:0; overflow:hidden; height:0;}.clearfix{zoom:1;}.red{color:#f93;}.mt{ margin-top:10px;}.m独立学院是什么意思r{ margin-right:10px;}.mb{ margin-bottom:10px;}.ml{ margin-left:10px;}/*----header-----*/.header{height:35px; line-height:35px; background:#5a84d1; color:#fff; font-size:14px;}.header a{color:#fff;}.weixin{position:relative; display:block; width:120px; height:38px; text-align:center;}.wx{display:inline-block; width:35px; height:35px; background:url(../img/weixinhui.png) no-repeat;}.wx:hover{background:url(../img/weixin.png) no-repeat;}.erweima{position:absolute; top:35px; left:0; display:block; width:120px; height:120px; border:1px solid #999; z-index:100;}.header .right #time{margin-left:20px;}.top{height:74px; width:1140px; margin:10px auto}/*-------logo-------*/.logo{height:74px; margin-right:15px;}.logo a{display:block;}.slogo{width:170px; height:60px; margin-top:10px; padding-left:10px; overflow:hidden; border-left:1px solid #ccc; font-size:20px;}/*-------nav-------*/.nav{float:right; height:30px; margin-top:30px; line-height:30px;}.nav li{怎样清心寡欲float:left; position:relative; width:115px; text-align:center;}.nav li a{font-size:20px; color:#3a3a3a;}.nav li:hover > a{color:#28a7e1}.nav li:hover > ul{visibility:visible; opacity:1; }.nav li a {text-decoration:none; display:inline-block;    -webkit-transition:color 0.2s linear, background 0.2s linear;    -moz-transition:color 0.2s linear, background 0.2s linear;    -o-transition:color 0.2s linear, background 0.2s linear;    transition:color 0.2s linear, background 0.2s linear; }.subnav {visibility:hidden; opacity:0; position:absolute; top:30px; left:0; z-index:100; width:115px; text-align:center; background:rgba(0,0,0,0.4);     -webkit-transition:opacity 0.2s linear, visibility 0.2s linear;     -moz-transition:opacity 0.2s linear, visibility 0.2s linear;     -o-transition:opacity 0.2s linear, visibility 0.2s linear;     transition:opacity 0.2s linear, visibility 0.2s linear; }.subnav li{clear:both; width:100%; border:0 none;}.subnav li a{display:inline-block; color:#fff;}.subnav li:hover > a{color:#80eef5;}/*-------footer-----*/.footer{background:#eee;  padding-bottom:50px;}.footer a{color:#000;}.list1{margin:20px 15px 40px;}.list1 li{height:40px; line-height:40px;}.list1 a.first:hover{background:url(img/redicon.png) 0 6px no-repeat;}.list1 a.first{/*float:left;*/margin-right:23px; text-indent:15px; font-weight:bold; color:#111;}.sublist li{float:left;/**/ margin-right:11px;}.sublist li a{color:#111;}.par{text-align:center;}.par a{padding:0 10px;}.footer div.right{margin:20px 25px 40px 0; }/*kefu*/#sidekf{background:url(../img/222.png) no-repeat left bottom;width:225px; height:200px; position:fixed; _position:absolute; right:-139px;top:40px;_top:expression(documentelement.scrolltop+40);z-index:9;}#sidekf .lnk{ float:left;width:225px;}#sidekf .ovh{ float:right;width:35px; height:100px;}#sidekf a{display:block;width:128px; margin-left:97px;}.sidekf_qq1{height:33px; margin-top:35px;}.sidekf_qq2{height:36px; margin-top:3px;}.sidekf_qq3{height:36px; margin-top:3px;}

/* css document */.container{margin:5px auto; border:1px solid #d8d8d8; background: #f9f9f9; padding:50px; font-family:"微软雅黑"}.container h2{text-align:center; color:#333;}form{margin:20px 0 0 120px;}form p{margin-bottom:10px;}form a{ color:#ff7702;}h2{ line-height:60px; font-size:30px; color:#333;}label{display:block; float:left; height:48px; line-height:48px; color:#f00; text-indent:10px;}label.one{width:90px; height:48px; text-align:right; color:#333;}input{float:left;font-size:16px; font-family:"微软雅黑"; color:#666;}.text,.submit{border:1px solid #ccc; width:300px; height:46px; text-indent:10px;}.error{display: none;}.code{height:46px; width:180px; _line-height:46px; text-indent:10px;}.get_code{height:48px; width:110px; margin-left:10px; border:1px solid #ccc; cursor:pointer;}.agreement{margin-left:90px; height:30px; line-height:30px;font-size:12px;}.agreement input{display:block; line-height:30px; height:12px; margin:8px 8px 0 5px; border:none; width:12px; background:url(../img/checkbox.png) no-repeat; }.get_code{background:#337ab7; color:#fff;}.submit{margin-left:90px; background:#f93; font-size:20px; letter-spacing:4px; color:#fff; cursor:pointer;}p.last{margin-left:310px; font-size:16px;}p.last input{ cursor:pointer;}

check.php

<?phppar_str($_post['postdata'],$post);if(!preg_match('/^1\d{10}$/',$post['telphone'])){   echo json_encode(['code'=>1,'sign'=>'telphone']);    return ;}if($post['code']!='123456'){    echo json_encode(['code'=>1,'sign'=>'code']);    return ;}if(!preg_match('/^.{6,16}$/',$post['password'])){    echo json_encode(['code'=>1,'sign'=>'password']);    return ;}if($post['c_password']!=$post['password']){    echo json_encode(['code'=>1,'sign'=>'c_password']);    return ;}if(!preg_match('/^[\x80-\xff]{6,18}$/',$post['name'])){    echo json_encode(['code'=>1,'sign'=>'name']);    return ;}if(!preg_match('/^\d{18}$/',$post['idcard'])){    echo json_encode(['code'=>1,'sign'=>'idcard']);    return ;}if(!preg_match('/^[\da-z]+([\._\-]*[\da-z]+)*@[\da-z]+([\.\-][\da-z]+)*\.[a-z]+$/',$post['email'])){    echo json_encode(['code'=>1,'sign'=>'email']);    return ;}//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=111111&password=&c_password=&name=&idcard=&email=' (length=58)//array (size=6)//  'telphone' => string '111111' (length=6)//  'password' => string '' (length=0)//  'c_password' => string '' (length=0)//  'name' => string '' (length=0)//  'idcard' => string '' (length=0)//  'email' => string '' (length=0)

基础知识补充：

在线调试工具
/d/file/titlepic/pp“汉字”建议使用unicode编码再进行匹配br />在线转码工具：http://tool.chinaz.com/tools/unicode.aspx

不可见原子

自定义原子

通用字符类型作原子

元字符
元字符就是指那些在正则表达式中具有特殊意义的专用字符

边界限制符

量词

禁止贪婪

？

当该字符紧跟在任何一个其他限制符 (*, +, {n,}, {n,m})
后面时，匹配模式是非贪婪的。

模式修正符