简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > PHP Tutorial > body text

PHP regular expression code to determine whether the IP is legal

高洛峰
Release： 2016-11-29 16:06:06
Original
1764 people have browsed it

function matchip($q){ 
preg_match('/((25[0-5])|(2[0-4]d)|(1dd)|([1-9]d)|d)(.((25[0-5])|(2[0-4]d)|(1dd)|([1-9]d)|d)){3}/', $q, $matches); 
return $matches[0]; 
} 
$ipaddress = '201.103.2.2'; 
$iperror ='262.3.6.6'; 
$iptest = matchip( $ipaddress ); 
//当我们给matchip 的值为$ipaddress输出为201.103.2.2 
//当我们给matchip的函数值为$iperror时，输出值为 62.3.6.6 
 代码如下 复制代码 
if( $iptest ) 
{ 
 echo $iptest; 
} 
else 
{ 
 echo 'phpfensi.com提示：你输的的ip地址有问题'; 
}
Copy after login


Related labels：
php
source：php.cn
Previous article：php collect remote pictures Next article：PHP string and Chinese character splitting method
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
PHP arrays obtained from URL parameters do not behave as expected I have a URL parameter that contains the category ID and I want to treat it as an array li...
From 2024-04-06 22:09:02
0
1
1428
Where should I place CustomLog directive in apache I'm using php:7.2-apachedocker. I need to disable health check url login access log. Based...
From 2024-04-06 22:03:59
0
1
990
What is the format of the variables in the return value? I am a new learner of php. I found a piece of code: if($x<time()){return[false,'error']...
From 2024-04-06 21:55:20
0
1
778
Problems encountered when using opentbs to generate odt files: values ​​of the same key are displayed in the same row instead of separate columns. I'm using a library called OpenTbs to create odt using PHP, I'm using it because columns a...
From 2024-04-06 20:18:18
0
1
483
Group MySQL results by ID for looping over I have a table with flight data in mysql. I'm writing a php code that will group and displ...
From 2024-04-06 17:27:56
0
1
406
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！