Table of Contents
回复讨论(解决方案)
Home Backend Development PHP Tutorial 如何正则出HTTP开头的JPG图片?

如何正则出HTTP开头的JPG图片?

Jun 23, 2016 pm 02:23 PM

我使用 simple_html_dom.php, 只会找出HTTP开头的图片,如何再加一个JPG结尾的判断?

foreach ($html->find('img[src^="http"]') as $element) 
Copy after login


或者
哪位给写个 preg_match_all 所有 HTTP开头的JPG图片?谢谢。


回复讨论(解决方案)

不是太明白你想表达的意思,这是我学正则的时候写的,获取一个网页图片的,

<?php/* * @param string $url 采集url * @param int $isinsite 是否为站内的 默认1为站内0为站外站内 * @return string  */function getallimg($url,$isinsite=1){    $urlstr=parse_url($url);    $url=$urlstr[scheme]?$url:"http://".$urlstr[path];//判断用户输入的网址有没有包含http://再进行补全    $urlstr=parse_url($url);    $site="http://".$urlstr[host];//取本站地址    $subject =file_get_contents($url);    $pattern = '/.*<img  src="/static/imghw/default1.png"  data-src=".$url."  class="lazy"  .*src=[\'|\"](.*[.jpg|.gif|.png])[\'|\"].*\/?? alt="如何正则出HTTP开头的JPG图片?" >.*/U';//其中的//为分隔符    preg_match_all($pattern,$subject,$result);//查找所有的匹配项    if($isinsite==0)    {       foreach ($result as $key => $value) //二维数组$result[n][m];               {	             if($key==1)	               {   		            foreach ( $value as $key => $value )//取$result[m]		                    {			                   $isownsite=parse_url($value);			                   $url=$isownsite[host]?$value:$site.$isownsite[path];//获取该网页的所有图片还其他网址的			                   $imgcontent.="<img  src="/static/imghw/default1.png"  data-src=".$url."  class="lazy"    alt="如何正则出HTTP开头的JPG图片?" >|";		                    }		           }               }    }    if($isinsite==1)    {       foreach ($result as $key => $value) //二维数组$result[n][m];               {	             if($key==1)	               {   		            foreach ( $value as $key => $value )//取$result[m]		                    {			                   $isownsite=parse_url($value);			                   $url=$isownsite[host]?NULL:$site.$isownsite[path];//只获取该site的不含外部网址			                   if($url!=NULL)			                   $imgcontent.="<img  src="/static/imghw/default1.png"  data-src=".$url."  class="lazy"    alt="如何正则出HTTP开头的JPG图片?" >|";		                    }		           }               }    }    return $imgcontent;}?><form action="getimg.php" method="post"><input type="radio" name="onlysite" value="1" />找全站内图片<br/><input type="radio" name="onlysite" value="0" />找全站内站外图片<br/><input type="text"name="site" size="70"/>多个网址请用&#64;隔开如:www.baidu.com@www.h2ero.cn<br/><input type="submit"  name="name" value="找图" /></form><?php$url=$_POST[site];$url=explode("@",$url);$isinsite=$_POST[onlysite];for ( $i = 0;$i <2; $i++ ) {	    if($url[$i]!=NULL)	echo getallimg($url[$i],$isinsite);}?>
Copy after login

.*如何正则出HTTP开头的JPG图片?.*/U'
这样的话,连"../images/1.jpg"也抓出来了。
而我需要的是 http:// 开头的所有图片 "http://domain.com/images/1.jpg"

你就正则匹配http开头就好了

你就正则匹配http开头就好了
现在过渡依赖于simple_html_dom,怎么修改正则呢?

再加一句正则就可以了

foreach ($html->find('img[src^="http"]') as $element) {
if(preg_match('/\.jpg/i',$element->src)){
echo $element->src . "
\n";
}
}

感谢 ,life169

你就正则匹配http开头就好了











快来给我 说说你我离婚后 分组家庭的情况吧

phpinfo();
Copy after login

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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

What are Enumerations (Enums) in PHP 8.1? What are Enumerations (Enums) in PHP 8.1? Apr 03, 2025 am 12:05 AM

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles