关于preg_match_all返回的数组-PHP Tutorial-php.cn

Table of Contents

回复内容：

Home

Backend Development

PHP Tutorial

关于preg_match_all返回的数组

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 06, 2016 pm 08:43 PM

php regular expression programmer

我想用正则表达式匹配html的

标签内的
用的正则表达式是 #(.*)#

因为匹配的原文其实就是一个有规律的表格我想要将匹配出来的多个结果分别存入数据库中

但是返回的二维数组我不明白
我的理解是第一维的结果是正常匹配出来的结果然后第二维是在一维的结果内再进行匹配吗但是实际出来第一维数组和第二维数组是一样的呀

我找到一个preg_match参数
参数说明：
参数说明
pattern 正则表达式
subject 需要匹配检索的对象
matches 可选，存储匹配结果的数组， $matches[0] 将包含与整个模式匹配的文本，$matches[1] 将包含与第一个捕获的括号中的子模式所匹配的文本，以此类推

（o.o 类推你妹呀看不懂呀初学者让大家）

代码如下

<code><?php // 用正则表达式 匹配 TR标签 第二个TR标签 为第一大节课  对该段标签 再去匹配td标签  结果有7个  依次为 星期一到星期天第一节课的内容
$test = "
<TBODY>
<tr bgcolor="#eeeeee">
<td width='\"9%\"'>
<div align="center"> </div>
</td>
<td width='\"13%\"'>
<div align="center">星期一</div>
</td>
<td width='\"13%\"'>
<div align="center">星期二</div>
</td>
<td width='\"13%\"'>
<div align="center">星期三</div>
</td>
<td width='\"13%\"'>
<div align="center">星期四</div>
</td>
<td width='\"13%\"'>
<div align="center">星期五</div>
</td>
<td width='\"13%\"'>
<div align="center">星期六</div>
</td>
<td width='\"13%\"'>
<div align="center">星期日</div>
</td>
</tr>

<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第一大节</div>
</td>
<td valign="top" align="center">11</td>

<td valign="top" align="center">12</td>

<td valign="top" align="center">13</td>

<td valign="top" align="center">14</td>

<td valign="top" align="center">15</td>

<td valign="top" align="center">16</td>

<td valign="top" align="center">17</td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第二大节</div>
</td>
<td valign="top" align="center">21;</td>

<td valign="top" align="center">22</td>

<td valign="top" align="center">形势与政策（6）<br>第10周<br>吕志和礼堂 白文杰</td>

<td valign="top" align="center">24</td>

<td valign="top" align="center">25</td>

<td valign="top" align="center">26</td>

<td valign="top" align="center">27</td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第三大节</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center">英语</td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center">数学</td>

<td valign="top" align="center"> </td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第四大节</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center">音乐</td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">晚　上</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

</tr>

<tr>

";





function trimall($str)//删除全部空格
{
    $qian=array(" ","　","\t","\n","\r");$hou=array("","","","","");
    return str_replace($qian,$hou,$str);    
}
$test = trimall($test);


$match = "#</tr>
<tr>(.*)</tr>#";
preg_match_all($match,$test,$TR);
print_r($TR);

?>
</code>

Copy after login

回复内容：

我想用正则表达式匹配html的

标签内的
用的正则表达式是 #(.*)#

因为匹配的原文其实就是一个有规律的表格我想要将匹配出来的多个结果分别存入数据库中

（o.o 类推你妹呀看不懂呀初学者让大家）

代码如下

<code><?php // 用正则表达式 匹配 TR标签 第二个TR标签 为第一大节课  对该段标签 再去匹配td标签  结果有7个  依次为 星期一到星期天第一节课的内容
$test = "
<TBODY>
<tr bgcolor="#eeeeee">
<td width='\"9%\"'>
<div align="center"> </div>
</td>
<td width='\"13%\"'>
<div align="center">星期一</div>
</td>
<td width='\"13%\"'>
<div align="center">星期二</div>
</td>
<td width='\"13%\"'>
<div align="center">星期三</div>
</td>
<td width='\"13%\"'>
<div align="center">星期四</div>
</td>
<td width='\"13%\"'>
<div align="center">星期五</div>
</td>
<td width='\"13%\"'>
<div align="center">星期六</div>
</td>
<td width='\"13%\"'>
<div align="center">星期日</div>
</td>
</tr>

<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第一大节</div>
</td>
<td valign="top" align="center">11</td>

<td valign="top" align="center">12</td>

<td valign="top" align="center">13</td>

<td valign="top" align="center">14</td>

<td valign="top" align="center">15</td>

<td valign="top" align="center">16</td>

<td valign="top" align="center">17</td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第二大节</div>
</td>
<td valign="top" align="center">21;</td>

<td valign="top" align="center">22</td>

<td valign="top" align="center">形势与政策（6）<br>第10周<br>吕志和礼堂 白文杰</td>

<td valign="top" align="center">24</td>

<td valign="top" align="center">25</td>

<td valign="top" align="center">26</td>

<td valign="top" align="center">27</td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第三大节</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center">英语</td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center">数学</td>

<td valign="top" align="center"> </td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">第四大节</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center">音乐</td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

</tr>
<tr>
<td valign="center" bgcolor="#eeeeee">
<div align="center">晚　上</div>
</td>
<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

<td valign="top" align="center"> </td>

</tr>

<tr>

";





function trimall($str)//删除全部空格
{
    $qian=array(" ","　","\t","\n","\r");$hou=array("","","","","");
    return str_replace($qian,$hou,$str);    
}
$test = trimall($test);


$match = "#</tr>
<tr>(.*)</tr>#";
preg_match_all($match,$test,$TR);
print_r($TR);

?>
</code>

Copy after login

请问你理解了这句话吗？
$matches[1] 将包含与第一个捕获的括号中的子模式所匹配的文本，括号指的是什么？

理解之后，我在提醒下，你的$matches[0]肯定比$matches[1]要多 TR 这个标签吧？

preg_match_all不是匹配一次就停止，而是匹配完得到所有的结果。所以$matches[0]就不是string而是array of string。然后每个匹配得到的表达式都对应一个子串，所以[1]同理。

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

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

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

Hot Article

Assassin's Creed Shadows: Seashell Riddle Solution

1 months ago By DDD

What's New in Windows 11 KB5054979 & How to Fix Update Issues

3 weeks ago By DDD

Where to find the Crane Control Keycard in Atomfall

1 months ago By DDD

How to fix KB5055523 fails to install in Windows 11?

2 weeks ago By DDD

InZoi: How To Apply To School And University

3 weeks ago By DDD

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7797

Java Tutorial

1644

CakePHP Tutorial

1402

Laravel Tutorial

1299

PHP Tutorial

1234

Related knowledge

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

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,

PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

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.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

See all articles