search
HomeBackend DevelopmentPHP TutorialSummary of methods to remove specified HTML tags in PHP_PHP tutorial

Summary of methods to remove specified HTML tags in PHP_PHP tutorial

Jul 13, 2016 pm 04:57 PM
htmlphpCanexistSummarizeusdesignationmethodLabeluseremove

In PHP, our most commonly used specified HTML tags can be directly replaced by the strip_tags function. You can use it to filter all HTML tags. Let me introduce to you other methods besides this function.

Sometimes we need to save html tag pages into the database, but in some cases we need to get pure data without html tags. At this time, we need to process the data with html tags and remove all html tags. Usually, htmlspecialchars() is used to filter html, but the characters of html are escaped, and the html source code is finally displayed. Using strip_tags(), the html tags can be removed.


PHP's default function removes specified html tags, named strip_tags, which is very useful in certain situations.

strip_tags


strip_tags — Strip HTML and PHP tags from a string


string strip_tags ( string str [, string allowable_tags] )

Disadvantages:


This function can only retain the desired html tags, which is the parameter string allowable_tags.

Other uses of the parameter allowable_tags of this function.

The code is as follows Copy code
 代码如下 复制代码


strip_tags($source, ”); 去掉所以的html标签。
strip_tags($source, ‘

Summary of methods to remove specified HTML tags in PHP_PHP tutorial’); 保留字符串中的div、img、em标签。

strip_tags($source, ”); Remove all html tags.

strip_tags($source, ‘
Summary of methods to remove specified HTML tags in PHP_PHP tutorial’); Retain the div, img, and em tags in the string.


If you want to remove the specified html tag. Then this function cannot meet the needs.
 代码如下 复制代码

function strip_only_tags($str, $tags, $stripContent = FALSE) {
  $content = '';
 
  if (!is_array($tags)) {
    $tags = (strpos($str, '>') !== false ? explode('>', str_replace('     if (end($tags) == '') {
      array_pop($tags);
    }
  }
 
  foreach($tags as $tag) {
    if ($stripContent) {
      $content = '(.+|s[^>]*>)|)';
    }
 
    $str = preg_replace('#|s[^>]*>)'.$content.'#is', '', $str);
  }
 
  return $str;
}

So I used this function.

The code is as follows Copy code
function strip_only_tags($str, $tags, $stripContent = FALSE) {

$content = '';

if (!is_array($tags)) {
$tags = (strpos($str, '>') !== false ? explode('>', str_replace(' If (end($tags) == '') {

       array_pop($tags);

}
 代码如下 复制代码


$target = strip_only_tags($source, array(‘a’,'em’,'b’));移除$source字符串内的a、em、b标签。

$source='


 ';
 
$target = strip_only_tags($source, array('a','em'));
 
//target results
//
Welcome to lixiphp.This a example from!
} foreach($tags as $tag) { If ($stripContent) { $content = '(.+|s[^>]*>)|)'; } $str = preg_replace('#|s[^>]*>)'.$content.'#is', '', $str ); } Return $str; }
Parameter description $str — refers to a string that needs to be filtered, such as div, p, em, img and other HTML tags. $tags — refers to the specified html tags that you want to remove, such as a, img, p, etc. $stripContent = FALSE — Remove the content within the tag, such as deleting the entire link, etc. The default is False, which means the content within the tag will not be deleted. Instructions for use
The code is as follows Copy code
$target = strip_only_tags($source, array(‘a’,’em’,’b’)); Remove the a, em, and b tags in the $source string. $source=' '; $target = strip_only_tags($source, array('a','em')); //target results //
Welcome to lixiphp.This an example from!
> ;

Other methods

{ $str=str_replace("
","",$str);
The code is as follows
 代码如下 复制代码


//取出br标记
function strip($str)
{
$str=str_replace("
","",$str);
//$str=htmlspecialchars($str);
return strip_tags($str);
}
?>

Copy code


//Remove the br tag

 代码如下 复制代码
**
 * 取出html标签
 *
 * @access public
 * @param string str
 * @return string
 *
 */
function deletehtml($str) {
    $str = trim($str); //清除字符串两边的空格
    $str = strip_tags($str,"

"); //利用php自带的函数清除html格式。保留P标签
    $str = preg_replace("/t/","",$str); //使用正则表达式匹配需要替换的内容,如:空格,换行,并将替换为空。
    $str = preg_replace("/rn/","",$str);
    $str = preg_replace("/r/","",$str);
    $str = preg_replace("/n/","",$str);
    $str = preg_replace("/ /","",$str);
    $str = preg_replace("/  /","",$str);  //匹配html中的空格
    return trim($str); //返回字符串
}
 

function strip($str)
//$str=htmlspecialchars($str); return strip_tags($str);

}

?> A custom function /
The code is as follows Copy code
** * Take out the html tag * * @access public
* @param string str
* @return string * */ function deletehtml($str) { $str = trim($str); //Clear spaces on both sides of the string $str = strip_tags($str,"

"); //Use the function that comes with php to clear the html format. Keep the P tag $str = preg_replace("/t/","",$str); //Use regular expressions to match the content that needs to be replaced, such as spaces, newlines, and replace them with nothing. $str = preg_replace("/rn/","",$str); $str = preg_replace("/r/","",$str); $str = preg_replace("/n/","",$str); $str = preg_replace("/ /","",$str); $str = preg_replace("/ /","",$str); //Match spaces in html Return trim($str); //Return string } http://www.bkjia.com/PHPjc/631529.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631529.htmlTechArticleIn php, our most commonly used specified HTML tags can be directly replaced by the strip_tags function, which can filter all html tag, let me introduce to you other functions besides this...

Statement
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
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

See all articles

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

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software