Strip_tags()

Introduction

The strip_tags() function in PHP is used to strip HTML and PHP tags from a string. It removes all HTML and PHP tags from the specified string, leaving only the plain text content. In this article, we will be discussing the strip_tags() function in detail and how it can be used in PHP.

Understanding the strip_tags() function

The strip_tags() function in PHP removes all HTML and PHP tags from the specified string. The syntax for using the strip_tags() function is as follows:

strip_tags ( string $str [, string $allowable_tags ] ) : string

Here, $str is the string that is being stripped of HTML and PHP tags. The optional parameter $allowable_tags can be used to specify a list of allowed tags that should not be stripped from the string. The function returns the resulting string with all HTML and PHP tags removed.

Example Usage

Let's look at an example to understand the usage of the strip_tags() function in PHP:

<?php

$str = "<h1>Hello World</h1><p>This is a paragraph.</p>";
$result = strip_tags($str);
echo $result;

In the example above, we use the strip_tags() function to remove all HTML and PHP tags from the string "<h1>Hello World</h1><p>This is a paragraph.</p>". The resulting string "Hello WorldThis is a paragraph." is then displayed on the screen using the echo statement.

Using the $allowable_tags parameter

Let's look at another example to understand how the $allowable_tags parameter can be used with the strip_tags() function:

<?php

$str = "<h1>Hello World</h1><p>This is a paragraph.</p><a href='https://www.example.com'>Example link</a>";
$result = strip_tags($str, "<a>");
echo $result;

In the example above, we use the strip_tags() function to remove all HTML and PHP tags from the string "<h1>Hello World</h1><p>This is a paragraph.</p><a href='https://www.example.com'>Example link</a>". However, we specify the <a> tag as an allowable tag using the $allowable_tags parameter. As a result, the function only removes the <h1> and <p> tags from the string, leaving the <a> tag intact. The resulting string "<a href='https://www.example.com'>Example link</a>" is then displayed on the screen using the echo statement.

Conclusion

The strip_tags() function in PHP is a powerful tool that can be used to strip HTML and PHP tags from a string. It is an essential function to use when working with string manipulation in PHP. By using the strip_tags() function, developers can quickly and easily remove all HTML and PHP tags from a string, leaving only the plain text content. We hope this article has provided you with a comprehensive overview of the strip_tags() function in PHP and how it can be used. If you have any questions or need further assistance, please do not hesitate to ask.