How to use regular matching to remove html tags in php

In web development, HTML is an inevitable part. However, in some cases, we may need to extract text content from HTML source code without including any HTML tags. This is where PHP regular expressions come in.

In this article, we will learn how to use PHP regular expressions to remove HTML tags and extract plain text content from HTML strings. To demonstrate how to remove HTML tags, let's first define a string containing HTML tags.

$html_string = "<div><h1 id="Hello-nbsp-World">Hello World</h1><p>This is <strong>PHP</strong>.</p></div>";

The above code defines a string with standard HTML tags. Our goal is to remove all HTML markup and leave only plain text content.

PHP regular expression function preg_replace() is one of the simplest ways to remove HTML tags. Let us use preg_replace() function to remove all HTML tags from the string.

The following code demonstrates how to use the preg_replace() function to remove HTML tags.

$plain_text = preg_replace(&#39;/<[^<]+>/&#39;, &#39;&#39;, $html_string);
echo $plain_text;

In the above code, we define a preg_replace() function with a regular expression pattern. The regular expression pattern `//` means to find anything starting with "" and ending with "<code>>" substring and replaces it with an empty string. This will remove all HTML tags.

Finally, we output a string that does not contain HTML tags on the screen.

In addition to the preg_replace() function, there are many other functions that can be used to remove HTML tags. For example, the strip_tags() function can also be used to remove HTML tags.

The syntax of the strip_tags() function is as follows:

$plain_text = strip_tags($html_string);
echo $plain_text;

The above code uses the strip_tags() function to remove all tags and output a text string to the screen.

In summary, regular expressions in PHP are very powerful tools that can be used to process various string operations. In this article, we learned how to extract plain text content from HTML string using preg_replace() function and strip_tags() function. Using regular expressions you can easily remove HTML tags and provide plain text content.

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