How to Remove the Style Attribute from HTML Tags with PHP's preg_replace()?

Removing the Style Attribute from HTML Tags with PHP's preg_replace() Function

Problem:

In an HTML string obtained from TinyMCE, it is necessary to remove the style attribute from all tags. Specifically, tags should be transformed from

to

.

Solution Using preg_replace():

For this task, the following regular expression will effectively capture the unwanted style attribute:

(<[^>]+)>

This expression matches the following sections of the tag:

• (<¹ ): Represents the opening < bracket followed by one or more characters other than > until encountering a space.
• style=".*?": Matches the style="..." attribute.

To remove this unwanted attribute, use the preg_replace() function as follows:

$output = preg_replace('/(<[^>]+)>

Here's a breakdown of the code:

• '/(<¹ )> Specifies the regular expression to match the style attribute. The /i flag ensures case insensitivity.
• '$1': Replaces the matched text with the captured group $1, which contains the tag without the style attribute.

This code will effectively remove the style attribute from HTML tags while preserving the rest of the tag structure.