PHP : Strip HTML and PHP tags from a string.

README.md

strip_html

(PHP 5 >= 5.4)
strip_html — Strip HTML and PHP tags from a string.

Description

string strip_html( string $str )

This function tries to return a string with all NULL bytes, HTML and PHP tags stripped from a given str. Unlike strip_tags(), this function is mindful of line-breaks and metadata elements (e.g., <style>).

This function is useful for converting a HTML-rich string into a plain-text string for emails.

Parameters

• str — The input string.

Return Values

Returns the stripped string.

Installation

With Composer

$ composer require mcaskill/php-strip-html

Without Composer

Why are you not using composer? Download Function.Strip-HTML.php from the gist and save the file into your project path somewhere.

composer.json

{
  "name": "mcaskill/php-strip-html",
  "description": "Strip HTML and PHP tags from a string.",
  "license": "MIT",
  "authors": [
    {
      "name": "Chauncey McAskill",
      "email": "chauncey@mcaskill.ca",
      "homepage": "https://github.com/mcaskill"
    }
  ],
  "keywords": [
    "function"
  ],
  "extra": {
    "branch-alias": {
      "dev-master": "1.x-dev"
    }
  },
  "require": {
    "php": ">=5.4.0"
  },
  "autoload": {
    "files": ["Function.Strip-HTML.php"]
  }
}

Function.Strip-HTML.php

<?php

if (!function_exists('strip_html')) {
	/**
	 * Strip HTML and PHP tags from a string.
	 *
	 * @param  string $str The input string.
	 * @return string Returns the stripped string.
	 */
	function strip_html($str)
	{
		$str = html_entity_decode($str);

		// Strip HTML
		$str = preg_replace('#<br[^>]*?>#siu', "\n", $str);
		$str = preg_replace(
			[
				'#<head[^>]*?>.*?</head>#siu',
				'#<style[^>]*?>.*?</style>#siu',
				'#<script[^>]*?.*?</script>#siu',
				'#<object[^>]*?.*?</object>#siu',
				'#<embed[^>]*?.*?</embed>#siu',
				'#<applet[^>]*?.*?</applet>#siu',
				'#<noframes[^>]*?.*?</noframes>#siu',
				'#<noscript[^>]*?.*?</noscript>#siu',
				'#<noembed[^>]*?.*?</noembed>#siu'
			],
			'',
			$str
		);
		$str = strip_tags($str);

		// Trim whitespace
		$str = str_replace("\t", '', $str);
		$str = preg_replace('#\n\r|\r\n#', "\n", $str);
		$str = preg_replace('#\n{3,}#', "\n\n", $str);
		$str = trim($str);

		return $str;
	}
}

Very nice piece of code. For me, this was an improvement! What do you think?

  #$string = str_replace("\t", '', $string);
  #$string = preg_replace('#\n\r|\r\n#', PHP_EOL, $string);
  #$string = preg_replace('#\n{3,}#', PHP_EOL.PHP_EOL, $string);
  $string = preg_replace("#(\s*[\r\n]\s*)+#", PHP_EOL, $string); // remove tabs, double space and linebreak to one LB
  $string = trim($string, ' '.chr(194).chr(160));                // trim all types of spaces