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HTML to Plain Text

/ Published in: PHP
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This function takes HTML input and converts it to plain text. It needs improvement so that it converts multiple blank lines to a single blank line and converts an <a ... > link to the markup equivalent (same for images). It should be rewritten to using a DOM/XML parser.

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  1. function html_to_plain($html) {
  2.     $plain_message = str_replace(array('<br />', '<br>', '<p>', '</p>', '</title>'), "\n", $html);
  3. 		  $plain_message = str_replace(array("<table>", "</tr></table>"), "\n============", $plain_message);
  4. 		  $plain_message = str_replace("<tr>", "| ", $plain_message);
  5. 		  $plain_message = str_replace("</tr>", "\n-------------", $plain_message);
  6. 		  $plain_message = str_replace(array("<title>", '<h1>'),  "# ", $plain_message);
  7. 		  $plain_message = str_replace(array('<th>'), "__", $plain_message);
  8. 		  $plain_message = str_replace(array('</th>'), "__ | ", $plain_message);
  9. 		  $plain_message = str_replace(array('</td>'), " | ", $plain_message);
  10. 		  $plain_message = str_replace(array('<strong>', '</strong>'), '__', $plain_message);
  11. 		  $plain_message = str_replace(array('<em>', '</em>'), '_', $plain_message);
  12. 		  $plain_message = str_replace(array('<a'), '[', $plain_message);
  13. 		  $plain_message = str_replace(array('href="'), '](', $plain_message);
  14. 		  $plain_message = str_replace(array('<img src="'), '[', $plain_message);
  15. 		  $plain_message = str_replace(array('alt='), '', $plain_message);
  16. 		  $plain_message = str_replace(array('/>'), ']', $plain_message);
  17. 		  $plain_message = strip_tags($plain_message);
  18. 		  //$plain_message = str_replace("  ", ' ', $plain_message);
  19. 		  $plain_message = preg_replace('|(?mi-Us)[  ]{2,}|', ' ', $plain_message);
  20.  
  21.         return $plain_message ;
  22. }

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