BBLOG PHP Syntax Highlighting Tutorial

March 30, 2005

I'll quickly describe how to get PHP Syntax highlighting using BBCode in your BBLOG application using GESHI (you can apply this same technique to any application). What we're going to do is enable our blog to support [ php] tags

Step 1.
Download Geshi from http://sourceforge.net/project/showfiles.php?group_id=114997

Step 2.
Unzip the files to your webdirectory that your blog is in. For example mine is located in litfuel.net/plush/bblog/bBlog_plugins/geshi/

Step 3.
open up the file modifier.bbcode.php script in bblog/bBlog_plugins/ folder. At the top of this file add the following
  1.  
  2. // this is the path to the geshi.php file yours will obviously be different so change this!
  3. $include_path = "/plush/bblog/bBlog_plugins/geshi/";
  4. 	
  5. // include main geshi file
  6. include_once($include_path."geshi.php");
  7.


Step 4.
Add this block of code RIGHT BEFORE THE RETURN statement in the smarty_modifier_bbcode function. So locate 
  1. return (nl2br($ret));
and add the code below right above it. 

  1.  
  2.       	/*------------------------------------------------------------------------------------------*/
  3. 	// Jim Plush Add on for PHP Syntax Highlighting questions? <a href="mailto:jiminoc@gmail.com">jiminoc@gmail.com</a>
  4. 	
  5. 	// CHECK FOR PHP TAGS
  6. 	$regex =  '/\[php\](.*?)\[\/php\]/si';
  7. 	
  8. 	// GRAB THE PHP CODE WE WANT TO HIGHLIGHT IN $matches[1]
  9. 	preg_match_all($regex, $ret, $matches);
  10. 	
  11. 	// set path to the geshi FILES folder - notice I have the double geshi now this is where the php.php file is located
  12. 	$path = "/litfuel.net/plush/bblog/bBlog_plugins/geshi/geshi/";
  13. 	
  14. 	// now we have to loop through all our matches because we can have multiple php brackets in our post
  15. 	$cnt = count($matches[1]);
  16. 	for($i=0; $i < $cnt; $i++)
  17. 	{
  18. 		// Create a GeSHi object where php is the language we want to use
  19. 		$geshi = new GeSHi($matches[1][$i], 'php', $path);
  20. 		
  21. 		// lets enable line numbers so people can comment based on the line
  22. 		$geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS); 
  23. 		
  24. 		$phpcode = $geshi->parse_code();
  25. 		
  26. 		$ret = str_replace($matches[0][$i], $phpcode , $ret);
  27. 			
  28. 	}
  29. 	/*------------------------------------------------------------------------------------------*/
  30.


thats it! now when you write in your blog whenever you want to use PHP Syntax Highlighting just put [ php ] my php stuff [/ php ] tags in and use the BBCode Entry Modifier :)
There are tons of advanced features you could add with geshi but I tried to keep it super simple for the moment.

This post was posted on March 30, 2005 in the following sections: Tutorials. There are currently 26 comments.

Comments

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  1. Anonymous says:
    May 12, 2005 @ 19:42 — Reply

    Cool. Have to check it out.

  2. johno says:
    June 2, 2005 @ 14:47 — Reply

    Have you tried fshl? FSHL? Supports multi-syntax highlighting, generates output really fast and has really nice stylesheet ;)

  3. slavka says:
    July 22, 2005 @ 00:31 — Reply

    I think the following works fine too.... all other steps keep the same apart from the php code parsing try the one below :) //************************************************************************** // php syntax... //************************************************************************** $regex = '/\[php\](.*?)\[\/php\]/si'; preg_match_all($regex, $ret, $matches); $path = "c:/apachefriends/xampp/htdocs/bblog/bblog/bBlog_plugins/geshi/geshi"; $cnt = count($matches[1]); for($i=0; $i $content .= $matches[1][$i]; if ($i == ($cnt-1)) { $replacethis = $matches[0][$i]; } else { $ret = str_replace($matches[0][$i], $i , $ret); } } $geshi = new GeSHi($content, 'PHP', $path); $geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS); $geshi->set_url_for_keyword_group('php', 'http://www.php.net/{FNAME}'); $phpcode = ''.$geshi->parse_code().''; $ret = str_replace($replacethis, $phpcode , $ret); //echo $phpcode; //**************************************************************************

  4. Anonymous says:
    July 22, 2005 @ 00:32 — Reply

    [php] //************************************************************************** // php syntax... //************************************************************************** $regex = '/\[php\](.*?)\[\/php\]/si'; preg_match_all($regex, $ret, $matches); $path = "c:/apachefriends/xampp/htdocs/bblog/bblog/bBlog_plugins/geshi/geshi"; $cnt = count($matches[1]); for($i=0; $i $content .= $matches[1][$i]; if ($i == ($cnt-1)) { $replacethis = $matches[0][$i]; } else { $ret = str_replace($matches[0][$i], $i , $ret); } } $geshi = new GeSHi($content, 'PHP', $path); $geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS); $geshi->set_url_for_keyword_group('php', 'http://www.php.net/{FNAME}'); $phpcode = ''.$geshi->parse_code().''; $ret = str_replace($replacethis, $phpcode , $ret); //echo $phpcode; //************************************************************************** [/php] :)

  5. Anonymous says:
    July 22, 2005 @ 00:33 — Reply

     <?php echo "hello world";function &_loadElement($event, $type, $args) { $type = strtolower($type); if (!HTML_QuickForm::isTypeRegistered($type)) { return PEAR::raiseError(null, QUICKFORM_UNREGISTERED_ELEMENT, null, E_USER_WARNING, "Element '$type' does not exist in HTML_QuickForm::_loadElement()", 'HTML_QuickForm_Error', true); } $className = $GLOBALS['HTML_QUICKFORM_ELEMENT_TYPES'][$type][1]; $includeFile = $GLOBALS['HTML_QUICKFORM_ELEMENT_TYPES'][$type][0]; include_once($includeFile); $elementObject =& new $className(); for ($i = 0; $i < 5; $i++) { if (!isset($args[$i])) { $args[$i] = null; } } $err = $elementObject->onQuickFormEvent($event, $args, $this); if ($err !== true) { return $err; } return $elementObject; } // end func _loadElement?>

  6. Anonymous says:
    July 22, 2005 @ 00:33 — Reply

    sorry for the multiple posts... but wish there was a php code allowance here :)

  7. Xenom says:
    April 27, 2006 @ 14:23 — Reply

    Has been a while ago you posted this. I was looking for something like this for weeks, about an hour ago i found GeSHI, but unfortunatly no 'BB' code support like [ php] [ /php]. This fixes it all :) Many thanks!

  8. Bert says:
    August 4, 2007 @ 10:44 — Reply

    There is no modifier.bbcode.php file included in the zip. I had to read the geshi-doc.txt file ("2.3: Basic Usage" section) to get it to work. Great script!

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