asked on

Manipulating wordpress plugin, regex mod possibly?

I am trying to modify embediframe plugin for word press. currently this plugin allows the users to enter [iframe url height width] in a page or post and it displays the iframe.

I would like to modify this plugin so the user only has to enter [url] and the iframe displays.

I am not going to be modifying the height and width of the iframe so these parameters are not neccessary nor desired. attached is the plugin code. i am not familiar enough with the preg_replace_callback function or regex or php for that matter.

any help will be greatly appreciated.

thanks!

<?php
include (dirname (__FILE__).'/plugin.php');
 
class EmbedIframe extends EmbedIframe_Plugin
{
	function EmbedIframe ()
	{
		$this->register_plugin ('embediframe', __FILE__);
		
		$this->add_filter ('the_content');
		$this->add_action ('wp_head');
	}
	
	function wp_head ()
	{
		
	}
	
	function replace ($matches)
	{
		$tmp = strpos ($matches[1], ' ');
		if ($tmp)
		{
			// Because the regex is such a nuisance
			$url  = substr ($matches[1], 0, $tmp);
			$rest = substr ($matches[1], strlen ($url));
			
			$width  = 800;
			$height = 875;
 
				$parts = array_values (array_filter (explode (' ', $rest)));
				$width = $parts[0];
				unset ($parts[0]);
				$height = implode (' ', $parts);
                       
			
			return $this->capture ('iframe', array ('url' => $url, 'width' => $width, 'height' => $height));
		}
		
		return '';
	}
 
	function the_content ($text)
	{
	  return preg_replace_callback ("@(?:<p>\s*)?\[iframe\s*(.*?)\](?:\s*</p>)?@", array (&$this, 'replace'), $text);
 
	}
}
 
$embediframe = new EmbedIframe;
?>

Open in new window

James Rodgers

try replacing the embediframe.php with this

lets you set a default max size, so users can make it smaller if they want, but if no size is specified or a size larger than you will allow it eill default to the max size

<?php
/*
Plugin Name: Embed Iframe
Plugin URI: http://blog.deskera.com/wordpress-plugin-embed-iframe
Description: Allows the insertion of code to display an external webpage within an iframe. The tag to insert the code is: <code>[iframe url width height]</code>
Version: 1.0
Author: Deskera
Author URI: http://deskera.com

1.0 - Initial release
*/

$iMaxHeight = 600;
$iMaxWidth = 300;

include (dirname (__FILE__).'/plugin.php');

class EmbedIframe extends EmbedIframe_Plugin
{
 function EmbedIframe ()
 {
 $this->register_plugin ('embediframe', __FILE__);

 $this->add_filter ('the_content');
 $this->add_action ('wp_head');
 }

 function wp_head ()
 {

 }

 function replace ($matches)
 {
 $tmp = strpos ($matches[1], ' ');
 if ($tmp)
 {
 // Because the regex is such a nuisance
 $url = substr ($matches[1], 0, $tmp);
 $rest = substr ($matches[1], strlen ($url));

 $width = 100;
 $height = 200;


 $parts = array_values (array_filter (explode (' ', $rest)));
 $width = $parts[0];

 unset ($parts[0]);
 $height = implode (' ', $parts);


 return $this->capture ('iframe', array ('url' => $url, 'width' => ($width && $width<=$iMaxWidth ? $width : $iMaxWidth ), 'height' => ($height && $height<=$iMaxHeight ? $height : $iMaxHeight )));
 }

 return '';
 }

 function the_content ($text)
 {
 return preg_replace_callback ("@(?:\s*)?\[iframe\s*(.*?)\](?:\s*)?@", array (&$this, 'replace'), $text);
 }
}

$embediframe = new EmbedIframe;
?>

thtate

ASKER

This is great so far, i did notice however , that if you dont enter a number or a space after the url, it breaks it, you have to at least leave a space before the closing bracet. is there a way to eliminate the need to leave a space after the url and also elimate the text "iframe" after the first bracet? so the code you are typing in the post would look like:

[http://youriframeurl.com]

thank you so much for your help!

James Rodgers

not teh most elegant, but try this

<?php
/*
Plugin Name: Embed Iframe
Plugin URI: http://blog.deskera.com/wordpress-plugin-embed-iframe
Description: Allows the insertion of code to display an external webpage within an iframe. The tag to insert the code is: <code>[iframe url width height]</code>
Version: 1.0
Author: Deskera
Author URI: http://deskera.com

1.0 - Initial release
*/

include (dirname (__FILE__).'/plugin.php');

class EmbedIframe extends EmbedIframe_Plugin
{

 function EmbedIframe ()
 {
 $this->register_plugin ('embediframe', __FILE__);

 $this->add_filter ('the_content');
 $this->add_action ('wp_head');
 }

 function wp_head ()
 {

 }

 function replace ($matches)
 {
 $iDefHeight = 100;
 $iDefWidth = 200;

 $iMaxHeight = 600;
 $iMaxWidth = 500;
 $tmp = strpos ($matches[1], ' ');
 if(!$tmp){
 $tmp = $matches[1];
 $url=$tmp;
 $rest='';
 }

 if ($tmp)
 {
 // Because the regex is such a nuisance
 if(!isset($url)){
 $url = substr ($matches[1], 0, $tmp);
 }
 if(!isset($rest)){
 $rest = substr ($matches[1], strlen ($url));
 }
 $height = $iMaxHeight;
 $width = $iMaxWidth;
 $parts = array_values (array_filter (explode (' ', $rest)));
 if($parts[0]){
 $width = ($parts[0]< $iMaxWidth ? $parts[0] : $iMaxWidth) ;
 }

 if($parts[1]){
 $height = ($parts[1]< $iMaxHeight ? $parts[1] : $iMaxHeight) ;
 }
 echo " h:".$height." w:".$width;

 return $this->capture ('iframe', array ('url' => $url, 'width' => $width, 'height' => $height));
 }

 return '';
 }

 function the_content ($text)
 {
 return preg_replace_callback ("@(?:\s*)?\[iframe\s*(.*?)\](?:\s*)?@", array (&$this, 'replace'), $text);
 }
}

$embediframe = new EmbedIframe;
?>

ASKER CERTIFIED SOLUTION

James Rodgers

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

James Rodgers

glad i could help

thanks for the points