WP Junction fix

junction-fix.php

<?php
/*
Plugin Name: Junction fixes for plugins
Plugin URI: http://interconnectit.com/
Description: Junctioning files into the WordPess plug-ins folder causes problems with php 5.3 for plugin_url, this tries to fix it. Place in the wp-content/mu-plugins folder so it loads before all other plugins.
Author: James R Whitehead
Version: 0.0.0.0.0.0.2
Author URI: http://interconnectit.com
*/


class fix_junctions {

	var $paths = array( );

	function fix_junctions() {
		if ( defined( 'WP_PLUGIN_DIR' ) && defined( 'WP_PLUGIN_URL' ) ) {
			add_filter( 'plugins_url', array( &$this, 'plugins_url' ), 10, 3 );
			$this->real_paths( WP_PLUGIN_DIR );
		}
	}


	function real_paths( $plugins_dir = '' ) {
		$plugins_dir = $this->clean_win32_path( $plugins_dir );

		if ( $dir = opendir( $plugins_dir ) ) {
			while( $file = readdir( $dir ) ) {
				if ( ! is_dir( $plugins_dir . '/' . $file ) || $file == '' || $file == '..' || $file == '.' )
					continue;

				$p1 = $plugins_dir . '/' . $file;
				$p2 = $this->clean_win32_path( realpath( $plugins_dir . '/' . $file ) );

				if ( $p1 != $p2 ) // We've found a junction, store the localised name.
					$this->paths[ $p2 ] = $p1;
			}
		}
	}


	function plugins_url( $url = '', $path = '', $plugin = '') {

		$wp_plugin_dir = $this->clean_win32_path( WP_PLUGIN_DIR );

		// Something isn't quite right, guessing it's a junction
		if ( stristr( $plugin, $wp_plugin_dir ) === false && isset( $this->paths[ dirname( $plugin ) ] ) )
			$url = plugins_url( $path, $this->paths[ dirname( $plugin ) ] . '/' . basename( $plugin ) );

		return $url;
	}


	function clean_win32_path( $path = '' ) {
		$path = str_replace( '\\', '/', $path ); // sanitize for Win32 installs
		$path = preg_replace( '|/+|', '/', $path );
		return $path;
	}

}

new fix_junctions();