tyxla /
WP-Hydra
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| 1 | <?php |
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| 2 | /** |
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| 3 | * Plugin Name: WP Hydra |
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| 4 | * Plugin URI: https://wordpress.org/plugins/wp-hydra/ |
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| 5 | * Description: Allows one WordPress installation to be resolved and browsed at multiple domains. |
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| 6 | * Version: 1.0.4 |
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| 7 | * Author: tyxla |
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| 8 | * Author URI: http://marinatanasov.com/ |
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| 9 | * Plugin URI: https://github.com/tyxla/WP-Hydra |
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| 10 | * License: GPL2 |
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| 11 | * Requires at least: 3.0.1 |
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| 12 | * Tested up to: 4.4 |
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| 13 | */ |
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| 14 | |||
| 15 | /** |
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| 16 | * Main WP_Hydra class. |
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| 17 | * |
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| 18 | * Replaces the original domain with the current domain, where necessary. |
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| 19 | * All of the magic is hooked upon WP_Hydra object initialization. |
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| 20 | */ |
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| 21 | class WP_Hydra { |
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| 22 | |||
| 23 | /** |
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| 24 | * Constructor. |
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| 25 | * |
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| 26 | * Hooks all of the domain replacement functionality. |
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| 27 | * |
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| 28 | * @access public |
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| 29 | */ |
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| 30 | public function __construct() { |
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| 31 | // modify domain where necessary |
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| 32 | add_filter('option_blogname', array($this, 'setup_domain'), 1); |
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| 33 | add_filter('option_siteurl', array($this, 'setup_domain'), 1); |
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| 34 | add_filter('option_home', array($this, 'setup_domain'), 1); |
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| 35 | add_filter('stylesheet_uri', array($this, 'setup_domain'), 1); |
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| 36 | add_filter('stylesheet_directory_uri', array($this, 'setup_domain'), 1); |
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| 37 | add_filter('template_directory_uri', array($this, 'setup_domain'), 1); |
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| 38 | add_filter('plugins_url', array($this, 'setup_domain'), 1); |
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| 39 | |||
| 40 | // replace occurences in content |
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| 41 | add_filter('the_content', array($this, 'setup_content')); |
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| 42 | |||
| 43 | // replace occurences in widget text |
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| 44 | add_filter('widget_text', array($this, 'setup_content')); |
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| 45 | |||
| 46 | // replace occurences in wp_upload_dir(); |
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| 47 | add_filter('upload_dir', array($this, 'setup_upload_dir')); |
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| 48 | |||
| 49 | // allow developers to support multiple domains in fields that contain only a site URL |
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| 50 | add_filter('wp_hydra_domain', array($this, 'setup_domain')); |
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| 51 | |||
| 52 | // allow developers to support URLs with multiple domains in their content |
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| 53 | add_filter('wp_hydra_content', array($this, 'setup_content')); |
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| 54 | } |
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| 55 | |||
| 56 | /** |
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| 57 | * Replaces original domain with current domain in simple fields. |
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| 58 | * |
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| 59 | * @access public |
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| 60 | * |
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| 61 | * @param string $url The current URL. |
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| 62 | * @return string $url The URL with the (maybe) replaced domain. |
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| 63 | */ |
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| 64 | public function setup_domain($url) { |
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| 65 | // parse current URL |
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| 66 | $original_domain_parts = parse_url($url); |
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| 67 | |||
| 68 | // if unable to retrieve the host, skip |
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| 69 | if (empty($original_domain_parts['host'])) { |
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| 70 | return $url; |
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| 71 | } |
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| 72 | |||
| 73 | // get original and current domain |
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| 74 | $original_domain = $original_domain_parts['host']; |
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| 75 | $current_domain = $_SERVER['HTTP_HOST']; |
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| 76 | |||
| 77 | // if original and current domain match, skip |
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| 78 | if ($original_domain == $current_domain) { |
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| 79 | return $url; |
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| 80 | } |
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| 81 | |||
| 82 | // prepare original domain and current domain with the current protocol |
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| 83 | $protocols = array('http://', 'https://'); |
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| 84 | $current_protocol = (is_ssl() ? 'https' : 'http') . '://'; |
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| 85 | foreach ($protocols as $protocol) { |
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| 86 | $original_base = $protocol . $original_domain; |
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| 87 | $new_base = $current_protocol . $current_domain; |
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| 88 | |||
| 89 | // replace original domain with current domain |
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| 90 | $url = str_replace($original_base, $new_base, $url); |
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| 91 | } |
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| 92 | |||
| 93 | return $url; |
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| 94 | } |
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| 95 | |||
| 96 | /** |
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| 97 | * Replaces original domain with current domain in content. |
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| 98 | * |
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| 99 | * @access public |
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| 100 | * |
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| 101 | * @param string $content The current content with the original domain. |
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| 102 | * @return string $content The content with the new domain. |
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| 103 | */ |
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| 104 | public function setup_content($content) { |
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| 105 | // get original home URL |
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| 106 | remove_filter('option_home', array($this, 'setup_domain'), 1); |
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| 107 | $original_home = home_url('/'); |
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| 108 | add_filter('option_home', array($this, 'setup_domain'), 1); |
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| 109 | |||
| 110 | // get current home URL |
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| 111 | $current_home = home_url('/'); |
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| 112 | |||
| 113 | // replace occurences of original URL with current home URL |
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| 114 | $content = str_replace($original_home, $current_home, $content); |
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| 115 | |||
| 116 | return $content; |
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| 117 | } |
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| 118 | |||
| 119 | /** |
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| 120 | * Replaces original domain with current domain in wp_upload_dir(). |
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| 121 | * |
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| 122 | * @access public |
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| 123 | * |
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| 124 | * @param array $upload_dir The current upload dir settings with the original domain. |
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| 125 | * @return array $upload_dir The upload dir settings with the new domain. |
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| 126 | */ |
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| 127 | public function setup_upload_dir($upload_dir) { |
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| 128 | // keys of array element that we'll be updating |
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| 129 | $keys_to_update = array( |
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| 130 | 'url', |
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| 131 | 'baseurl', |
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| 132 | ); |
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| 133 | |||
| 134 | // fix all targeted array elements |
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| 135 | foreach ($keys_to_update as $key) { |
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| 136 | $upload_dir[$key] = apply_filters('wp_hydra_domain', $upload_dir[$key]); |
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| 137 | } |
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| 138 | |||
| 139 | return $upload_dir; |
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| 140 | } |
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| 141 | |||
| 142 | } |
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| 143 | |||
| 144 | // initialize WP Hydra - Polycephaly FTW! |
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| 145 | global $wp_hydra; |
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| 146 | $wp_hydra = new WP_Hydra(); |
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.