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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 442 | if ( is_dir( WPMU_PLUGIN_DIR ) ) { |
| 443 | if ( $dh = opendir( WPMU_PLUGIN_DIR ) ) { |
| 444 | while ( ( $plugin = readdir( $dh ) ) !== false ) { |
| 445 | if ( substr( $plugin, -4 ) == '.php' ) { |
| 446 | include_once( WPMU_PLUGIN_DIR . '/' . $plugin ); |
| 447 | } |
| 448 | } |
| 449 | } |
| 450 | } |
| 451 | do_action('muplugins_loaded'); |
| 452 | |
| 453 | /** |
| 454 | * Used to guarantee unique hash cookies |
| 455 | * @since 1.5 |
| 456 | */ |
| 457 | define('COOKIEHASH', md5(get_option('siteurl'))); |
| 458 | |
| 459 | /** |
| 460 | * Should be exactly the same as the default value of SECRET_KEY in wp-config-sample.php |