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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 |
|---|---|
| 523 | $plugin = $_wp_plugin_file; // Avoid stomping of the $plugin variable in a plugin. |
| 524 | |
| 525 | /** |
| 526 | * Fires once a single activated plugin has loaded. |
| 527 | * |
| 528 | * @since 5.1.0 |
| 529 | * |
| 530 | * @param string $plugin Full path to the plugin's main file. |
| 531 | */ |
| 532 | do_action( 'plugin_loaded', $plugin ); |
| 533 | } |
| 534 | unset( $plugin, $_wp_plugin_file ); |
| 535 | |
| 536 | // Load pluggable functions. |
| 537 | require ABSPATH . WPINC . '/pluggable.php'; |
| 538 | require ABSPATH . WPINC . '/pluggable-deprecated.php'; |
| 539 | |
| 540 | // Set internal encoding. |
| 541 | wp_set_internal_encoding(); |