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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 |
|---|---|
| 29 | * Fires before the header template file is loaded. |
| 30 | * |
| 31 | * @since 2.1.0 |
| 32 | * @since 2.8.0 The `$name` parameter was added. |
| 33 | * @since 5.5.0 The `$args` parameter was added. |
| 34 | * |
| 35 | * @param string|null $name Name of the specific header file to use. Null for the default header. |
| 36 | * @param array $args Additional arguments passed to the header template. |
| 37 | */ |
| 38 | do_action( 'get_header', $name, $args ); |
| 39 | |
| 40 | $templates = array(); |
| 41 | $name = (string) $name; |
| 42 | if ( '' !== $name ) { |
| 43 | $templates[] = "header-{$name}.php"; |
| 44 | } |
| 45 | |
| 46 | $templates[] = 'header.php'; |
| 47 | |