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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 |
|---|---|
| 2625 | |
| 2626 | /** |
| 2627 | * Filters whether to invalidate a file from the opcode cache. |
| 2628 | * |
| 2629 | * @since 5.5.0 |
| 2630 | * |
| 2631 | * @param bool $will_invalidate Whether WordPress will invalidate `$filepath`. Default true. |
| 2632 | * @param string $filepath The path to the PHP file to invalidate. |
| 2633 | */ |
| 2634 | if ( apply_filters( 'wp_opcache_invalidate_file', true, $filepath ) ) { |
| 2635 | return opcache_invalidate( $filepath, $force ); |
| 2636 | } |
| 2637 | |
| 2638 | return false; |
| 2639 | } |
| 2640 | |
| 2641 | /** |
| 2642 | * Attempts to clear the opcode cache for a directory of files. |
| 2643 | * |