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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 |
|---|---|
| 2666 | |
| 2667 | /** |
| 2668 | * Filters whether to invalidate a file from the opcode cache. |
| 2669 | * |
| 2670 | * @since 5.5.0 |
| 2671 | * |
| 2672 | * @param bool $will_invalidate Whether WordPress will invalidate `$filepath`. Default true. |
| 2673 | * @param string $filepath The path to the PHP file to invalidate. |
| 2674 | */ |
| 2675 | if ( apply_filters( 'wp_opcache_invalidate_file', true, $filepath ) ) { |
| 2676 | return opcache_invalidate( $filepath, $force ); |
| 2677 | } |
| 2678 | |
| 2679 | return false; |
| 2680 | } |
| 2681 | |
| 2682 | /** |
| 2683 | * Attempts to clear the opcode cache for a directory of files. |
| 2684 | * |