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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 |
|---|---|
| 3510 | |
| 3511 | /** |
| 3512 | * Filters the size of the file. |
| 3513 | * |
| 3514 | * @since 6.0.0 |
| 3515 | * |
| 3516 | * @param int $size The result of PHP filesize on the file. |
| 3517 | * @param string $path Path to the file. |
| 3518 | */ |
| 3519 | return (int) apply_filters( 'wp_filesize', $size, $path ); |
| 3520 | } |
| 3521 | |
| 3522 | /** |
| 3523 | * Retrieves the list of allowed mime types and file extensions. |
| 3524 | * |
| 3525 | * @since 2.8.6 |
| 3526 | * |
| 3527 | * @param int|WP_User $user Optional. User to check. Defaults to current user. |
| 3528 | * @return string[] Array of mime types keyed by the file extension regex corresponding |