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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 |
|---|---|
| 3551 | |
| 3552 | /** |
| 3553 | * Filters the size of the file. |
| 3554 | * |
| 3555 | * @since 6.0.0 |
| 3556 | * |
| 3557 | * @param int $size The result of PHP filesize on the file. |
| 3558 | * @param string $path Path to the file. |
| 3559 | */ |
| 3560 | return (int) apply_filters( 'wp_filesize', $size, $path ); |
| 3561 | } |
| 3562 | |
| 3563 | /** |
| 3564 | * Retrieves the list of allowed mime types and file extensions. |
| 3565 | * |
| 3566 | * @since 2.8.6 |
| 3567 | * |
| 3568 | * @param int|WP_User $user Optional. User to check. Defaults to current user. |
| 3569 | * @return string[] Array of mime types keyed by the file extension regex corresponding |