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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 |
|---|---|
| 3573 | * Passing a non-null value in the 'url' member of the return array will |
| 3574 | * effectively short circuit get_avatar_data(), passing the value through |
| 3575 | * the {@see 'get_avatar_data'} filter and returning early. |
| 3576 | * |
| 3577 | * @since 4.2.0 |
| 3578 | * |
| 3579 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 3580 | * @param int|object|string $id_or_email A user ID, email address, or comment object. |
| 3581 | */ |
| 3582 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 3583 | |
| 3584 | if ( isset( $args['url'] ) && ! is_null( $args['url'] ) ) { |
| 3585 | /** This filter is documented in wp-includes/link-template.php */ |
| 3586 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 3587 | } |
| 3588 | |
| 3589 | $email_hash = ''; |
| 3590 | $user = $email = false; |
| 3591 | |