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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 |
|---|---|
| 4067 | * effectively short circuit get_avatar_data(), passing the value through |
| 4068 | * the {@see 'get_avatar_data'} filter and returning early. |
| 4069 | * |
| 4070 | * @since 4.2.0 |
| 4071 | * |
| 4072 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 4073 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash, |
| 4074 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 4075 | */ |
| 4076 | $args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email ); |
| 4077 | |
| 4078 | if ( isset( $args['url'] ) ) { |
| 4079 | /** This filter is documented in wp-includes/link-template.php */ |
| 4080 | return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
| 4081 | } |
| 4082 | |
| 4083 | $email_hash = ''; |
| 4084 | $user = $email = false; |
| 4085 | |