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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 2388 | * @param string $avatar HTML for the user's avatar. Default null. |
| 2389 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash, |
| 2390 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 2391 | * @param array $args Arguments passed to get_avatar_url(), after processing. |
| 2392 | */ |
| 2393 | $avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args ); |
| 2394 | |
| 2395 | if ( ! is_null( $avatar ) ) { |
| 2396 | /** This filter is documented in wp-includes/pluggable.php */ |
| 2397 | return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args ); |
| 2398 | } |
| 2399 | |
| 2400 | if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) { |
| 2401 | return false; |
| 2402 | } |
| 2403 | |
| 2404 | $url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) ); |
| 2405 | |
| 2406 | $args = get_avatar_data( $id_or_email, $args ); |
| Line | Code |
| 2446 | * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash, |
| 2447 | * user email, WP_User object, WP_Post object, or WP_Comment object. |
| 2448 | * @param int $size Square avatar width and height in pixels to retrieve. |
| 2449 | * @param string $default URL for the default image or a default type. Accepts '404', 'retro', 'monsterid', |
| 2450 | * 'wavatar', 'indenticon','mystery' (or 'mm', or 'mysteryman'), 'blank', or 'gravatar_default'. |
| 2451 | * Default is the value of the 'avatar_default' option, with a fallback of 'mystery'. |
| 2452 | * @param string $alt Alternative text to use in the avatar image tag. Default empty. |
| 2453 | * @param array $args Arguments passed to get_avatar_data(), after processing. |
| 2454 | */ |
| 2455 | return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args ); |
| 2456 | } |
| 2457 | endif; |
| 2458 | |
| 2459 | if ( !function_exists( 'wp_text_diff' ) ) : |
| 2460 | /** |
| 2461 | * Displays a human readable HTML representation of the difference between two strings. |
| 2462 | * |
| 2463 | * The Diff is available for getting the changes between versions. The output is |
| 2464 | * HTML, so the primary use is for displaying the changes. If the two strings |