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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 |
|---|---|
| 388 | * |
| 389 | * @param string $html HTML content for the image. |
| 390 | * @param int $id Attachment ID. |
| 391 | * @param string $alt Alternate text. |
| 392 | * @param string $title Attachment title. |
| 393 | * @param string $align Part of the class name for aligning the image. |
| 394 | * @param string|array $size Size of image. Image size or array of width and height values (in that order). |
| 395 | * Default 'medium'. |
| 396 | */ |
| 397 | return apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * Calculates the new dimensions for a down-sampled image. |
| 402 | * |
| 403 | * If either width or height are empty, no constraint is applied on |
| 404 | * that dimension. |
| 405 | * |
| 406 | * @since 2.5.0 |