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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 |
|---|---|
| 417 | * |
| 418 | * @param string $html HTML content for the image. |
| 419 | * @param int $id Attachment ID. |
| 420 | * @param string $alt Image description for the alt attribute. |
| 421 | * @param string $title Image description for the title attribute. |
| 422 | * @param string $align Part of the class name for aligning the image. |
| 423 | * @param string|int[] $size Requested image size. Can be any registered image size name, or |
| 424 | * an array of width and height values in pixels (in that order). |
| 425 | */ |
| 426 | return apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * Calculates the new dimensions for a down-sampled image. |
| 431 | * |
| 432 | * If either width or height are empty, no constraint is applied on |
| 433 | * that dimension. |
| 434 | * |
| 435 | * @since 2.5.0 |