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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 |
|---|---|
| 760 | |
| 761 | /** |
| 762 | * Filters the list of intermediate image sizes. |
| 763 | * |
| 764 | * @since 2.5.0 |
| 765 | * |
| 766 | * @param array $image_sizes An array of intermediate image sizes. Defaults |
| 767 | * are 'thumbnail', 'medium', 'medium_large', 'large'. |
| 768 | */ |
| 769 | return apply_filters( 'intermediate_image_sizes', $image_sizes ); |
| 770 | } |
| 771 | |
| 772 | /** |
| 773 | * Retrieve an image to represent an attachment. |
| 774 | * |
| 775 | * A mime icon for files, thumbnail or intermediate size for images. |
| 776 | * |
| 777 | * The returned array contains four values: the URL of the attachment image src, |
| 778 | * the width of the image file, the height of the image file, and a boolean |