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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 |
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213 |
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214 | /** |
215 | * Filters the image sizes generated for non-image mime types. |
216 | * |
217 | * @since 4.7.0 |
218 | * |
219 | * @param array $fallback_sizes An array of image size names. |
220 | * @param array $metadata Current attachment metadata. |
221 | */ |
222 | $fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata ); |
223 |
|
224 | $sizes = array(); |
225 | $_wp_additional_image_sizes = wp_get_additional_image_sizes(); |
226 |
|
227 | foreach ( $fallback_sizes as $s ) { |
228 | if ( isset( $_wp_additional_image_sizes[ $s ]['width'] ) ) { |
229 | $sizes[ $s ]['width'] = intval( $_wp_additional_image_sizes[ $s ]['width'] ); |
230 | } else { |
231 | $sizes[ $s ]['width'] = get_option( "{$s}_size_w" ); |