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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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356 | // Add the meta-data |
357 | wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) ); |
358 | update_post_meta( $id, '_wp_attachment_is_custom_background', get_option('stylesheet' ) ); |
359 |
|
360 | set_theme_mod('background_image', esc_url($url)); |
361 |
|
362 | $thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' ); |
363 | set_theme_mod('background_image_thumb', esc_url( $thumbnail[0] ) ); |
364 |
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365 | do_action('wp_create_file_in_uploads', $file, $id); // For replication |
366 | $this->updated = true; |
367 | } |
368 |
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369 | } |
370 | ?> |
371 |
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