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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 |
|---|---|
| 4801 | /** |
| 4802 | * Filters the available devices to allow previewing in the Customizer. |
| 4803 | * |
| 4804 | * @since 4.5.0 |
| 4805 | * |
| 4806 | * @see WP_Customize_Manager::get_previewable_devices() |
| 4807 | * |
| 4808 | * @param array $devices List of devices with labels and default setting. |
| 4809 | */ |
| 4810 | $devices = apply_filters( 'customize_previewable_devices', $devices ); |
| 4811 | |
| 4812 | return $devices; |
| 4813 | } |
| 4814 | |
| 4815 | /** |
| 4816 | * Register some default controls. |
| 4817 | * |
| 4818 | * @since 3.4.0 |
| 4819 | */ |