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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 |
|---|---|
| 74 | case 'option' : |
| 75 | if ( empty( $this->id_data[ 'keys' ] ) ) |
| 76 | add_filter( 'pre_option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) ); |
| 77 | else { |
| 78 | add_filter( 'option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) ); |
| 79 | add_filter( 'default_option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) ); |
| 80 | } |
| 81 | break; |
| 82 | default : |
| 83 | do_action( 'customize_preview_' . $this->id ); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Callback function to filter the theme mods and options. |
| 89 | * |
| 90 | * @since 3.4.0 |
| 91 | * @uses WP_Customize_Setting::multidimensional_replace() |
| 92 | * |