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Source View: customize_preview_{$this->id}

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

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       *