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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 |
---|---|
175 | // @link: http://core.trac.wordpress.org/ticket/20027 |
176 | add_filter( 'pre_option_stylesheet', array( $this, 'get_stylesheet' ) ); |
177 | add_filter( 'pre_option_template', array( $this, 'get_template' ) ); |
178 |
|
179 | // Handle custom theme roots. |
180 | add_filter( 'pre_option_stylesheet_root', array( $this, 'get_stylesheet_root' ) ); |
181 | add_filter( 'pre_option_template_root', array( $this, 'get_template_root' ) ); |
182 | } |
183 |
|
184 | do_action( 'start_previewing_theme', $this ); |
185 | } |
186 |
|
187 | /** |
188 | * Stop previewing the selected theme. |
189 | * |
190 | * Removes filters to change the current theme. |
191 | * |
192 | * @since 3.4.0 |
193 | */ |