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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 |
|---|---|
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Filter Twenty Seventeen content width of the theme. |
| 249 | * |
| 250 | * @since Twenty Seventeen 1.0 |
| 251 | * |
| 252 | * @param int $content_width Content width in pixels. |
| 253 | */ |
| 254 | $GLOBALS['content_width'] = apply_filters( 'twentyseventeen_content_width', $content_width ); |
| 255 | } |
| 256 | add_action( 'template_redirect', 'twentyseventeen_content_width', 0 ); |
| 257 | |
| 258 | /** |
| 259 | * Register custom fonts. |
| 260 | */ |
| 261 | function twentyseventeen_fonts_url() { |
| 262 | $fonts_url = ''; |
| 263 | |