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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 |
|---|---|
| 151 | * @uses apply_filters() Calls 'template_directory_uri' filter on template directory URI path and template name. |
| 152 | * |
| 153 | * @return string Template directory URI. |
| 154 | */ |
| 155 | function get_template_directory_uri() { |
| 156 | $template = get_template(); |
| 157 | $theme_root_uri = get_theme_root_uri( $template ); |
| 158 | $template_dir_uri = "$theme_root_uri/$template"; |
| 159 | |
| 160 | return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri ); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Retrieve theme data from parsed theme file. |
| 165 | * |
| 166 | * The description will have the tags filtered with the following HTML elements |
| 167 | * whitelisted. The <b>'a'</b> element with the <em>href</em> and <em>title</em> |
| 168 | * attributes. The <b>abbr</b> element with the <em>title</em> attribute. The |
| 169 | * <b>acronym<b> element with the <em>title</em> attribute allowed. The |