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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 |
|---|---|
| 3189 | |
| 3190 | /** |
| 3191 | * Filter the URI of a WordPress admin CSS file. |
| 3192 | * |
| 3193 | * @since 2.3.0 |
| 3194 | * |
| 3195 | * @param string $_file Relative path to the file with query arguments attached. |
| 3196 | * @param string $file Relative path to the file, minus its ".css" extension. |
| 3197 | */ |
| 3198 | return apply_filters( 'wp_admin_css_uri', $_file, $file ); |
| 3199 | } |
| 3200 | |
| 3201 | /** |
| 3202 | * Enqueues or directly prints a stylesheet link to the specified CSS file. |
| 3203 | * |
| 3204 | * "Intelligently" decides to enqueue or to print the CSS file. If the |
| 3205 | * 'wp_print_styles' action has *not* yet been called, the CSS file will be |
| 3206 | * enqueued. If the wp_print_styles action *has* been called, the CSS link will |
| 3207 | * be printed. Printing may be forced by passing true as the $force_echo |