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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 |
|---|---|
| 3428 | |
| 3429 | /** |
| 3430 | * Filters the URI of a WordPress admin CSS file. |
| 3431 | * |
| 3432 | * @since 2.3.0 |
| 3433 | * |
| 3434 | * @param string $_file Relative path to the file with query arguments attached. |
| 3435 | * @param string $file Relative path to the file, minus its ".css" extension. |
| 3436 | */ |
| 3437 | return apply_filters( 'wp_admin_css_uri', $_file, $file ); |
| 3438 | } |
| 3439 | |
| 3440 | /** |
| 3441 | * Enqueues or directly prints a stylesheet link to the specified CSS file. |
| 3442 | * |
| 3443 | * "Intelligently" decides to enqueue or to print the CSS file. If the |
| 3444 | * {@see 'wp_print_styles'} action has *not* yet been called, the CSS file will be |
| 3445 | * enqueued. If the {@see 'wp_print_styles'} action has been called, the CSS link will |
| 3446 | * be printed. Printing may be forced by passing true as the $force_echo |