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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 | 
|---|---|
| 552 |  | 
| 553 |      /** | 
| 554 |       * Fires when admin styles enqueued for the legacy (pre-3.5.0) media upload popup are printed. | 
| 555 |       * | 
| 556 |       * @since 2.9.0 | 
| 557 |       */ | 
| 558 |      do_action( 'admin_print_styles-media-upload-popup' );  // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores | 
| 559 |  | 
| 560 |      /** This action is documented in wp-admin/admin-header.php */ | 
| 561 |      do_action( 'admin_print_styles' ); | 
| 562 |  | 
| 563 |      /** | 
| 564 |       * Fires when admin scripts enqueued for the legacy (pre-3.5.0) media upload popup are printed. | 
| 565 |       * | 
| 566 |       * @since 2.9.0 | 
| 567 |       */ | 
| 568 |      do_action( 'admin_print_scripts-media-upload-popup' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores | 
| 569 |  | 
| 570 |      /** This action is documented in wp-admin/admin-header.php */ |