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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 |
|---|---|
| 78 | * |
| 79 | * The dynamic portion of the hook name, `$GLOBALS['hook_suffix']`, |
| 80 | * refers to the global hook suffix of the current page. |
| 81 | * |
| 82 | * @since 2.8.0 |
| 83 | * |
| 84 | * @global string $hook_suffix |
| 85 | * @param string $hook_suffix The current admin page. |
| 86 | */ |
| 87 | do_action( "admin_footer-" . $GLOBALS['hook_suffix'] ); |
| 88 | |
| 89 | // get_site_option() won't exist when auto upgrading from <= 2.7 |
| 90 | if ( function_exists('get_site_option') ) { |
| 91 | if ( false === get_site_option('can_compress_scripts') ) |
| 92 | compression_test(); |
| 93 | } |
| 94 | |
| 95 | ?> |
| 96 | |