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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 |
|---|---|
| 27 | sprintf(__('<a href="%s">Credits</a>'), admin_url('credits.php') ), |
| 28 | ); |
| 29 | echo apply_filters( 'admin_footer_text', implode( ' • ', $footer_text ) ); |
| 30 | unset( $footer_text ); |
| 31 | ?></p> |
| 32 | <p id="footer-upgrade" class="alignright"><?php echo $upgrade; ?></p> |
| 33 | <div class="clear"></div> |
| 34 | </div> |
| 35 | <?php |
| 36 | do_action('admin_footer', ''); |
| 37 | do_action('admin_print_footer_scripts'); |
| 38 | do_action("admin_footer-" . $GLOBALS['hook_suffix']); |
| 39 | |
| 40 | // get_site_option() won't exist when auto upgrading from <= 2.7 |
| 41 | if ( function_exists('get_site_option') ) { |
| 42 | if ( false === get_site_option('can_compress_scripts') ) |
| 43 | compression_test(); |
| 44 | } |
| 45 | |