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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 |
|---|---|
| 17 | do_action( 'in_admin_footer' ); |
| 18 | $upgrade = apply_filters( 'update_footer', '' ); |
| 19 | echo apply_filters( 'admin_footer_text', '<span id="footer-thankyou">' . __('Thank you for creating with <a href="http://wordpress.org/">WordPress</a>.').'</span> | '.__('<a href="http://codex.wordpress.org/">Documentation</a>').' | '.__('<a href="http://wordpress.org/support/forum/4">Feedback</a>') ); ?> |
| 20 | </p> |
| 21 | <?php // if ( $is_IE ) browse_happy(); ?> |
| 22 | <p id="footer-upgrade" class="alignright"><?php echo $upgrade; ?></p> |
| 23 | <div class="clear"></div> |
| 24 | </div> |
| 25 | <?php |
| 26 | do_action('admin_footer', ''); |
| 27 | do_action('admin_print_footer_scripts'); |
| 28 | do_action("admin_footer-$hook_suffix"); |
| 29 | |
| 30 | // get_site_option() won't exist when auto upgrading from <= 2.7 |
| 31 | if ( function_exists('get_site_option') ) { |
| 32 | if ( false === get_site_option('can_compress_scripts') ) |
| 33 | compression_test(); |
| 34 | } |
| 35 | |