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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 |
|---|---|
| 495 | require_once(ABSPATH . 'wp-admin/admin-header.php'); |
| 496 | echo '<div class="wrap">'; |
| 497 | screen_icon('themes'); |
| 498 | echo '<h2>' . esc_html__('Update Themes') . '</h2>'; |
| 499 | echo "<iframe src='$url' style='width: 100%; height: 100%; min-height: 750px;' frameborder='0'></iframe>"; |
| 500 | echo '</div>'; |
| 501 | include(ABSPATH . 'wp-admin/admin-footer.php'); |
| 502 | |
| 503 | } else { |
| 504 | do_action('update-core-custom_' . $action); |
| 505 | } |