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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 |
|---|---|
| 28 | $php_version = phpversion(); |
| 29 | |
| 30 | $current = get_site_transient( 'update_core' ); |
| 31 | if ( ! is_object($current) ) { |
| 32 | $current = new stdClass; |
| 33 | $current->updates = array(); |
| 34 | $current->version_checked = $wp_version; |
| 35 | } |
| 36 | |
| 37 | $locale = apply_filters( 'core_version_check_locale', get_locale() ); |
| 38 | |
| 39 | // Update last_checked for current to prevent multiple blocking requests if request hangs |
| 40 | $current->last_checked = time(); |
| 41 | set_site_transient( 'update_core', $current ); |
| 42 | |
| 43 | if ( method_exists( $wpdb, 'db_version' ) ) |
| 44 | $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version()); |
| 45 | else |
| 46 | $mysql_version = 'N/A'; |