# PHP connection_status() 函數 ## 定義和用法 connection_status() 函數返回當前的連接狀態。 可返回的可能值： * 0 - CONNECTION_NORMAL - 連接運行正常 * 1 - CONNECTION_ABORTED - 連接由用戶或網絡錯誤終止 * 2 - CONNECTION_TIMEOUT - 連接超時 * 3 - CONNECTION_ABORTED & CONNECTION_TIMEOUT ### 語法 ``` connection_status() ``` ## 例子 ``` <?php switch (connection_status()) { case CONNECTION_NORMAL: $txt = 'Connection is in a normal state'; break; case CONNECTION_ABORTED: $txt = 'Connection aborted'; break; case CONNECTION_TIMEOUT: $txt = 'Connection timed out'; break; case (CONNECTION_ABORTED & CONNECTION_TIMEOUT): $txt = 'Connection aborted and timed out'; break; default: $txt = 'Unknown'; break; } echo $txt; ?> ```