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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # socket_select * * * * * 說明: >在指定的超時時間內,運行select()系統調用數組參數內的套接字,用于確定一個或多個套接字的狀態,對每一個套接字,調用者可查詢它的可讀性、可寫性及錯誤狀態信息 語法: ~~~ int socket_select ( array &$read , array &$write , array &$except , int $tv_sec [, int $tv_usec = 0 ] ) ~~~ 參數: | 參數 | 描述 | | --- | --- | | read | 指向一組等待可讀性檢查的套接字| | write | 指向一組等待可寫性檢查的套接字| | except | 指向一組等待錯誤檢查的套接字| | tv_sec | 用來設置select()的等待時間,秒| | tv_usec兩者組成了 | 用來設置select()的等待時間,微妙| 1. tv_sec和tv_usec兩者構成超時參數,tv_sec為0,socket_select()立即返回,此時可認為是是非阻塞的,這種情況適用于輪詢 2. 如果 tv_sec是 NULL,socket_select()將一直阻塞到有一個套接字滿足條件 返回值: | 成功 | 失敗 | | --- | --- | | 返回滿足條件的套接字的數目 | false | 技術細節: PHP版本:PHP 4 >= 4.2.0, PHP 5, PHP 7 實例: ~~~ ~~~ 資料來源: http://php.net/manual/zh/function.socket-select.php http://blog.csdn.net/im_kk/article/details/45033533 http://blog.csdn.net/gooer/article/details/3951135 http://blog.csdn.net/wypblog/article/details/6826286
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