PHP關閉HTTP連接然後繼續處理？

Question

爲什麼這個函數的最後一行需要這個工作？我不明白這裏發生了什麼事。它確實工作。

function close_connection() { 
    // if we're using sessions this stops them from hanging on other requests 
    session_write_close(); 
    // get the content length from the buffer (the whole point of the buffer) 
    header('Content-Length: 0'); 
    // close the connection 
    header('Connection: close'); 
    // flush the buffers to the screen 
    flush(); 

    // connection closing doesn't work without this. I don't know why 
    echo ' '; 
} 

Answer 1

只要第一個字節輸出到瀏覽器，就會發送標題。
您也可以嘗試使用ob_end_flush();