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Calling ob_flush() and flush(), yet browser doesn't show any output until script finishes

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离开以前
离开以前 2020-12-07 00:55

Hi Please View Below Code :

\\n\";
for( $i = 0 ; $i < 10 ; $i++ )
{
    echo \"$i
\\n\";
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12条回答
  • 没有蜡笔的小新
    2020-12-07 00:57

    Hey man I was also got stuck in this problem and finally got the correct solution here it is for you

    you have to add content type for your page you can do that by two ways 1. using html tag

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

    Ex.

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Wp Migration</title>
</head>
<body>
<?php 
for($i=0;$i<70;$i++)
{
echo 'printing...<br>';
ob_flush();
flush();
sleep(3);
}
?>
</body>
</html>

    1. using php header function

      <?php header( 'Content-type: text/html; charset=utf-8' ); ?>

    Ex.

    <?php 
header( 'Content-type: text/html; charset=utf-8' );
for($i=0;$i<70;$i++)
{
echo 'printing...<br>';
ob_flush();
flush();
sleep(3);
}
?>

    All the best

    0 讨论(0)
  • 闹比i
    2020-12-07 00:57

    This flow works with Laravel too 

    ob_implicit_flush(true);
echo "Processing ... "; // Or give out JSON output
ob_flush();
sleep(5); //A time-consuming synchronous process (SMTP mail, maybe?)
echo "Done";
    0 讨论(0)
  • 北恋
    2020-12-07 00:58

    Using Chrome, I found out that many more bytes are required to by-pass the browser's buffer. In my case 4096 bytes was fine:

    echo str_repeat(' ', 4096);

    Also, adding some HTML element at the beginning also seemed to be mandatory:

    echo $content . '<br />';
    0 讨论(0)
  • 猫巷女王i
    2020-12-07 00:58

    For people using FCGI / fast cgi.

    FcgidOutputBufferSize 0
    0 讨论(0)
  • 伪装坚强ぢ
    2020-12-07 01:00

    On my system it appears that FF4 needs more than 256 bytes to start rendering what is arriving from the server side, then i resolved with this at the beginning:

    while (@ob_end_flush());
echo(str_repeat(' ',1024));
// ...etc...
    0 讨论(0)
  • 攒了一身酷
    2020-12-07 01:03

    I am using laravel framework and buffering did not work but. This is solution :

    header( 'Content-type: text/html; charset=utf-8' );
ob_start();

ob_end_flush();
ob_flush();
flush();
for($i = 1;$i<= 5;$i++){
    echo $i;
    ob_flush();
    flush();

    sleep(3);
}

    You have to use first ob_end_flush();

    0 讨论(0)
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