使用Ajax在PHP中运行函数时显示实时调试消息

Question

I have a function like this that may run for 20 minutes:

function  test($videoarray)
{
    for($i;$i<100;$i++)
        if(converVideo($videoarray[$i]))
        {
           echo 'video number '.$i.' has been convert';
        }
        else
        {
           echo 'video number '.$i.' Is too large.';
        } 
}

During this time I wish I could see the messages live, for example with Ajax/PHP.

Is it possible?

Desired result:

1st min:  video number 1 has been converted.
2nd min:  video number 2 is too large.
,
.
.

Answer 1

I would recommend adding flush(); after each echo

This should force the message to the screen once written.

Example

echo 'video number '.$i.' has been convert';
flush();

PHP FLUSH

This might not always work therefore one can always persist the messages to a database and have a polling mechanism to read the message every couple of seconds.

EXAMPLE of PHP Polling