douzhulan1815 2015-05-28 03:46
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PHP实时输出时出错

header( 'Content-type: text/html; charset=utf-8' );
echo 'Begin ...<br />';
ob_start();
for( $i = 0 ; $i < 10 ; $i++ )
{
    echo $i . '<br />';
    flush();
    ob_flush();
    sleep(1);
}

why these code is not output $i each second? it output on 10 second later

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2条回答 默认 最新

  • doushi4956 2015-05-28 04:00
    关注

    It seems to me that your code is, indeed, outputing $i in every 1 second steadily when ran from the terminal but it doesn't do it when load through web.

    The workaround for you is to enable implicit flushing: http://php.net/manual/en/function.ob-implicit-flush.php

    And remove that ob_start() call. The following code works perfectly:

    <?php
        header( 'Content-type: text/html; charset=utf-8' );
        echo 'Begin ...<br />';
        ob_implicit_flush (1);
        for( $i = 0 ; $i < 10 ; $i++ )
        {
            echo $i . '<br />';
            flush();
            ob_flush();
            sleep(1);
        }
    ?>
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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