php sleep 实例

<?php
ob_start();

ob_implicit_flush(true);
//[ OR ] echo "..."; ob_flush(); flush();

set_time_limit(0);

function sleep_echo($secs) {
    $secs = (int) $secs;
    $buffer = str_repeat(".", 4096);
    //echo $buffer."\r\n<br />\r\n";
    for ($i=0; $i<$secs; $i++) {
        echo date("H:i:s", time())." (".($i+1).")"."\r\n<br />\r\n".$buffer."\r\n<br />\r\n";
        //ob_flush();
        flush();
        sleep(1);
        //usleep(1000000);
    }
}
ob_flush();
sleep_echo(10);

ob_end_flush();
?>