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<?php
header("Content-Type: text/plain");
set_time_limit(0);
$infoString = "Hello World" . "\n";
while( isset($infoString) )
{
echo $infoString;
flush();
ob_flush();
sleep(5);
}
?>
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echo
$_GET['a']; //ÏÔʾ"ok"
?>
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<?php
function foo($arg)
{
return $arg
}
?>
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<?php
function foo($arg = NULL)
{
return $arg == NULL ? "" : $arg;
}
?>
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