(PHP 4, PHP 5, PHP 7)
ob_implicit_flush — Turn implicit flush on/off
ob_implicit_flush ([ int $flag = 1 ] ) : void
ob_implicit_flush() will turn implicit flushing on or off. Implicit flushing will result in a flush operation after every output call, so that explicit calls to flush() will no longer be needed.
flag
1 to turn implicit flushing on, 0 otherwise.
No value is returned.
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https://www.php.net/manual/en/function.ob-implicit-flush.php