$str="hahahahahahahahahahahahahaha";
$nn=1;
$str=str_replace('ha','MyGod',$str,$nn);
echo $str;
the result is MyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGodMyGod
Why $nn has no effect?the version of my php?
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