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<? $str = "hallo welt"; $str[0] = "k"; $str[6] = "s"; var_dump($str); $str = ""; var_dump($str); ?>
Output for 5.4.34 - 7.2.0
string(10) "kallo selt" string(0) ""
Output for 4.3.0 - 5.4.32
<? $str = "hallo welt"; $str[0] = "k"; $str[6] = "s"; var_dump($str); $str = ""; var_dump($str); ?>