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run code in 150+ php & hhvm versions
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<?php $str = "a to b"; $arr = explode("to",$str); print_r($arr); $str1 = "a b"; $arr1 = explode("to",$str1); print_r($arr1);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => a [1] => b ) Array ( [0] => a b )