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run code in 300+ PHP versions simultaneously
<?php $a = 'aaa'; $b = 'bb'; $c = 'c'; $lenga = strlen($a); $lengb = strlen($b); $lengc = strlen($c); $leng = max([$lenga,$lengb,$lengc]); $out = ''; for($i=0;$i<$leng;$i++){ $out .= isset($a[$i]) ? $a[$i] : ''; $out .= isset($b[$i]) ? $b[$i] : ''; $out .= isset($c[$i]) ? $c[$i] : ''; } echo $out;

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