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<?php $str = "800"; function getCombinations($array) { //initalize array $results = [[]]; //get all combinations foreach ($array as $k => $element) { foreach ($results as $combination) $results[] = $combination + [$k => $element]; } //return filtered array return array_values(array_filter($results)); } $arr = getCombinations(str_split("", $str)); foreach($arr as $v) echo implode(" ", $v) . "<br />";
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