check if sum of five consecutive integer is equal to n .
if ( $ i + $ i + 1 + $ i + 2 + $ i + 3 + $ i + 4 == $ n ) { echo $ i , " " ▁ , ▁ $ i ▁ + ▁ 1 , STRNEWLINE " " ▁ , ▁ $ i ▁ + ▁ 2 , STRNEWLINE " " ▁ , ▁ $ i ▁ + ▁ 3 , STRNEWLINE " " return ; } } echo " - 1" ; }