September 2017 Update

Task/Combinations/PHP/combinations-1.php

@@ -0,0 +1,50 @@
+ <?php
+//Author: I. Gavryushin aka dcc0
+//set amount of elements as in $n var
+$a=array(1,2,3,4,5);
+$k=3;
+$n=5;
+$c=array_splice($a, $k);
+$b=array_splice($a, 0, $k);
+$j=$k-1;
+print_r($b);
+
+        while (1) {
+	
+       		$m=array_search($b[$j]+1,$c);
+       	     if ($m!==false) {
+	     	$c[$m]-=1;
+        	$b[$j]=$b[$j]+1;
+               	print_r($b);	
+        }
+       	if ($b[$k-1]==$n) {
+	 $i=$k-1;
+	 while ($i >= 0) {
+
+	 		if ($i == 0 && $b[$i] == $n-$k+1) break 2;
+	
+       		  $m=array_search($b[$i]+1,$c);
+		  if ($m!==false) {
+		  	  $c[$m]=$c[$m]-1;
+			  $b[$i]=$b[$i]+1;
+
+			$g=$i;
+		while ($g != $k-1) {
+			array_unshift ($c, $b[$g+1]);
+			$b[$g+1]=$b[$g]+1;
+			$g++;
+			}
+			$c=array_diff($c,$b);
+			print_r($b);
+		 	     break;
+       			 }
+	 	$i--;
+	
+		}
+	
+	}
+	
+
+}
+
+?>