12

euler12.php

@@ -0,0 +1,29 @@
+<?php
+/*
+* Gnieark's anwser to euler problem 12
+* https://projecteuler.net/problem=12
+*/
+
+$triangleNumber=1;
+$triangleValue=1;
+while(countDivisors($triangleValue)<500){
+    //echo $triangleValue.":".countDivisors($triangleValue)."\n";
+    $triangleNumber++;
+    $triangleValue+=$triangleNumber;
+}
+echo $triangleValue;
+function countDivisors($number){
+    $right=$number;
+    $i=1;
+    $counter=0;
+    
+    while($i<=$right){
+        if(fmod($number,$i)==0){
+            $right=$number/$i; //increase algo speed
+            $counter++;
+        }
+        $i++;
+    }
+    return $counter *2 ; 
+
+}