flippr · November 20, 2024 15:37 · Mar 18, 2016 · Mar 18, 2016 · Mar 18, 2016
diff --git a/flatten b/flatten
@@ -45,7 +45,7 @@ function test()
     foreach ($tests as $test) {
         // Print the final array
         print_r(flatten_array($test));
-		echo "<br>";
+	echo "<br>";
     }
 }
 

diff --git a/flatten b/flatten
@@ -47,4 +47,7 @@ function test()
         print_r(flatten_array($test));
 		echo "<br>";
     }
-}
+}
+
+// run test to validate function
+test();
diff --git a/flatten b/flatten
@@ -0,0 +1,50 @@
+/**
+ * Function to flatten a multi-dimensional array and return an array
+ * containing the unique values on the array as a single array.
+
+ * @param $array
+ *
+ * @return array
+ */
+function flatten_array($array)
+{
+    $flat = array();
+
+    foreach ($array as $value) {
+        try {
+            if (is_array($value)) {
+                $flat = array_merge($flat, flatten_array($value));
+            } else {
+                $flat[] = $value;
+            }
+        } catch (\Exception $e) {
+            $flat[] = $e;
+        }
+    }
+
+    return $flat;
+}
+
+
+/**
+ * Test function runs each array through the flatten fucntion to produce
+ * the final flattened array.
+ * 
+ * 
+ */
+function test()
+{
+    $tests = [
+        [[1, 2, 3], [4], 5, 6, 7, 8, [9, 10]],
+        [[1, 2, [3]], [4], 5, [6, 7], 8, [[9, 10]], []],
+        [[[1], [2], [3]], [[4], 5, 6], 7, 8, [9, 10]],
+        [],
+        [1, 2],
+    ];
+
+    foreach ($tests as $test) {
+        // Print the final array
+        print_r(flatten_array($test));
+		echo "<br>";
+    }
+}
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