Use faster SplFixedArray instead of array_fill

loops/php/code.php

@@ -1,12 +1,18 @@
 <?php
 
 $u = (int) $argv[1];                                # Get an input number from the command line
-$r = rand(0, 10000);                                # Get a random number 0 <= r < 10k
-$a = array_fill(0, 10000, 0);    # Array of 10k elements initialized to 0
-for ($i = 0; $i < 10000; $i++) {                    # 10k outer loop iterations
-    for ($j = 0; $j < 100000; $j++) {               # 100k inner loop iterations, per outer loop iteration
-        $a[$i] += $j%$u;                    # Simple sum
+
+function main(int $u)
+{
+    $r = mt_rand(0, 10000);                                # Get a random number 0 <= r < 10k
+    $a = new SplFixedArray(10000);             # Array of 10k elements initialized to 0
+    for ($i = 0; $i < 10000; $i++) {                    # 10k outer loop iterations
+        for ($j = 0; $j < 100000; $j++) {               # 100k inner loop iterations, per outer loop iteration
+            $a[$i] += $j%$u;                    # Simple sum
+        }
+        $a[$i] += $r;                                   # Add a random value to each element in array
     }
-    $a[$i] += $r;                                   # Add a random value to each element in array
+    echo $a[$r];                                        # Print out a single element from the array
 }
-echo $a[$r];                                        # Print out a single element from the array
+
+main($u);