A-M baby

Task/Matrix-transposition/PHP/matrix-transposition.php

@@ -0,0 +1,10 @@
+function transpose($m) {
+  if (count($m) == 0) // special case: empty matrix
+    return array();
+  else if (count($m) == 1) // special case: row matrix
+    return array_chunk($m[0], 1);
+
+  // array_map(NULL, m[0], m[1], ..)
+  array_unshift($m, NULL); // the original matrix is not modified because it was passed by value
+  return call_user_func_array('array_map', $m);
+}