diff --git a/data_types.php b/data_types.php
new file mode 100644
index 0000000..4706fa5
--- /dev/null
+++ b/data_types.php
@@ -0,0 +1,57 @@
+
+<?php
+//convert_to_int()
+function convert_to_int($input){
+  if (settype($input, "int")) {
+    return $input;
+  } else {
+    return 0;
+  }
+}
+
+//convert_to_float()
+function convert_to_float($input){
+  if (settype($input, "float")) {
+    return $input;
+  } else {
+    return 0.0;
+  }
+}
+
+//convert_to_string()
+function convert_to_string($input){
+  if (is_array($input)) {
+     return implode(", ", $input);;
+  } elseif (!settype($input, "string")){
+    return "";
+  } else {
+    return $input;
+  }
+}
+//convert_to_bool()
+function convert_to_bool($input){
+  if (settype($input, "bool")){
+    return $input;
+  } else {
+    return false;
+  }
+}
+
+//convert_to_array()
+function convert_to_array($input){
+  if (settype($input, "array")) {
+    return $input;
+  } else {
+    return array();
+  }
+}
+//convert_to_null()
+function convert_to_null($input){
+  if (!$input || $input === "null"){
+    return null;
+  } else {
+    return $input;
+  }
+}
+
+?>