diff --git a/data_types.php b/data_types.php
new file mode 100644
index 0000000..6cc6ff5
--- /dev/null
+++ b/data_types.php
@@ -0,0 +1,65 @@
+<?php
+
+function convert_to_int($value) {
+  if (!$value){
+    return 0;
+  } else {
+    return intval($value);
+  }
+}
+
+function convert_to_float($value) {
+  if (!$value){
+    return 0.0;
+  } else {
+    return floatval($value);
+  }
+}
+
+function convert_to_string($value) {
+  if (!$value) {
+    return "";
+  } else if (is_array($value)) {
+    return implode(", ", $value);
+  } else {
+    return strval($value);
+  }
+}
+
+function convert_to_bool($value) {
+  if (!$value) {
+  return false;
+  } else {
+  return boolval($value);
+  }
+}
+
+//function convert_to_array($value) {
+//  if (!$value) {
+//    return [];
+//  } else if (is_array($value)) {
+//    return $value;
+//  } else {
+//    return [$value];
+//  }
+//}
+//var_dump (convert_to_array(''));
+
+function convert_to_array ($value) {
+  if ($value === null) {
+    return [];
+} else {
+  return (array)$value;
+}
+
+//var_dump (convert_to_array(''));
+
+function convert_to_null($value) {
+  if (!$value || $value === "null") {
+      return null;
+  } else {
+    return $value;
+  }
+}
+//var_dump (convert_to_int(4.2), convert_to_float(4.2), convert_to_string([4, 5, 6]), convert_to_bool(4.2), convert_to_array(4.2), convert_to_null(4.2));
+?>
diff --git a/src/data_types.php b/src/data_types.php
new file mode 100644
index 0000000..ecbd61d
--- /dev/null
+++ b/src/data_types.php
@@ -0,0 +1,65 @@
+<?php
+
+function convert_to_int($value) {
+  if (!$value){
+    return 0;
+  } else {
+    return intval($value);
+  }
+}
+
+function convert_to_float($value) {
+  if (!$value){
+    return 0.0;
+  } else {
+    return floatval($value);
+  }
+}
+
+function convert_to_string($value) {
+  if (!$value) {
+    return "";
+  } else if (is_array($value)) {
+    return implode(", ", $value);
+  } else {
+    return strval($value);
+  }
+}
+
+function convert_to_bool($value) {
+  if (!$value) {
+  return false;
+  } else {
+  return boolval($value);
+  }
+}
+
+function convert_to_array($value) {
+  if ($value === null) {
+    return [];
+  } else if (is_array($value)) {
+    return $value;
+  } else {
+    return [$value];
+  }
+}
+//var_dump (convert_to_array(''));
+
+//function convert_to_array($value) {
+//  if ($value === null) {
+//    return [];
+//} else {
+//  return [$value];
+//}
+//}
+var_dump (convert_to_array([2,3]));
+
+function convert_to_null($value) {
+  if (!$value || $value === "null") {
+      return null;
+  } else {
+    return $value;
+  }
+}
+//var_dump (convert_to_int(4.2), convert_to_float(4.2), convert_to_string([4, 5, 6]), convert_to_bool(4.2), convert_to_array(4.2), convert_to_null(4.2));
+?>