From 274b248cced9f5a38ef2474a8ab421318106ff85 Mon Sep 17 00:00:00 2001
From: Schuyler Grisham <Schuyler Grisham>
Date: Thu, 15 Sep 2016 16:13:55 -0400
Subject: [PATCH 1/3] initial commit of code challenge

---
 data_types.php | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 data_types.php

diff --git a/data_types.php b/data_types.php
new file mode 100644
index 0000000..81939b9
--- /dev/null
+++ b/data_types.php
@@ -0,0 +1,43 @@
+
+<?php
+//convert_to_int()
+function convert_to_int($input){
+if (is_string($input)) { $input = 0;
+}
+  return intval($input);
+}
+//convert_to_float()
+function convert_to_float($input){
+if (is_string($input)) { $input = 0.0;
+}
+  return floatval($input);
+}
+//convert_to_string()
+function convert_to_string($input){
+if (is_array($input)) { return implode(",", $input);
+}
+  return (string)$input;
+}
+//convert_to_bool()
+function convert_to_bool($input){
+  if (!$input) {
+    return false;
+  }
+  return settype($input,'bool');
+}
+//convert_to_array()
+function convert_to_array($input){
+  if ($input == null) { return [];
+}
+  return str_split($input);
+}
+//convert_to_null()
+function convert_to_null($input){
+  if (!$input || $input == "null"){
+    return null;
+  } else {
+    return $input;
+  }
+}
+
+ ?>

From c5e67cdaa761687afb643c2ac2b9416351f5187e Mon Sep 17 00:00:00 2001
From: Schuyler Grisham <Schuyler Grisham>
Date: Thu, 15 Sep 2016 16:25:20 -0400
Subject: [PATCH 2/3] second commit for challenge

---
 data_types.php | 31 +++++++++++++++++--------------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/data_types.php b/data_types.php
index 81939b9..4208ca9 100644
--- a/data_types.php
+++ b/data_types.php
@@ -2,42 +2,45 @@
 <?php
 //convert_to_int()
 function convert_to_int($input){
-if (is_string($input)) { $input = 0;
-}
   return intval($input);
 }
 //convert_to_float()
 function convert_to_float($input){
-if (is_string($input)) { $input = 0.0;
-}
   return floatval($input);
 }
 //convert_to_string()
 function convert_to_string($input){
-if (is_array($input)) { return implode(",", $input);
-}
-  return (string)$input;
+if (is_array($input)) { $input = implode(",", $input);
+  } else {
+    $input = strval($input);
+  }
+  return $input;
 }
 //convert_to_bool()
 function convert_to_bool($input){
-  if (!$input) {
+  if ($input) {
+    return true;
+  } else {
     return false;
   }
-  return settype($input,'bool');
 }
 //convert_to_array()
 function convert_to_array($input){
-  if ($input == null) { return [];
-}
-  return str_split($input);
+  if ($input === null) {
+    return array();
+  } else if (is_array($input)) {
+    return $input;
+  } else {
+    return array($input);
+  }
 }
 //convert_to_null()
 function convert_to_null($input){
-  if (!$input || $input == "null"){
+  if (!$input || $input === "null"){
     return null;
   } else {
     return $input;
   }
 }
 
- ?>
+?>

From 631fe45dcae728bce80eec9be8a86bd9443505bb Mon Sep 17 00:00:00 2001
From: Schuyler Grisham <Schuyler Grisham>
Date: Thu, 15 Sep 2016 16:34:16 -0400
Subject: [PATCH 3/3] third attempt at code challenge

---
 data_types.php | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/data_types.php b/data_types.php
index 4208ca9..4706fa5 100644
--- a/data_types.php
+++ b/data_types.php
@@ -2,36 +2,47 @@
 <?php
 //convert_to_int()
 function convert_to_int($input){
-  return intval($input);
+  if (settype($input, "int")) {
+    return $input;
+  } else {
+    return 0;
+  }
 }
+
 //convert_to_float()
 function convert_to_float($input){
-  return floatval($input);
+  if (settype($input, "float")) {
+    return $input;
+  } else {
+    return 0.0;
+  }
 }
+
 //convert_to_string()
 function convert_to_string($input){
-if (is_array($input)) { $input = implode(",", $input);
+  if (is_array($input)) {
+     return implode(", ", $input);;
+  } elseif (!settype($input, "string")){
+    return "";
   } else {
-    $input = strval($input);
+    return $input;
   }
-  return $input;
 }
 //convert_to_bool()
 function convert_to_bool($input){
-  if ($input) {
-    return true;
+  if (settype($input, "bool")){
+    return $input;
   } else {
     return false;
   }
 }
+
 //convert_to_array()
 function convert_to_array($input){
-  if ($input === null) {
-    return array();
-  } else if (is_array($input)) {
+  if (settype($input, "array")) {
     return $input;
   } else {
-    return array($input);
+    return array();
   }
 }
 //convert_to_null()