feat: type casting

Author: codewithhridoy

08_type_casting.php

@@ -0,0 +1,107 @@
+<?php
+
+/*
+ * Casting in PHP is done with these statements:
+ * (string) - Converts to data type String
+ * (int) - Converts to data type Integer
+ * (float) - Converts to data type Float
+ * (bool) - Converts to data type Boolean
+ * (array) - Converts to data type Array
+ * (object) - Converts to data type Object
+ * (unset) - Converts to data type NULL
+ * */
+
+// Cast to Integer
+$a = 5.90;
+$b = "kilometers 25";
+$c = true;
+$d = NULL;
+
+$a = (int)$a;
+$b = (int)$b;
+$c = (int)$c;
+$d = (int)$d;
+
+echo "<pre/>======== Cast to Integer ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+// Cast to Float
+$a = 5;
+$b = "kilometers 25";
+$c = true;
+$d = NULL;
+
+$a = (float)$a;
+$b = (float)$b;
+$c = (float)$c;
+$d = (float)$d;
+
+echo "<pre/>======== Cast to Float ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+// Cast to Boolean
+$a = 5;
+$b = "kilometers 25";
+$c = 5.90;
+$d = NULL;
+
+$a = (bool)$a;
+$b = (bool)$b;
+$c = (bool)$c;
+$d = (bool)$d;
+
+echo "<pre/>======== Cast to Boolean ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+
+// Cast to Array
+$a = 5;
+$b = "kilometers 25";
+$c = 5.90;
+$d = NULL;
+
+$a = (array)$a;
+$b = (array)$b;
+$c = (array)$c;
+$d = (array)$d;
+
+echo "<pre/>======== Cast to Array ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+// Cast to Object
+$a = 5;
+$b = "kilometers 25";
+$c = 5.90;
+$d = NULL;
+
+$a = (object)$a;
+$b = (object)$b;
+$c = (object)$c;
+$d = (object)$d;
+
+echo "<pre/>======== Cast to Object ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+// Cast to NULL
+$a = 5;
+$b = "kilometers 25";
+$c = 5.90;
+$d = NULL;
+
+// $a = (unset)$a; // (Deprecated since version 7.2)
+$a = NULL;
+$b = null;
+$c = null;
+$d = null;
+
+echo "<pre/>======== Cast to NULL ======== <pre/>";
+var_dump($a, $b, $c, $d);
+
+// Converting Arrays into Objects:
+$a = array("Volvo", "BMW", "Toyota"); // indexed array
+$b = array("Peter" => "35", "Ben" => "37", "Joe" => "43"); // associative array
+
+$a = (object)$a;
+$b = (object)$b;
+echo "<pre/>======== Converting Arrays into Objects ======== <pre/>";
+var_dump($a, $b);