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--- errorhandler_class [2019/12/21 22:18] – created sahl
+++ errorhandler_class [2021/02/15 20:56] (current) – sahl
@@ Line 4: / Line 4: @@
 There are also some utility functions for debugging code.
+===== Typechecking =====
+To introduce semi-strict type checking on functions, the class introduces the ''checkParams()'' which takes a variable number of parameters, but always in pairs of two.
+One pass a variable to the function and then a type name, and if the variable doesn't match the given type, then an error is triggered.
+Example:
+<code php>
+/**
+ * Display name and age of person.
+ * @param string $name Name of person.
+ * @param int $age Age of person.
+ */
+function displayNameAndAge($name, $age) {
+  Errorhandler::checkParams($name, 'string', $age, 'int');
+  echo $name.' - '.$age.' years.';
+}
+</code>
+This will trigger an error if the ''$name'' and ''$age'' variable isn't of the correct types.
+==== Types ====
+The following types can be checked. If anything else is typed it is considered a name of a class.
+|string|
+|int|
+|integer|
+|float|
+|array|
+|resource|
+|boolean|
+integer and floats are checked based on content and not variable type, so a string containing a valid integer number will pass as a integer.