yoda condition and identical comparison added

Author: ismail1432

README.md

@@ -14,7 +14,10 @@
  * [Avoid Mental Mapping](#avoid-mental-mapping)
  * [Don't add unneeded context](#dont-add-unneeded-context)
  * [Use default arguments instead of short circuiting or conditionals](#use-default-arguments-instead-of-short-circuiting-or-conditionals)
- 3. [Functions](#functions)
+ 3. [Comparaison](#comparaison)
+ * [Use Yodas conditions](#yoda_condition)
+ * [Use identical comparison](#identical_comparison)
+ 4. [Functions](#functions)
  * [Function arguments (2 or fewer ideally)](#function-arguments-2-or-fewer-ideally)
  * [Functions should do one thing](#functions-should-do-one-thing)
  * [Function names should say what they do](#function-names-should-say-what-they-do)
@@ -29,20 +32,20 @@
  * [Avoid type-checking (part 1)](#avoid-type-checking-part-1)
  * [Avoid type-checking (part 2)](#avoid-type-checking-part-2)
  * [Remove dead code](#remove-dead-code)
- 4. [Objects and Data Structures](#objects-and-data-structures)
+ 5. [Objects and Data Structures](#objects-and-data-structures)
  * [Use object encapsulation](#use-object-encapsulation)
  * [Make objects have private/protected members](#make-objects-have-privateprotected-members)
- 5. [Classes](#classes)
+ 6. [Classes](#classes)
  * [Prefer composition over inheritance](#prefer-composition-over-inheritance)
  * [Avoid fluent interfaces](#avoid-fluent-interfaces)
- 6. [SOLID](#solid)
+ 7. [SOLID](#solid)
  * [Single Responsibility Principle (SRP)](#single-responsibility-principle-srp)
  * [Open/Closed Principle (OCP)](#openclosed-principle-ocp)
  * [Liskov Substitution Principle (LSP)](#liskov-substitution-principle-lsp)
  * [Interface Segregation Principle (ISP)](#interface-segregation-principle-isp)
  * [Dependency Inversion Principle (DIP)](#dependency-inversion-principle-dip)
- 7. [Don’t repeat yourself (DRY)](#dont-repeat-yourself-dry)
- 8. [Translations](#translations)
+ 8. [Don’t repeat yourself (DRY)](#dont-repeat-yourself-dry)
+ 9. [Translations](#translations)
 
 ## Introduction
 
@@ -386,6 +389,59 @@ function createMicrobrewery(string $breweryName = 'Hipster Brew Co.'): void
 
 **[⬆ back to top](#table-of-contents)**
 
+## Comparison
+
+### Use [Yoda conditions](https://en.wikipedia.org/wiki/Yoda_conditions)
+
+A Yoda condition places the constant portion of the expression on the left side of the conditional statement
+Yoda conditions are part of the [WordPress](https://make.wordpress.org/core/handbook/best-practices/coding-standards/php/) and [Symfony coding standards](http://symfony.com/doc/current/contributing/code/standards.html).
+
+**Not good:**
+
+
+```php
+if ( $value == 42) 
+{
+ // ... 
+} 
+```
+Reads like: "If the value equal to 42..." 
+
+**Good:**
+
+
+```php
+if ( 42 == $value) 
+{
+ // ... 
+} 
+```
+Reads like: "If the 42 equal to $value and it's avoid a common mistake 42 = $value" 
+
+**[⬆ back to top](#table-of-contents)**
+
+### Use [identical comparison](http://php.net/manual/en/language.operators.comparison.php)
+
+**Not good:**
+
+```php
+if( $a == $b )
+{
+ //...
+}
+```
+
+**Good:**
+
+```php
+if( $a === $b )
+{
+ //...
+}
+```
+**[⬆ back to top](#table-of-contents)**
+
+
 ## Functions
 
 ### Function arguments (2 or fewer ideally)