Added section for assignment operators. (#24416)

* updated index.md

Added new paragraph for assigment operator. Edited "More Inofrmation" section by adding two links.

* Fixed formatting issues and assignment statement

guide/english/php/php-operators/index.md

@@ -62,11 +62,23 @@ title: PHP Operators
   </tr>
 </table>
 
+### PHP Assignment Operators
 
+The assignment operator is `=`. The operand on the left side gets assigned the value of the expression on the right.
+
+#### Example
+
+```php
+<?php
+
+  $a = 7; // $a set to 7.
+  
+ ?>  
+```
 
 <!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
 
 #### More Information:
-<!-- Please add any articles you think might be helpful to read before writing the article -->
-
+- <a href='http://php.net/manual/en/language.operators.arithmetic.php' target='_blank' rel='nofollow'>Arithmetic Operators</a></li>
+- <a href='http://php.net/manual/en/language.operators.assignment.php' target='_blank' rel='nofollow'>Assignment Operators</a></li>