PHP Tutorial included 
many sample codes

Variable Types
Constants
Operator Types
Decision Making
Loop Types
Arrays
Strings
Web Concepts
GET & POST
File Inclusion
Files & I/O
Functions
Cookies
Sessions
Sending Emails
File Uploading
Coding Standard
Predefined Variables
Regular Expression
Error Handling
Bugs Debugging
Date & Time
PHP & MySQL

Source : 
https://www.tutorialspoint.com/php