Concentrated issues

Here is the list of the lines that generated the most issues.

File Count Analysis
/linkedin_login.php:15314
  •   Several Instructions On The Same Line
  •   Common Alternatives
  •   Undefined Classes
  •   Undefined Class Constants
  •   Empty Instructions
  •   No Hardcoded Hash
/oauth_login/oauth_lib/http.php:42410
  •   Iffectations
  •   Uses Default Values
  •   Buried Assignation
  •   Useless Parenthesis
  •   Undefined Functions
  •   Drop Else After Return
  •   Nested Ifthen
  •   Bail Out Early
  •   No Need For Else
/oauth_login/oauth_lib/http.php:128410
  •   Should Use Coalesce
  •   Nested Ternary
  •   Uses Default Values
  •   Buried Assignation
  •   Useless Parenthesis
  •   Wrong Parameter Type
  •   Wrong Type For Native PHP Function
  •   Null Or Boolean Arrays
/api/index.php:1427
  •   $this Belongs To Classes Or Traits
  •   Implied If
  •   Or Die
  •   Exit() Usage
  •   Should Use Prepared Statement
  •   Don't Echo Error
  •   Logical Should Use Symbolic Operators
/oauth_login/oauth_lib/http.php:15577
  •   Used Once Variables (In Scope)
  •   Uses Default Values
  •   PHP Keywords As Names
  •   Buried Assignation
  •   Written Only Variables
  •   Wrong Parameter Type
  •   Wrong Type For Native PHP Function