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In & NOt in Condition

SQL is the most important language for any developer. It is used in all the major industries and applications. But, there are some quirks at play in SQL that can cause difficulties to developers.


The In & Out condition is a PHP function that allows you to check whether a variable is in the list of values or not.

The In & NOt in condition helps us to avoid unexpected behaviour of the application. If the In & NOt in condition isn't checked, then it allows the user to enter any number of characters and the application will accept them as valid data.

In PHP, the condition statement is used to check for a value and determine whether or not a given action will be carried out. The In & Not In condition is one of the most common conditions that you can use.

The In & NOt in condition is an important part of the conditional logic in programming. It helps to make decisions based on the outcome of a previous decision.

Types of conditions in Core PHP:

  • Boolean Condition: Boolean conditions evaluate if a given expression evaluates to true or false.
  • Comparison Condition: Comparison conditions evaluate two expressions and return one of two values - true or false.
  • Relational Condition: Relational conditions evaluate two expressions and return one of three values - true, false, or null.
  • Iteration Condition: Iteration conditions iterate through an array or object and perform an action for each element in the collection

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