What are the potential consequences of using variables before they are defined in PHP?

Using variables before they are defined in PHP can result in errors such as "Undefined variable" notices or unexpected behavior in your code. To solve this issue, make sure to always define your variables before using them in your code. This can be done by initializing the variable with a default value or assigning a value to it before using it. 

// Define the variable before using it
$variable = "";

// Now you can safely use the variable
echo $variable;

Keywords

Undefined variable PHP error Notice Scope Variable initialization

Related Questions