What are the potential pitfalls of not declaring variables before using them in PHP code?

Not declaring variables before using them in PHP code can lead to errors such as "Undefined variable" notices or unexpected behavior in the code. To avoid these pitfalls, it is recommended to always declare variables before using them to ensure clarity and prevent any issues with variable scope. 

// Declare the variable before using it
$variable = "Hello, World!";
echo $variable;

Keywords

undeclared variables PHP code error reporting debugging variable scope

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