What is the potential issue with using numbered variables in PHP?

Using numbered variables in PHP can lead to confusion and make the code harder to read and maintain. It is recommended to use descriptive variable names that convey the purpose of the variable. This practice improves code readability and makes it easier for other developers to understand the code.

// Bad practice using numbered variables
$var1 = 10;
$var2 = 20;

// Good practice using descriptive variable names
$firstNumber = 10;
$secondNumber = 20;