How can the issue of undefined variables be resolved in PHP code?

Issue: Undefined variables in PHP code can be resolved by initializing variables before using them to avoid errors. This can be done by assigning default values or checking if the variable is set before using it. Example PHP code snippet: 

// Initialize variable with a default value
$variable = '';

// Check if the variable is set before using it
if (isset($variable)) {
    // Code that uses the variable
}

Keywords

undefined variables error handling isset function error_reporting debugging

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