What is the purpose of using isset() in PHP and how can it help in error handling?

Using isset() in PHP helps to check if a variable is set and is not NULL. This can be useful in error handling to prevent undefined variable errors and ensure that the code runs smoothly without unexpected interruptions. 

// Check if the variable is set before using it
if(isset($variable)){
    // Perform operations using the variable
    echo $variable;
} else {
    // Handle the case where the variable is not set
    echo "Variable is not set";
}

Keywords

isset PHP error handling variable null

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