What is the significance of using isset() function in PHP error handling?

When handling errors in PHP, it is important to check if a variable is set before using it to avoid undefined variable errors. The isset() function is commonly used for this purpose as it checks if a variable is set and is not NULL. By using isset() in error handling, you can prevent errors caused by accessing variables that have not been initialized or defined. 

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

Keywords

isset PHP function error handling significance

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