What is the purpose of using isset() to check variables in PHP scripts?

When working with PHP scripts, it is important to check if a variable has been set before trying to use it to avoid potential errors or warnings. The isset() function in PHP allows you to determine if a variable is set and is not NULL. By using isset() to check variables before using them, you can ensure that your code runs smoothly and prevent any unexpected issues. 

// Check if the variable $name is set before using it
if(isset($name)) {
    echo "The variable name is set and its value is: " . $name;
} else {
    echo "The variable name is not set.";
}

Keywords

isset variables PHP scripts error handling conditional statements

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