What is the significance of using isset() function in PHP when checking variables like $_GET['section']?

When checking variables like $_GET['section'] in PHP, it is important to use the isset() function to determine if the variable is set and not null before using it. This helps prevent errors and warnings in your code, especially when dealing with user input from forms or URLs. By using isset(), you can ensure that the variable exists before trying to access its value. 

if(isset($_GET['section'])){
    $section = $_GET['section'];
    // Proceed with using $section variable
} else {
    // Handle case when $_GET['section'] is not set
}

Keywords

isset PHP function variables $_GET

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