How can undefined function errors be avoided when accessing variables through $_GET in PHP?

When accessing variables through $_GET in PHP, it's important to check if the variable is set before using it to avoid undefined function errors. This can be done using the isset() function to determine if the variable exists in the $_GET array. By checking if the variable is set before accessing it, you can prevent errors and ensure that your code runs smoothly. 

if(isset($_GET['variable_name'])){
    $variable = $_GET['variable_name'];
    // Use $variable safely here
} else {
    // Handle case when variable is not set
}

Keywords

$_GET undefined function error handling isset PHP

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