What are the potential pitfalls of using the extract() function in PHP, and how can warnings like "First argument should be an array" be addressed?

Using the extract() function in PHP can lead to potential pitfalls such as overwriting existing variables, making debugging difficult, and increasing the risk of variable naming conflicts. To address warnings like "First argument should be an array," ensure that the argument passed to extract() is indeed an array. 

// Addressing the warning "First argument should be an array" when using extract()
$data = array("name" => "John", "age" => 30);

if (is_array($data)) {
    extract($data);
    // Now $name and $age variables are available for use
} else {
    // Handle the case when $data is not an array
    echo "Data must be an array.";
}

Keywords

extract PHP function array warning

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