What are some best practices for handling empty variables in PHP to avoid errors?

When dealing with empty variables in PHP, it's important to check if a variable is empty before performing operations on it to avoid errors. One way to handle empty variables is by using functions like `isset()` or `empty()` to check if a variable is set and not empty before using it in your code. Another approach is to use the null coalescing operator (`??`) to provide a default value if a variable is empty. 

// Using isset() to check if a variable is set and not empty
if(isset($variable) && !empty($variable)) {
    // Perform operations on $variable
}

// Using null coalescing operator to provide a default value if $variable is empty
$value = $variable ?? 'default value';

Keywords

empty variables error handling PHP functions isset null coalescing operator

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