What are the potential pitfalls of using isempty() to check if a variable is empty in PHP?

Using `isempty()` to check if a variable is empty in PHP can lead to potential pitfalls because `isempty()` will return `true` for variables that are set but have a value of `0`, `false`, `null`, or an empty string. To accurately check if a variable is empty, it's better to use `isset()` to check if the variable is set and not `null`, and then use `empty()` to check if the variable has an empty value. 

// Check if a variable is empty
if(isset($variable) && !empty($variable)) {
    // Variable is not empty
} else {
    // Variable is empty
}

Keywords

isempty variable empty PHP pitfalls

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