What are some common pitfalls when checking if a PHP return array contains any values?

One common pitfall when checking if a PHP return array contains any values is mistakenly using empty() or count() functions, which may not accurately determine if the array has elements. To accurately check if an array has values, you should use the empty() function in conjunction with isset() to ensure that the array is set and not null. 

// Check if the return array contains any values
if (isset($array) && !empty($array)) {
    // Array has values
    echo "Array contains values";
} else {
    // Array is empty or not set
    echo "Array is empty or not set";
}

Keywords

empty array_key_exists isset count in_array

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