How can you properly check if a variable is empty in PHP?

To properly check if a variable is empty in PHP, you can use the empty() function. This function returns true if the variable is empty, false otherwise. It considers a variable as empty if it does not exist, or if its value equals false, 0, an empty string, null, an empty array, or an object with no properties. 

// Check if a variable is empty
$variable = ''; // variable to check

if (empty($variable)) {
    echo 'Variable is empty';
} else {
    echo 'Variable is not empty';
}

Keywords

PHP variable empty isset is_null

Related Questions