How can array_unique() function in PHP be utilized to check for uniqueness among multiple variables?

When dealing with multiple variables in PHP, if you want to check for uniqueness among them, you can utilize the array_unique() function. This function removes duplicate values from an array, leaving only unique values. By passing all the variables to this function and comparing the resulting array count with the original count of variables, you can determine if there are any duplicates present.

// Example of using array_unique() to check for uniqueness among multiple variables
$var1 = "apple";
$var2 = "banana";
$var3 = "apple";

$allVariables = array($var1, $var2, $var3);
$uniqueVariables = array_unique($allVariables);

if(count($allVariables) != count($uniqueVariables)) {
    echo "Duplicates found among variables!";
} else {
    echo "No duplicates found among variables!";
}