How can the foreach loop be optimized to correctly display all variables passed via $_POST in PHP?

When using a foreach loop to iterate over variables passed via $_POST in PHP, it is important to ensure that the loop is correctly accessing each variable. One common mistake is not using the key-value pair syntax of foreach loop when dealing with $_POST data. To optimize the foreach loop to correctly display all variables passed via $_POST, make sure to use the key-value pair syntax to access and display each variable.

foreach ($_POST as $key => $value) {
    echo $key . ": " . $value . "<br>";
}