How to extract all keys or values from an associative array in PHP?

To extract all keys or values from an associative array in PHP, you can use the array_keys() or array_values() function respectively. Here's an example:

// An example associative array
$fruits = array(
    "apple" => "red",
    "banana" => "yellow",
    "orange" => "orange"
);

// Extracting all the keys
$keys = array_keys($fruits);

// Extracting all the values
$values = array_values($fruits);

// Printing the keys and values
print_r($keys);
print_r($values);

Output:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)
Array
(
    [0] => red
    [1] => yellow
    [2] => orange
)

In this example, array_keys() is used to extract all the keys from the $fruits array, and array_values() is used to extract all the values. The resulting keys and values are then printed using print_r().