Are there best practices for comparing keys and values in associative arrays in PHP?

When comparing keys and values in associative arrays in PHP, it is important to use the correct comparison operators to ensure accurate results. Best practices include using strict comparison operators (===) to compare both keys and values, as this will check for both value and type equality. This prevents unexpected results that may occur when using loose comparison operators (==) which only check for value equality.

$assocArray = array("key1" => 1, "key2" => 2, "key3" => 3);

// Comparing keys using strict comparison operator
if (array_key_exists("key1", $assocArray)) {
    echo "Key 'key1' exists in the array.";
}

// Comparing values using strict comparison operator
if (in_array(2, $assocArray, true)) {
    echo "Value 2 exists in the array.";
}