What is the difference between if (in_array...) and if (!in_array...) in PHP?

When using if (in_array...), the condition will be true if the specified value is found in the array. On the other hand, if (!in_array...), the condition will be true if the specified value is not found in the array. This allows you to check for the absence of a value in the array. Example: if (in_array($value, $array)) { // Value is found in the array } if (!in_array($value, $array)) { // Value is not found in the array }