How to check if a value exists in PHP array

In this tutorial, we are going to learn about how to check if a given value exists or not in an array in PHP.

Using in_array() function

To check if a value is exists in array or not, we can use the built-in in_array() function in PHP.

The in_array() function takes two arguments, the first argument is search value, the second argument is array itself and it returns true if a value is found in array; otherwise it returns false.

Here is an example:

$cars = array("Audi", "BMW", "Benz");;

if (in_array("BMW", $cars)) {
  echo "value is found";
}else{
  echo "value is not found";
}

Output:

"value is found"

False case example:

$cars = array("Audi", "BMW", "Benz");;

if (in_array("ford", $cars)) {
  echo "value is found";
}else{
  echo "value is not found";
}

Output:

"value is not found"

In the above example, we have passed the search value "ford" which is not available in $cars array so it returns output value is not found.