The PHP is_string() function is used to find whether a certain value is a string type.
The function syntax is as follows:
is_string(mixed $value): bool
This function accepts a value and returns true when that value is string type. Otherwise, it returns false.
Here are some examples of calling the function:
// 👇 pass variable to is_string
$int = 7;
var_dump(is_string($int)); // bool(false)
$str = "Hi";
var_dump(is_string($str)); // bool(true)
// 👇 pass direct value to is_string
var_dump(is_string([1, 3])); // bool(false)
var_dump(is_string(["H", "A"])); // bool(false)
var_dump(is_string(NULL)); // bool(false)
var_dump(is_string("789")); // bool(true)
Use the is_string() function when you need to check whether a variable is a string.
The returned boolean value can be used in an if-else conditional statement 👍