Using PHP is_int() Function to Check Integer Variables

PHP is a widely used scripting language for web development that provides many built‑in functions, including is_int() , which checks whether a variable is an integer and returns a boolean.

The syntax of is_int() is:

bool is_int ( mixed $var )

The function accepts a single argument of any type and returns true if the argument is an integer, otherwise false .

Example 1 demonstrates three variables ($num1, $num2, $str) and uses var_dump(is_int(...)) to show the function returns true for the integer and false for a float and a string.

Example 2 defines three variables ($var1, $var2, $var3) and uses if (is_int(...)) statements to echo messages indicating whether each variable is an integer.

In summary, is_int() is a useful PHP function for quickly determining if a variable holds an integer, which helps developers handle different data types appropriately.