Using PHP is_int() Function to Check Integer Variables
This article explains the PHP is_int() function, its syntax, and provides clear code examples demonstrating how to determine whether variables are integers, helping developers correctly handle different data types in backend development.
PHP provides the built‑in is_int() function to determine whether a variable is of integer type, returning true for integers and false otherwise.
The function signature is bool is_int ( mixed $var ) , where $var can be any type.
Example 1 defines three variables—a integer, a float, and a string—and uses var_dump(is_int(...)) to show the function returns true only for the integer.
Example 2 creates three variables of different types and uses if (is_int(...)) { echo "..."; } else { echo "..."; } to output messages indicating whether each variable is an integer.
In summary, is_int() is a useful PHP function for quickly checking variable types, helping developers handle data appropriately in backend applications.
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