is_int

    (PHP 4, PHP 5, PHP 7, PHP 8)

    is_int — Find whether the type of a variable is integer

    Description

    is_int(mixed$value): bool

    Finds whether the type of the given variable is integer.

    Note:

    To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric().

    Parameters

    value

    The variable being evaluated.

    Return Values

    Returns true if value is an int, false otherwise.

    Examples

    Example #1 is_int() example

    <?php
    $values     = array(23, "23", 23.5, "23.5", null, true, false);
    foreach (    $values as $value) {
    echo     "is_int(";
    var_export($value);
    echo     ") = ";
    var_dump(is_int($value));
    }
    ?>

    The above example will output:

    is_int(23) = bool(true) is_int('23') = bool(false) is_int(23.5) = bool(false) is_int('23.5') = bool(false) is_int(NULL) = bool(false) is_int(true) = bool(false) is_int(false) = bool(false)

    See Also

    • is_bool() - Finds out whether a variable is a boolean
    • is_float() - Finds whether the type of a variable is float
    • is_numeric() - Finds whether a variable is a number or a numeric string
    • is_string() - Find whether the type of a variable is string
    • is_array() - Finds whether a variable is an array
    • is_object() - Finds whether a variable is an object
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