Find whether the type of a variable is integer (original) (raw)

is_int

(PHP 4, PHP 5, PHP 7)

is_int — Find whether the type of a variable is integer

Description

is_int ( mixed $var ) : bool

Note:

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

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is an integer,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