Variable handling Functions
PHP Manual

is_int

Find whether the type of a variable is integer

Description

bool is_int ( mixed $var )

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

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
  • is_float
  • is_numeric
  • is_string
  • is_array
  • is_object