| AND OR | string words | *
array handling
communication
databases
directories
file handling
forms
html and code
image editing
image handling
information
sessions and co
string handling
manual for is_bool | search for "is_bool"

is_bool

(PHP 4 , PHP 5)

is_bool --  Finds out whether a variable is a boolean

Description

bool is_bool ( mixed var)

Returns TRUE if the var parameter is a boolean.

Example 1. is_bool() examples

<?php
$a = false;
$b = 0;

// Since $a is a boolean, this is true
if (is_bool($a)) {
    echo "Yes, this is a boolean";
}

// Since $b is not a boolean, this is not true
if (is_bool($b)) {
    echo "Yes, this is a boolean";
}
?>

See also is_array(), is_float(), is_int(), is_integer(), is_string(), and is_object().

Manual © 2001-2008 The PHP Group
© 2008 phparadise | go to the top | search phparadise | generated in 0.026 seconds

43 hits by 13 users in the last 30 minutes.