is_bool
(PHP 4, PHP 5)
is_bool --
Finds out whether a variable is a boolean
Description
bool
is_bool ( mixed var )
Finds whether the given variable is a boolean.
Parameters
- var
The variable being evaluated.
Return Values
Returns TRUE if var is a boolean,
FALSE otherwise.
Examples
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";
}
?>
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