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is_bool

Finds out whether a variable is a boolean (PHP 4, PHP 5)
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 2589. 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";
}
?>