is_bool
(PHP 4, PHP 5, PHP 7)
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,?it?will?return?true
if?(is_bool($a)?===?true)?{
????echo?"Yes,?this?is?a?boolean";
}
//?Since?$b?is?not?a?boolean,?it?will?return?false
if?(is_bool($b)?===?false)?{
????echo?"No,?this?is?not?a?boolean";
}
?>See Also
- is_float() - Finds whether the type of a variable is float
- is_int() - Find whether the type of a variable is integer
- is_string() - Find whether the type of a variable is string
- is_object() - Finds whether a variable is an object
- is_array() - Finds whether a variable is an array
← is_array
is_callable →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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