Variable handling Functions
PHP Manual

is_bool

Finds out whether a variable is a boolean

Description

bool is_bool(mixed $value)

Finds whether the given variable is a boolean.

Parameters

value

The variable being evaluated.

Return Values

Returns true if value is a bool, 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
  • is_int
  • is_string
  • is_object
  • is_array