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PHP is_bool

PHP original manual for is_bool [ show | php.net ]

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