PHP | is_real() Function

The is_real() function is an inbuilt function in PHP which is used to check the given value is a real number or not.

Syntax:

bool is_real( mixed $var )

Parameters: This function accepts one parameter as mentioned above and described below:

• $var: It contains the value of variable that need to be check.

Return Value: It returns TRUE if the given value of variable is real number, FALSE otherwise.

Program 1:

<?php
// PHP code to demonstrate
// the is_real() function

function square($num) {
    return (is_real($num));
}

var_dump(square(9.09));
var_dump(square(FALSE));
var_dump(square(14));
var_dump(square(56.30));

?>

Output:

bool(true)
bool(false)
bool(false)
bool(true)

Program 2:

<?php
// PHP program to demonstrate the
// is_real() function

$variable_name1 = 67.099;
$variable_name2 = 32;
$variable_name3 = "abc";
$variable_name4 = FALSE;

// Check given variable is real number or not
if (is_real($variable_name1))
    echo "$variable_name1 is a real value. \n";
else
    echo "$variable_name1 is not a real value. \n";

// Check given variable is real number or not
if (is_float($variable_name2))
    echo "$variable_name2 is a real value. \n";
else
    echo "$variable_name2 is not a real value. \n";

// Check given variable is real number or not
if (is_float($variable_name3))
    echo "$variable_name3 is a real value. \n";
else
    echo "$variable_name3 is not a real value. \n";

// Check given variable is real number or not
if (is_float($variable_name4))
    echo "FALSE is a real value. \n";
else
    echo "FALSE is not a real value. \n";
?>

Output:

67.099 is a real value. 
32 is not a real value. 
abc is not a real value. 
FALSE is not a real value.

Reference: https://www.php.net/manual/en/function.is-real.php