Syntax:bool ReflectionClass::hasConstant (string $name)
Parameters:This function takes one parameter
$name,which contains the name of a specific constant.
Return value:This function returns TRUE if constant is defined, FALSE otherwise.The following programs illustrate the ReflectionClass::hasConstant() function in PHP:
Program 1:
// Define a custom class Company
class
Company {
const
c1 =
’ GeeksforGeeks’
;
}
// Using ReflectionClass over
// defined custom Company class
$constant
=
new
ReflectionClass (
"Company"
);
// Calling the hasConstant() function
$const
=
$constant
-> hasConstant (
" c1 "
);
// Get TRUE or FALSE
var_dump (
$const
);
?>
Exit:bool (true )
Program 2:
// Define an empty class
class
Company {
}
// Using ReflectionClass over
// defined custom Company class
$constant
=
new
ReflectionClass (
"Company"
);
// Calling the hasConstant() function and
// get TRUE or FALSE
var_dump (
$constant
-> hasConstant (
"c1"
));
?>
Exit:bool (false )
Link: https://secure.php.net /manual/en/reflectionclass.hasconstant.php