(PHP 5 >= 5.1.0, PHP 7)
Checks if constant is defined
public bool ReflectionClass::hasConstant ( string $name )
Checks whether the class has a specific constant defined or not.
Parameters:
name
The name of the constant being checked for.
Returns:
TRUE if the constant is defined, otherwise FALSE.
Examples:
ReflectionClass::hasConstant() example
<?php
class Foo {
const c1 = 1;
}
$class = new ReflectionClass("Foo");
var_dump($class->hasConstant("c1"));
var_dump($class->hasConstant("c2"));
?>
The above example will output something similar to:
bool(true) bool(false)
See also:
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