Php Check If a Static Class is Declared

Question

How can i check to see if a static class has been declared? ex Given the class

class bob {
    function yippie() {
        echo \"skippie\";
    }
}
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Answer 1

You can also check for existence of a specific method, even without instantiating the class

echo method_exists( bob, 'yippie' ) ? 'yes' : 'no';

If you want to go one step further and verify that "yippie" is actually static, use the Reflection API (PHP5 only)

try {
    $method = new ReflectionMethod( 'bob::yippie' );
    if ( $method->isStatic() )
    {
        // verified that bob::yippie is defined AND static, proceed
    }
}
catch ( ReflectionException $e )
{
    //  method does not exist
    echo $e->getMessage();
}

or, you could combine the two approaches

if ( method_exists( bob, 'yippie' ) )
{
    $method = new ReflectionMethod( 'bob::yippie' );
    if ( $method->isStatic() )
    {
        // verified that bob::yippie is defined AND static, proceed
    }
}

Answer 2

bool class_exists( string $class_name [, bool $autoload ])

This function checks whether or not the given class has been defined.