[RESOLVED] adding a function to a class dynamically

[Mgccl]

I tired and failed...
I don't see anyway of adding a function to a class dynamically. I wrote a class like this

class bcext{
function __construct(){
    $this->bcext();
}
function bcext($load = 1){
    if($load == 1){
        $dir = scandir('plugin/');
        foreach($dir as $key => $var){
            if($key != 0 && $key != 1){
                include('plugin/'.$var);
    }
}

All the php files in the plugin directory are ones contain functions, like this:

function foo(){
     echo 'bar';
}

This results of creating an function in the global scope, and not under the class's scope.
So what if I want to create a function dynamically in the class scope?

[NogDog]

All I can think of:

$class = "class bcext{\n";

$dir = scandir('plugin/');
foreach($dir as $key => $var){
   if($key != 0 && $key != 1){
      $class .= file_get_contents('plugin/'.$var) ."\n";
   }
}
$class .= '}';

eval($class);

[Shrike]

Languages like Ruby have in-built support for Mixins, which is what you want. Something roughly similar could be hacked up using PHP's lambda function support.

Never tried to write this sort of thing before, but here is something that might work

class MixinFaker
{
	private
		$funcs = array();
	/**
	 * Creates an anonymous (lambda) function on the $func array
	 */
	public function addFunction( $name, $args, $code )
	{
		$this->funcs[$name] = create_function( $args, $code );
	}
	/**
	 * Looks like your using so PHP5 so heres the __call magic to make the
	 * lambda functions appear to be part of the class
	 */
	public function __call( $name, $args )
	{
		if( array_key_exists( $name, $this->funcs ))
		{
			return call_user_func_array( $this->funcs[$name], $args );
		}
		return false;
	}
}
$fake = new MixinFaker();
$fake->addFunction( 'add', '$a', 'return ++$a;' );
$fake->addFunction( 'replace', '$a, $b, $c', 'return str_replace( $a, $b, $c );' );

echo '1 + 1 = ' .
$fake->add( 1 ) . '<br>';

echo 'String replacement: ' .
$fake->replace( array( 'cats', 'dogs' ), array( 'hats', 'cogs' ), 'It was raining cats and dogs' );

Which outputs

1 + 1 = 2
String replacement: It was raining hats and cogs