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@ 2013-12-01T21:22:55Z

<?php

abstract class Super {

    private $aliases;

    protected function __construct(array $aliases) {
        $this->aliases = $aliases;
    }

    public function __call($name, $arguments) {

		echo "Calling virtual method $name...\n";

        /* if $name is an alias, replace it */
        if (isset($this->aliases[$name])) {
            $name = $this->aliases[$name];
			echo "That's an alias for $name...\n";
        }

        /* throw an exception if the method is undefined */
        if (!method_exists($this, $name)) {
            throw new Exception("The specified method or method alias is undefined in the current context");
        }

        /* finally, call the method by its actual name */
        return $this->$name($arguments);
    }

}

class Sub extends Super {

    public function __construct() {
        parent::__construct(array(
            "alias" => "actualMethod"
        ));
    }

    public function actualMethod() {
        echo "Inside the actual method\n";
    }

}

$sub = new Sub;
$sub->alias();

Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Calling virtual method alias... That's an alias for actualMethod... Inside the actual method
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/rkEs5 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_CLASS in /in/rkEs5 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_CLASS in /in/rkEs5 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/rkEs5 on line 3
Process exited with code 255.

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