gistfile1.php

<?php
require_once './MethodSuggestion.php';

class SampleClass extends ArrayObject
{
    // Your code here ...

    /**
     * Add 3 lines as below to use method suggestion
     */
    public function __call($method, $args)
    {
        throw new MethodSuggestionException($method, $this);
    }
}

$sugestee = new SampleClass();
$sugestee->couunt();  // typo `couunt` not `count`


// This code will show following error message:
// PHP Fatal error:  Uncaught exception 'MethodSuggestionException' with message '`couunt` is not a valid method. Did you mean `count` ?' in /Users/keso/Dropbox/workspace/MethodSuggestionPHP/SampleClass.php:13

gistfile2.php

<?php

class MethodSuggestionException extends BadMethodCallException
{
    public function __construct($called_method, $that)
    {
        $this->suggest($called_method, get_class_methods($that));
    }

    protected function suggest($called_method, $methods)
    {
        $distance_hash = array();
        foreach ($methods as $method) {
            $distance_hash[$method] = levenshtein($called_method, $method);
        }
        asort($distance_hash);
        $this->setMessage(
            $called_method,
            key(array_slice($distance_hash, 0, 1, true))
        );
    }

    protected function setMessage($called_method, $similar_method)
    {
        $message = '';
        $message .= "`$called_method` is not a valid method. ";
        $message .= "Did you mean `$similar_method` ?";
        $this->message = $message;
    }
}