iphp.php

<?php

class ErrorHandler
{
    public static function initalize()
    {
        set_error_handler( array("ErrorHandler", "handle") );
    }
    
    public static function handle($errno, $errstr, $errfile, $errline, $errcontext)
    {
        throw new Exception($errstr, $errline);
    }
}

class CodeInterpreter
{
    private $console = null;
    private $currentCode = "";
    
    public $blocks = 0;
    
    public function __construct($console)
    {
        $this->console = $console;
    }
    
    public function run($code)
    {
        $this->currentCode .= $code;
        
        if( strpos($code,"{") !== false )
        {
            $this->blocks++;
        }

        if( strpos($code,"}") !== false )
        {
            $this->blocks--;
        }        
        
        if( $this->blocks == 0 )
        {
            $b = $this->currentCode;
            $this->currentCode = "";
            return $b;
        }
    }
}

class Console
{
    private $ci = null;
    
    public function __construct()
    {
        $this->ci = new CodeInterpreter(&$this);
        
        ErrorHandler::initalize();
    }
    
    public function run()
    {
        while( true )
        {
            for( $i=0;$i<=$this->ci->blocks;$i++ )
            {
                echo ">>";
            }
            echo " ";
            
            $stdin = fopen("php://stdin", "r");
            $input = fgets($stdin,1024*1024);
            fclose($stdin);
            
            if( $input == 'quit' || $input == 'exit' )
            {
                break;
            }
            
            $o = $this->ci->run($input);
            
            if( $o )
            {
                try
                {
                    eval($o);
                }
                catch( Exception $e )
                {
                    $this->exception($e);
                }
            }
        }
    }
    
    public function exception($e)
    {
        echo "Exception:\t\t" . $e->getMessage() . "\n\t\tfrom " . $e->getFile() . ":" . $e->getLine() . "\n";
        
    }
}

$c = new Console;
$c->run();