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PhpCompiler.class.php

<?php

define( "START_TAG" , "/"."*NODEBUG{*"."/" );
define( "END_TAG"   , "/"."*}NODEBUG*"."/" );

class PhpCompiler
{
    var $_UseMakeLibrary;

    var $_UseNoDebugCode;

    var $_UsePhpScrub;

    function & PhpCompiler()
    {
        $this->_UseMakeLibrary = FALSE;
        $this->_UseNoDebugCode = TRUE;
        $this->_UsePhpScrub    = TRUE;
        return($this);
    }

    function ChangeMode($NewModes=array())
    {
        $name_conversion = array(
            "library"    => "_UseMakeLibrary",
            "nodebug"    => "_UseNoDebugCode",
            "whitespace" => "_UsePhpScrub",
            );

        if(!is_array($NewModes))
        {
            return(FALSE);
        }

        foreach($NewModes as $Name => $Value)
        {
            if(!isset($name_conversion[$Name]))
            {
                return(FALSE);
            }

            if(!is_bool($Value))
            {
                return(FALSE);
            }

            $Name = $name_conversion[$Name];
            $this->$Name = $Value;
        }

        return(TRUE);
    }

    function GetModes()
    {
        return(array(
            array(
                "Name"        => "library",
                "Default"     => FALSE,
                "Description" =>
                    "Remove extra newlines and php tags"
                ),
            array(
                "Name"        => "nodebug",
                "Default"     => TRUE,
                "Description" =>
                    "Remove /*NODEBUG{*/.../*}NODEBUG*/ blocks"
                ),
            array(
                "Name"        => "whitespace",
                "Default"     => TRUE,
                "Description" =>
                    "Pass through 'php -w'"
                ),
            ));
    }

    function GetErrors()
    {
        return(array());
    }

    function Compile($Input)
    {
        if(!is_string($Input))
        {
            return("");
        }

        if($this->_UseNoDebugCode)
        {
            $Input = $this->NoDebugCode($Input);
        }
        if($this->_UsePhpScrub)
        {
            $Input = $this->PhpScrub($Input);
        }
        if($this->_UseMakeLibrary)
        {
            $Input = $this->MakeLibrary($Input);
        }

        return($Input);
    }

    function MakeLibrary($Input)
    {
        $replace = array(
            '/\n/s'         => ''          , # Remove all newlines
            '/\<\?'.'php/s' => ''          , # Remove all open  tags
            '/\?\>/s'       => ''          , # Remove all close tags
            '/^/s'          => '<?'.'php ' , # Add beginning open  tag
            '/$/s'          => ' ?'.'>'    , # Add ending    close tag
            );

        $Input = preg_replace(
                array_keys($replace),
                array_values($replace),
                $Input
                );

        return($Input);
    }

    function NoDebugCode($Input)
    {
        $strlen = strlen($Input);
        $inblock = FALSE;
        $return = "";
        $block = "";
        for($x = 0; $x < $strlen; $x++)
        {
            if(START_TAG == substr($Input, $x, strlen(START_TAG)))
            {
                if($block)
                {
                    $return .= $block;
                    $block = "";
                }

                $inblock = TRUE;
            }
            if(END_TAG == substr($Input, $x, strlen(END_TAG)))
            {
                if($inblock)
                {
                    $inblock = FALSE;
                    $block = "";
                    $x += strlen(END_TAG);
                }
            }
            if(!$inblock)
            {
                $return .= $Input[$x];
            }
            else
            {
                $block .= $Input[$x];
            }
        }

        if($return !== $Input)
        {
            return($this->NoDebugCode($return));
        }

        return($return);
    }

    function PhpScrub($Input)
    {
        $Input = escapeshellarg($Input);
        $Command = "echo $Input | php -w ";
        $Return = shell_exec($Command);
        return($Return);
    }
}

return("PhpCompiler");

?>

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