Roe Builder mk11 TILESTEST 100% OK

<?php

$filename = 'dtbykick';
$alpha = 127;

combo($filename, $alpha);

echo '<html><head><title>'. $filename. '</title></head><body style="background-color:springgreen;"><h3>'. htmlentities( $filename ). '</h3><img src="./tiles src data/rgb/'. $filename. '.bmp"><img src="./tiles src data/mask/'. $filename. '.bmp"><img src="./tiles out data/combo/'. $filename. '.png"></body></html>';

function combo($filename='dtbykick', $alpha = 127 )
{
    //$filename='dtbykick';

    $image[ 'rgb' ] = imagecreatefrombmp( $_SERVER['DOCUMENT_ROOT']. '/Roe XAMPP Builder/tiles src data/rgb/'.$filename.'.bmp' );

    $image[ 'mask' ] = imagecreatefrombmp( $_SERVER['DOCUMENT_ROOT']. '/Roe XAMPP Builder/tiles src data/mask/'.$filename.'.bmp' );

    //imagepng( $image['combo'],'./'.$filename.'-combo.png' );

    $image [ 'combo' ] = imagecreatetruecolor( imagesx( $image[ 'rgb' ] ), imagesy( $image[ 'rgb' ] ) );

    imagesavealpha( $image [ 'combo' ], true);

    $trans_colour = imagecolorallocatealpha( $image [ 'combo' ], 0, 0, 0, 127 );
    imagefill( $image [ 'combo' ], 0, 0, $trans_colour );

    $width = imagesx( $image[ 'combo' ] );
    $height = imagesy( $image[ 'combo' ] );

    //loop through width and height of source image
    $row=0;
    while( $row < $height )
    {
        $col=0;
        while( $col < $width )
        {

            //get color in image $image[ 'mask' ] at pixel ($col, $row)

            $pix[ 'mask' ] = imagecolorat( $image[ 'mask' ], $col, $row );

            //get color in image $image[ 'rgb' ] at pixel ($col, $row)

            $pix[ 'rgb' ] = imagecolorat( $image[ 'rgb' ], $col, $row );

            //if pixel in $image['mask'] at ($cow, $row) is white:

            if ( ( $pix[ 'mask' ] & 0xFFFFFF ) === 0xFFFFFF )
            {
                //set pixel based on Mask layer's ($col, $row) as fully transparent
                $pix[ 'combo' ] = alphaColor("FFFFFF", $alpha );
            }
            //else
            else
            {
                //set pixel based on RGB layer's ($col, $row) with full opacity
                $pix[ 'combo' ] = $pix[ 'rgb' ];
            }

            //assign pixel data to $image['combo'] at ($col , $row)
            imagesetpixel( $image[ 'combo' ], $col, $row, $pix[ 'combo' ] );

            if( $col === $width - 1 )
            {
                break;
            }
            $col++;
        }
        if( $row === $height - 1 )
        {
            break;
        }
        $row++;
    }

    //save resulting image as new file
    imagepng( $image[ 'combo' ], $_SERVER['DOCUMENT_ROOT']. '/Roe XAMPP Builder/tiles out data/combo/'. $filename. '.png' );
}

function alphaColor($hexColor,$alpha)
{
        return bindec(decbin($alpha).decbin(hexdec($hexColor)));
}

?>