module_icon.php

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<?php
// start hack by Trabis
if (!class_exists('ProtectorRegistry')) exit('Registry not found');

$registry   =& ProtectorRegistry::getInstance();
$mydirname  = $registry->getEntry('mydirname');
$mydirpath  = $registry->getEntry('mydirpath');
$language   = $registry->getEntry('language');
// end hack by Trabis

$icon_cache_limit = 3600 ; // default 3600sec == 1hour

session_cache_limiter('public');
header("Expires: ".date('r',intval(time()/$icon_cache_limit)*$icon_cache_limit+$icon_cache_limit));
header("Cache-Control: public, max-age=$icon_cache_limit");
header("Last-Modified: ".date('r',intval(time()/$icon_cache_limit)*$icon_cache_limit));
header("Content-type: image/png");

// file name
if( ! empty( $_GET['file'] ) ) {
        $file_base = preg_replace( '/[^0-9a-z_]/' , '' , $_GET['file'] ) ;
} else {
        $file_base = 'module_icon' ;
}

$draw_dirname = true ;

// icon files must be PNG
$file = $file_base . '.png' ;

// custom icon
if( file_exists( $mydirpath.'/'.$file ) ) {
        $draw_dirname = false ;
        $icon_fullpath = $mydirpath.'/module_icon.png' ;
} else {
        $icon_fullpath = dirname(__FILE__).'/images/'.$file ;
}

if( $draw_dirname && function_exists( 'imagecreatefrompng' ) && function_exists( 'imagecolorallocate' ) && function_exists( 'imagestring' ) && function_exists( 'imagepng' ) ) {

        $im = imagecreatefrompng( $icon_fullpath ) ;

        $color = imagecolorallocate( $im , 0 , 0 , 0 ) ; // black
        $px = ( 92 - 6 * strlen( $mydirname ) ) / 2 ;
        imagestring( $im , 3 , $px , 34 , $mydirname , $color ) ;
        imagepng( $im ) ;
        imagedestroy( $im ) ;

} else {

        readfile( $icon_fullpath ) ;

}

?>