<table width="200" border="0" cellspacing="2">

    <tr>

      <th scope="row"><img src="captcha/captcha.php" width="140" height="40" border="0" title="Sicherheitscode" /></th>

      <td><label><input type="text" name="sicherheitscode"; size="5" /></label></td>

    </tr>

 </table>

<?php 

// Informationen über die installierte GD-Grafikbibliothek anzeigen

$info = gd_info();

echo '<pre>';

print_r($info);

echo '</pre>';

?>

Array

(

    [GD Version] => 2.0 or higher

    [FreeType Support] => 1

    [FreeType Linkage] => with freetype

    [T1Lib Support] => 1

    [GIF Read Support] => 1

    [GIF Create Support] => 1

    [JPG Support] => 1

    [PNG Support] => 1

    [WBMP Support] => 1

    [XPM Support] => 

    [XBM Support] => 

    [JIS-mapped Japanese Font Support] => 

)

array(12) { 

["GD Version"]=>  string(13) "2.0 or higher" 

["FreeType Support"]=>  bool(true) 

["FreeType Linkage"]=>  string(13) "with freetype" 

["T1Lib Support"]=>  bool(true)

["GIF Read Support"]=>  bool(true) 

["GIF Create Support"]=>  bool(true) 

["JPG Support"]=>  bool(true) 

["PNG Support"]=>  bool(true) 

["WBMP Support"]=>  bool(true)

["XPM Support"]=>  bool(false) 

["XBM Support"]=>  bool(false) 

["JIS-mapped Japanese Font Support"]=>  bool(false) }