imagecreatetruecolor
    (PHP 4 >= 4.0.6, PHP 5)
imagecreatetruecolor -- Create a new true color image
Description
resource 
imagecreatetruecolor ( int x_size, int y_size)
    imagecreatetruecolor() returns an image identifier
    representing a black image of size x_size
    by y_size.
   
    
Beispiel 1. 
      Creating a new GD image stream and outputting an image.
      
<?php header ("Content-type: image/png"); $im = @imagecreatetruecolor(50, 100)       or die("Cannot Initialize new GD image stream"); $text_color = imagecolorallocate($im, 233, 14, 91); imagestring($im, 1, 5, 5,  "A Simple Text String", $text_color); imagepng($im); imagedestroy($im); ?>
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   Anmerkung: This function requires GD 2.0.1 or later.
Anmerkung: 
     This function will not work with GIF file formats.
    
    See also imagedestroy() and
    imagecreate().