1--TEST-- 2Bug #79615 (Wrong GIF header written in GD GIFEncode) 3--SKIPIF-- 4<?php 5if (!extension_loaded('gd')) die('skip gd extension not available'); 6?> 7--FILE-- 8<?php 9$im = imagecreate(3, 3); // 3x3, 9 colors, 4 bits per pixel 10for ($x = 0; $x < 3; $x++) { 11 for ($y = 0; $y < 3; $y++) { 12 imagesetpixel($im, $x, $y, imagecolorallocate($im, $x, $y, 0)); 13 } 14} 15ob_start(); 16imagegif($im); 17echo decbin(ord(ob_get_clean()[0xA])); 18?> 19--EXPECT-- 2010110011 21