php画图实例,画图实例
本文实例讲述了php画图的方法。分享给大家供大家参考。具体实现方法如下:
复制代码 代码如下:
// by MoreWindows
$imgWidth = 600;
$imgHeight = 400;
$img = imagecreatetruecolor($imgWidth, $imgHeight);
imagefill($img, 0, 0, imagecolorallocate($img, 240, 240, 240));//设置底色
$snowflake_size = 30;
$font_file = "c:\\WINDOWS\\Fonts\\simhei.ttf";
//生成大雪花 其实就是调用imagettftext()输出*号
for ($i=1; $i
{
$font_color = imagecolorallocate($img, mt_rand(100,200), mt_rand(100,200), mt_rand(100,200));
imagettftext($img, $snowflake_size, mt_rand(0, 180), mt_rand(0, $imgWidth),mt_rand(0, $imgHeight), $font_color, $font_file, "□");
}
//水印文字
$black_color = imagecolorallocate($img, 0, 0, 0);
imagettftext($img, 12, 0, $imgWidth - 50 , $imgHeight - 20, $black_color, $font_file, "PHP画图");
imagepng($img);
imagedestroy($img);
?>
本实例运行效果如下图所示
更多请参考:
http://www.php.net/manual/zh/refs.utilspec.image.php
希望本文所述对大家的PHP程序设计有所帮助。
先把header放在最前面,再试下。如果不行,请回报错误。
header("Content-Type:image/gif");
$img=imagecreatetruecolor(50,50);
1)首先检查自己的PHP又没有开始GD库的支持。如果是windows系统,
直接把php.ini中extension=php_gd2.dll前面的分号去掉就行。
如果是linux系统,请查php参考手册关于GD库的安装说明
2)代码示例如下:
// 创建一个520*300的图片,
$im = imagecreatetruecolor(520, 300);
imagefilledrectangle($im, 0, 0, 520, 300, 0xFFFFFF);
imageline($im,10,270,510,270,0x000000);
......
// Save the image to file and free memory
imagepng($im, 'photo_stamp.png');
imagedestroy($im);
?>
3) 依次画其他系统即可。

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