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php绘制一个矩形的方法,php绘制矩形方法

本文实例讲述了php绘制一个矩形的方法。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:

//1、创建画布
$im = imagecreatetruecolor(300,200);//新建一个真彩色图像,默认背景是黑色,返回图像标识符。另外还有一个函数 imagecreate 已经不推荐使用。
//2、绘制所需要的图像
$red = imagecolorallocate($im,255,0,0);//创建一个颜色,以供使用
imagerectangle($im,30,30,240,140,$red);//画一个矩形。参数说明:30,30表示矩形左上角坐标;240,140表示矩形右下角坐标;$red表示颜色
//imagefilledrectangle($im,30,30,240,140,$red);//填充的矩形
//3、输出图像
header("content-type: image/png");
imagepng($im);//输出到页面。如果有第二个参数[,$filename],则表示保存图像
//4、销毁图像,释放内存
imagedestroy($im);
?>

希望本文所述对大家的php程序设计有所帮助。

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