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php绘图之在图片上写中文和英文的方法,
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php绘图之在图片上写中文和英文的方法,

Jun 13, 2016 am 09:16 AM
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php绘图之在图片上写中文和英文的方法,

本文实例讲述了php绘图之在图片上写中文和英文的方法。分享给大家供大家参考。具体如下:

第一种方法,只能写英文,中文会出现乱码

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。
$red = imagecolorallocate($im,255,0,0);
//2、写字
$str = "hello,world";
imagestring($im,5,30,60,$str,$red);//参数说明:5-指文字的大小。函数 imagestring 不能写中文
//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);
?>

第二种方法:写中文

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。
$red = imagecolorallocate($im,255,0,0);
//2、写字
$str = iconv("gb2312","utf-8","北京,你早!hello,world");//文件格式为gbk,而这里转为uft-8格式,才能正常输出,否则也为乱码。表示不明
imagettftext($im,12,rand(0,20),20,100,$red,"simhei.ttf",$str);
//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);
?>


imagettftext() 函数远强于imagestring() 函数,表现在这几个方面:

(1)imagettftext() 可以输出中文和英文,可以指定字体;imagestring() 只能输出英文,只能使用默认字体。
(2)imagettftext() 字体大小可以无限大;imagestring() 字体只有1~5号大小。
(3)imagettftext() 输出的字体可以变换角度;imagestring() 只能水平输出。

希望本文所述对大家的php程序设计有所帮助。

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