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PHP创建(中/英文字)图片

Jun 13, 2016 am 10:34 AM
php one time code Do share create picture letter Now of program Britain this

这个PHP代码是我做的一个程序的一部分,现在贴出来分享一下。这个代码的功能是创建一个图片,不但可以用自定义字体在图片上写英文,也可以写中文了!这个代码适用于验证码、给图片加水印等功能。

/*
Photozero.net 改编自PHP参考文档
*/

//设置Header,如果输出图片不成功,请先暂时去掉这代码,查看错误信息
header("Content-type: image/png");
header("Cache-Control: no-cache");

$zh_text = 黑体;
$en_text = Test;

//要输出的字
$zh_font = simhei.ttf;
$en_font = arial.ttf;

//字库的文件名。建议中文字体和E文字体用不一样的,因为宋体、黑体字库里的英文实在不咋滴
//这里用的都是TTF字体。懒得上网找就到 C:WINDOWSFonts 下,Copy几个字体到程序目录下就好了
// 创建一个真彩的图片背景,参数是 X长 ,Y宽。
$im = imagecreatetruecolor(400, 400);

//或者可以调用已有的PNG图片等 : $im = imagecreatefrompng(background.png);
// 定义几个色彩
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);

//填充背景为白色
imagefill($im, 0, 0, $white);

//将背景透明化
imagecolortransparent($im,$white);

//以上两行是创建透明图片的关键!
//很多人反应, imagecreatetruecolor创建后的图片,背景颜色是黑的,无论怎么修改都不能变成白色的
//我先将背景填充为白色,再做透明处理就可以了!在Firefox3和IE7下测试成功!
// 这是一个很简单的产生阴影的效果。
//先在原本要输出的位置的偏左下角一点点输出灰色的字体,接着再用黑色字体写上去就有阴影效果了
//下次再提供点别的花样~
//imagettftext($im, 20, 0, 11, 21, $grey, $en_font, $en_text);

// 写入字体
imagettftext($im, 12, 0, 100, 120, $black, $en_font, $en_text);
imagepng($im);
imagedestroy($im);

// 不用说了,输出图片,然后清除缓存
//函数都是用PHP内置的,如果有不了解的请参考一下文档。
?>

整个代码的功能是比较单一的,但这是一个创建图片比较基本的框架。无论是做验证码还是要提供显示IP的服务,只要略微修改就很快能用了。就留着这代码备用吧,以后哪天说不定就用上了。

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