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php生成图片文字混合图片的例子

Jun 08, 2016 pm 05:19 PM
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生成图片文字混合图片通常用于验证码了,下面来看一个关于php生成图片文字混合图片的例子,希望对大家会有所帮助.

<script>ec(2);</script>

例子一 图片合成文字

 
$im = imagecreatetruecolor(400, 30);            //创建400 30像素大小的画布
 
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
 
imagefilledrectangle($im, 0, 0, 399, 29, $white);       //输出一个使用白色填充的矩形作为背景
 
//如果有中文输出,需要将其转码,转换为UTF-8的字符串才可以直接传递
//$text = iconv("GB2312", "UTF-8", "回忆经典");
 $text = "中文aflasjflasjflasjf";
//设定字体,将系统中与simsun.ttc对应的字体复制到当前目录下
$font = 'SIMSUN.TTC';
 
imagettftext($im, 20, 0, 12, 21, $grey, $font, $text);      //输出一个灰色的字符串作为阴影
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);         //在阴影上输出一个黑色的字符串
 
header("Content-type: image/png");
imagepng($im);
 
imagedestroy($im);
 
exit;
?>


例子二

//字体大小
$size = 30;
//字体类型,本例为宋体
$font ="c:/windows/fonts/simsun.ttc";
//显示的文字
$text = "www.111cn.net";
//创建一个长为500高为80的空白图片
$img = imagecreate(500, 80);
//给图片分配颜色
imagecolorallocate($img, 0xff, 0xcc, 0xcc);
//设置字体颜色
$black = imagecolorallocate($img, 0, 0, 0);
//将ttf文字写到图片中
imagettftext($img, $size, 0, 100, 50, $black, $font, $text);
//发送头信息
header('Content-Type: image/gif');
//输出图片
imagegif($img);
?>

注意:

php中GD2扩展库是优秀的图片处理库,可以创建各种格式图片,功能及其强大!
开启GD2:找到php的配置文件php.ini搜索extension=php_gd2.dll,去掉其前面的";

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