如何使用PHP GD库向文本添加文本 [英] How to add text to an image with PHP GD library
本文介绍了如何使用PHP GD库向文本添加文本的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
<?php
header(Content-Type:图像/ JPEG);
$ im = ImageCreateFromGif(photo.gif);
$ black = ImageColorAllocate($ im,255,255,255);
$ start_x = 10;
$ start_y = 20;
Imagettftext($ im,12,0,$ start_x,$ start_y,$ black,'verdana.ttf',text to write);
Imagejpeg($ im,'',100);
ImageDestroy($ im);
?>
图像输出文件为image.php,代码如下
< html>
< head>
< / head>
< body>
< img src =http://localhost/image_creator.php/>
< / body>
< / html>
当我运行image.php时,我只是得到一个空白页面。为什么会这样?
解决方案
使用此功能可将文字添加到图片中(从 PHP for Kids )
<?php
//设置内容类型
头('Content-type:image / jpeg');
//从现有文件创建图像
$ jpg_image = imagecreatefromjpeg('sunset.jpg');
//为文本分配颜色
$ white = imagecolorallocate($ jpg_image,255,255,255);
//将路径设置为字体文件
$ font_path ='font.TTF';
//将文本设置为打印图像
$ text =这是日落!;
//在文本上打印文本
imagettftext($ jpg_image,25,0,75,300,$ white,$ font_path,$ text);
//发送图片到浏览器
imagejpeg($ jpg_image);
//清除内存
imagedestroy($ jpg_image);
?>
I have image creation code in image_creator.
<?php
header("Content-Type: image/jpeg");
$im = ImageCreateFromGif("photo.gif");
$black = ImageColorAllocate($im, 255, 255, 255);
$start_x = 10;
$start_y = 20;
Imagettftext($im, 12, 0, $start_x, $start_y, $black, 'verdana.ttf', "text to write");
Imagejpeg($im, '', 100);
ImageDestroy($im);
?>
The file for image output is image.php and has below code
<html>
<head>
</head>
<body>
<img src="http://localhost/image_creator.php"/>
</body>
</html>
When I run image.php, I just get a blank page. Why is it so?
解决方案
Use this to add text to image (copied from PHP for Kids)
<?php
//Set the Content Type
header('Content-type: image/jpeg');
// Create Image From Existing File
$jpg_image = imagecreatefromjpeg('sunset.jpg');
// Allocate A Color For The Text
$white = imagecolorallocate($jpg_image, 255, 255, 255);
// Set Path to Font File
$font_path = 'font.TTF';
// Set Text to Be Printed On Image
$text = "This is a sunset!";
// Print Text On Image
imagettftext($jpg_image, 25, 0, 75, 300, $white, $font_path, $text);
// Send Image to Browser
imagejpeg($jpg_image);
// Clear Memory
imagedestroy($jpg_image);
?>
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