PHP图像图形处理入门教程(1/3)
PHP图像图形处理入门教程 这款php图片生成教程是一款从生成一个简单的图像到生成复杂的图形的php教程,人简单就复杂有12个生成图像实例。 1 生成一个简单图像。
php教程图像图形处理入门教程
这款php图片生成教程是一款从生成一个简单的图像到生成复杂的图形的php教程,人简单就复杂有12个生成图像实例。
1 生成一个简单图像。
2 设定图像的颜色。
3 在图像上绘制直线。
4 在图像上显示文字。
5 在图像中显示中文字符。
6 打开已存在的图片。
7 获取图片的相关属性。
8 函数getimagesize()的用法。
9 为上传图片添加水印效果。
10 生成已有图片的缩略图。
11 使用函数imagecopyresampled()。
12 生成带有底纹的数字验证码图片的php程序。
*/
//1 生成一个简单图像。
$width = 200;
$height =200;$img = imagecreatetruecolor($width,$height) or die("不支持gd图像处理");
imagepng($img);
imagedestroy($img);
//2 设定图像的颜色。
$width = 200;
$height =200;$img = imagecreatetruecolor($width,$height) or die("不支持gd图像处理");
$bg_color = imagecolorallocate($img, 255, 0, 0);
imagefill($img, 0, 0, $bg_color);imagepng($img);
imagedestroy($img);
//3 在图像上绘制直线。
$width = 200;
$height =300;$img = imagecreatetruecolor($width,$height) or die("不支持gd图像处理");
$line_color = imagecolorallocate($img, 255, 255, 255);
imageline($img,0,40,200,40,$line_color);
imageline($img,0,260,200,260,$line_color);imagepng($img);
imagedestroy($img);
//4 在图像上显示文字。
$width = 200;
$height =300;$img = imagecreatetruecolor($width,$height) or die("不支持gd图像处理");
$line_color = imagecolorallocate($img, 255, 255, 255);imageline($img, 0, 40, 200, 40, $line_color);
imageline($img, 0, 260, 200, 260, $line_color);
imagestring($img, 5, 0, 60, "it's time to learn php!", $line_color);imagepng($img);
imagedestroy($img);
//5 在图像中显示中文字符。
$width = 200;
$height =300;$img = imagecreatetruecolor($width,$height) or die("不支持gd图像处理");
$line_color = imagecolorallocate($img, 255, 255, 255);
$font_type ="c://windows//fonts//simli.ttf"; //获取truetype字体,采用隶书字体//“西游记”3个字16进制字符
$cn_char1 = chr(0xe8).chr(0xa5).chr(0xbf);
$cn_char2 = chr(0xe6).chr(0xb8).chr(0xb8);
$cn_char3 = chr(0xe8).chr(0xae).chr(0xb0);//“吴承恩著”4个字16进制字符
$cn_str = chr(0xe5).chr(0x90).chr(0xb4).chr(0xe6).chr(0x89).chr(0xbf).chr(0xe6).chr(0x81).chr(0xa9);
$cn_str .= " ".chr(0xe8).chr(0x91).chr(0x97);imageline($img, 0, 40, 200, 40, $line_color);
imageline($img, 0, 260, 200, 260, $line_color);//竖排显示“西游记”3字
imagettftext($img, 30, 0, 10, 80, $line_color, $font_type,$cn_char1);
imagettftext($img, 30, 0, 10, 120, $line_color, $font_type,$cn_char2);
imagettftext($img, 30, 0, 10, 160, $line_color, $font_type,$cn_char3);//横排显示“吴承恩著”4字
imagettftext($img, 15, 0, 90, 254, $line_color, $font_type,$cn_str);imagepng($img);
imagedestroy($img);//6 打开已存在的图片。
$img=imagecreatefromjpeg("tower.jpg");imagejpeg($img);
imagedestroy($img);//7 获取图片的相关属性。
$img=imagecreatefromjpeg("tower.jpg");$x = imagesx($img);
$y = imagesy($img);
echo "图片tower.jpg的宽为:$x pixels";
echo "
";
echo "
";
echo "图片tower.jpg的高为:$y pixels";//8 函数getimagesize()的用法。
$img_info=getimagesize("tower.jpg");for($i=0; $i {
echo $img_info[$i];
echo "
";
}
?>
1 2 3

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

To work on file upload we are going to use the form helper. Here, is an example for file upload.

In this chapter, we are going to learn the following topics related to routing ?

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Validator can be created by adding the following two lines in the controller.
