PHPThumb image processing example code_PHP tutorial-PHP Tutorial-php.cn

PHPThumb image processing example code_PHP tutorial

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Release： 2016-07-13 10:30:50

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Download address (github.com/masterexploder/PHPThumb).
Note that this class library has the same name called phpThumb, the only difference is in upper and lower case, so be careful when searching for documentation.
In the process of website construction, there are countless places where images need to be processed. It is very cumbersome to use PHP image functions to process images.

And it is very difficult for novices to master. Now we can use the PHPThumb class library to process images, including image resizing, image interception, image watermarking, image rotation and other functions.

Example:

<?<span php
</span><span //</span><span 加载类库文件</span>
<span require_once</span> 'path/to/ThumbLib.inc.php'<span ;
</span><span //</span><span 实例化类库，传入你要处理的图片的地址可以是网络地址，也可以是本地地址</span>
<span $thumb</span> = PhpThumbFactory::create('http://www.jbxue.com/'<span );
</span><span //</span><span 把图片等比缩小到最大宽度 100px或者最高100px，当只输入一个参数的时候，是限制最宽的尺寸。</span>
<span $thumb</span>->resize(100, 100<span );
</span><span //</span><span 把图片等比缩小到原来的百分数，比如50就是原来的50%。</span>
<span $thumb</span>->resizePercent(50<span );
</span><span //</span><span 截取一个175px * 175px的图片，注意这个是截取，超出的部分直接裁切掉，不是强制改变尺寸。</span>
<span $thumb</span>->adaptiveResize(175, 175<span );
</span><span //</span><span 从图片的中心计算，截取200px * 100px的图片。</span>
<span $thumb</span>->cropFromCenter(200, 100<span );
</span><span //</span><span 截图，前两个参数分别是需要解出的图片的右上角的坐标X,Y。 后面两个参数是需要解出的图片宽，高。</span>
<span $thumb</span>->crop(100, 100, 300, 200<span );
</span><span //</span><span 把图片顺时针反转180度</span>
<span $thumb</span>->rotateImageNDegrees(180<span );
</span><span //</span><span 保存（生成）图片,你可以保存其他格式，详细参考文档</span>
<span $thumb</span>->save( 'NewPath/Of/image.jpg ' );

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Another powerful PHP image thumbnail class: phpThumb
In addition to scaling images, this class can also convert images into different formats for output (such as outputting GIF format images into PNG format). Its special functions It also includes colors, special effects, etc.
Official website: http://phpthumb.sourceforge.net/
Generally, you only need the following files:

<span We'll be using phpThumb , the open source PHP script to generate thumbnails on the fly.
Download and extract phpThumb to somewhere in your website folder. Now to use a rounded corner thumbnail of an image, simply use the img tag of HTML with src as
</span><span <</span><span img </span><span src</span><span =&rdquo;phpThumb.php?src=test.jpg&w=200&h=150&fltr[]=ric|20|20&f=png&rdquo; </span><span /></span><span  
Adjust the path to phpThumb according to where you place the phpThumb files.
</span><span <</span><span html</span><span ></span> 
<span <</span><span head</span><span ></span>
<span </</span><span head</span><span ></span> 
<span <</span><span body</span><span ></span> 
<span <</span><span img </span><span src</span><span ="phpThumb/phpThumb.php?src=../images/test.jpg&w=400&fltr[]=fram|3|2|CC9966|333333|CCCCCC"</span><span  alt</span><span =""</span><span ></span> 
<span </</span><span body</span><span ></span> 
<span </</span><span html</span><span ></span>

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src: The address of the target image
w: The width of the output image
h: The height of the output image (if not specified, it will be scaled according to the w parameter)
q: If the output is in JPG format Yes, you can specify its output quality
bg: background during output (if needed)
sw, sh, sx, sy: local output, width, height, starting position
f: output format, you can For jpeg, png, gif, ico
sfn: output a certain frame in the gif animation
fltr[]: filter, which can have many effects, including sharpening, blurring, rotation, watermark, border, mask Photo, color adjustment, etc.
Original address: http://www.jbxue.com/article/php/20250.html