PHP using Imagick to generate PNG thumbnails _php tutorials

Thumbnail image if it is a picture we directly use the PHP GD library can be implemented, this article is to introduce the Imagick PDF png thumbnail method, here we have to use a plug-in, let me show you an example.

Php_imagick what?

A php extension that can be used by PHP to invoke the ImageMagick feature. Using this extension allows PHP to have the same functionality as ImageMagick.
ImageMagick is a powerful, stable and free toolset and development package that can be used to read, write, and process image files in more than 185 basic formats, including popular TIFF, JPEG, GIF, PNG, PDF, and PHOTOCD formats. With ImageMagick, you can dynamically generate images based on the needs of your Web application, and you can resize, rotate, sharpen, subtract, or add effects to a (or a group of) images and save the results of the operation in the same format or other format.

Php_imagick How to use

. Create a thumbnail and show it

The code is as follows	Copy Code
Header (' Content-type:image/jpeg '); $image = new Imagick (' image.jpg '); If 0 is provided as a width or height parameter,//aspect ratio is maintained $image->thumbnailimage (100, 0); Echo $image; ?>

Animated image of a thumbnail gif

The code is as follows	Copy Code
/* Create A new Imagick object and read in GIF */ $im = new Imagick ("Example.gif"); /* Resize All frames */ foreach ($im as $frame) { /* 50x50 Frames */ $frame->thumbnailimage (50, 50); /* Set the virtual canvas to correct size */ $frame->setimagepage (50, 50, 0, 0); }/* Notice writeimages instead of writeimage * * $im->writeimages ("Example_small.gif", true); ?>

Well, it's far away, let's get to the chase.

PDF Generate PNG home thumbnail (server needs to support Imagick)

The code is as follows

Copy Code

/** * Pdf2png * @param $pdf pending PDF file * @param $path The path of the picture to be saved * @param $page the page to be exported-1 for all 0 for the first page 1 for the second page * @return saved picture path and file name. */ function Pdf2png ($pdf, $path, $page =0) { if (!is_dir ($path)) { mkdir ($path, true); } if (!extension_loaded (' Imagick ')) { Echo ' Didn't find imagick! ' ; return false; } if (!file_exists ($pdf)) { Echo ' did not find pdf '; return false; } $im = new Imagick (); $im->setresolution (120,120); Set the image resolution $im->setcompressionquality (80); Compression ratio $im->readimage ($pdf. " [". $page."] "); Set the first page of the read pdf $im->thumbnailimage (max., true); Change the size of the image $im->scaleimage (200,100,true); Scaled small image $filename = $path. " /". Time (). '. PNG '; if ($im->writeimage ($filename) = = True) { $Return = $filename; } return $Return; } $s =pdf2png (' file/1371273225-ceshi_ppt.pdf ', ' images '); echo "";

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