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    • Php header image...

    We often need to read an image file content and process it, then display this image in browsers. How to show them using php? In this tutorial, we will introduce you how to do.

    Preliminary

    To make php can output images in browser, you should using send image type headers.

    Headers of image are below:

    ImageMime Type
    PNGimage/png
    GIFimage/gif
    JPEGimage/jpeg
    JPGimage/jpeg
    WebPimage/webp
    ICOimage/x-icon

    How to show images in browser using php?

    We will display a webp file as an example:

    <?php $img = '1.webp' header('Content-Type: image/webp'); echo file_get_contents($img); ?>

    Moreover, if you plan to the browser can cache images, you can do like this:

    $t=24; // hours $time=time(); $interval=3600*$t; // if cached, do not read image data if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])){ $modified_time = @$_SERVER['HTTP_IF_MODIFIED_SINCE']; if( strtotime($modified_time)+$interval > time() ){ header("HTTP/1.1 304"); exit; } } $img = '1.webp' header('Cache-Control: public'); header('Last-Modified: '.gmdate('r',$time)); header('Expires: '.

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