How to Output Images to the Browser Using PHP?

Outputting Images in PHP

When working with images in PHP, you may encounter situations where you need to display them on a web page. In this scenario, understanding how to output images to the browser is crucial.

Consider the following code snippet:

<p>I have an image $file ( eg ../image.jpg )</p>

<p>which has a mime type $type</p>

<p>How can I output it to the browser?</p>

To display the image effectively, we need to provide the browser with essential information. Here's how it's done:

<?php
$file = '../image.jpg';
$type = 'image/jpeg';
header('Content-Type:'.$type);
header('Content-Length: ' . filesize($file));
readfile($file);
?>

Breaking down the code:

1. header('Content-Type:'.$type);: Informs the browser of the MIME type of the image. For JPEG images, it would be 'image/jpeg'.
2. header('Content-Length: ' . filesize($file));: Specifies the size of the image in bytes, helping the browser handle buffering and display.
3. readfile($file);: Reads the image file and outputs its contents to the browser.

By executing this code, the PHP script will correctly display the image in the browser. Note that the provided file path ($file) and MIME type ($type) should be adjusted accordingly based on your specific image and its location.

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