how-to-output-image-to-browser.md

How to output image to browser

<?php

$im = imagecreatetruecolor(400, 300);

$c_black = imageColorAllocate($im, 0,0,0);
$c_green = imageColorAllocate($im, 46,204,64);

imageellipse($im, 200, 150, 100, 100, $c_green);

ob_start();
imagejpeg($im, null, 95);
$data = ob_get_clean();

echo '<img src="data:image/jpeg;base64,' . base64_encode( $data ) . '" />';

• imagecreatetruecolor - creates true color lib:GD image object with specified width & height
• imageColorAllocate - creates color object to later use in image
• imageellipse - creates ellipse with specified coordinates, radius and border color
• ob_start() - start buffering output (instead of outputting)
• imagejpeg - saves image as JPEG (returns data if second argument is null, as in our case)
• ob_get_clean() - returns buffered content (image data in our case)
• data:image/jpeg;base64, - allows us to use image data string in src attribute instead of path to file