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Peter Williamson Willshaw

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View GitHub Profile
View hostReachable.js
function hostReachable() {
// Handle IE and more capable browsers
var xhr = new ( window.ActiveXObject || XMLHttpRequest )( "Microsoft.XMLHTTP" );
var status;
// Open new request as a HEAD to the root hostname with a random param to bust the cache
xhr.open( "HEAD", "//" + window.location.hostname + "/?rand=" + Math.floor((1 + Math.random()) * 0x10000), false );
// Issue request and handle response
@madrobby
madrobby / gist:4161897
Created Nov 28, 2012
Retina screen media query
View gist:4161897
@media (min--moz-device-pixel-ratio: 1.5),
(-o-min-device-pixel-ratio: 3/2),
(-webkit-min-device-pixel-ratio: 1.5),
(min-device-pixel-ratio: 1.5),
(min-resolution: 144dpi),
(min-resolution: 1.5dppx) {
/* Retina rules! */
}
@xjamundx
xjamundx / canvas-upload.php
Created Feb 26, 2011
php canvas base64 png decoder
View canvas-upload.php
<?php
// requires php5
define('UPLOAD_DIR', 'images/');
$img = $_POST['img'];
$img = str_replace('data:image/png;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$data = base64_decode($img);
$file = UPLOAD_DIR . uniqid() . '.png';
$success = file_put_contents($file, $data);
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