<?php
/*
Simple PHP Image Resizer
Copyright (c) 2012 Ryan Fait
www.ryanfait.com
INSTRUCTIONS:
Specify just the width: <img src="/dir/resize.php?w=100&img=/test.jpg" />
Specify just the height: <img src="/dir/resize.php?h=200&img=/test.jpg" />
Specify the width and height: <img src="/dir/resize.php?w=100&h=200&img=/test.jpg" />
IMPORTANT:
I recommend using a full image path (i.e. img=/browser/path/to/image.jpg), but other options may work
for you. Using a full path will best ensure image caching. Please drop me a line if you do any testing
with that (lines 38-42).
?img=/dir/images/test.jpg
?img=relative-dir/test.jpg
?img=test.jpg
This script is free. If you want to redistribute this script, you must leave the copyright
notice and my website URL with the function.
*/
session_start();
header("Pragma: public");
header("Cache-Control: max-age = 604800");
header("Expires: ".gmdate("D, d M Y H:i:s", time() + 604800)." GMT");
function thumbnail($image, $width, $height) {
if($image[0] != "/") { // Decide where to look for the image if a full path is not given
if(!isset($_SERVER["HTTP_REFERER"])) { // Try to find image if accessed directly from this script in a browser
$image = $_SERVER["DOCUMENT_ROOT"].implode("/", (explode('/', $_SERVER["PHP_SELF"], -1)))."/".$image;
} else {
$image = implode("/", (explode('/', $_SERVER["HTTP_REFERER"], -1)))."/".$image;
}
} else {
$image = $_SERVER["DOCUMENT_ROOT"].$image;
}
$image_properties = getimagesize($image);
$image_width = $image_properties[0];
$image_height = $image_properties[1];
$image_ratio = $image_width / $image_height;
$type = $image_properties["mime"];
if(!$width && !$height) {
$width = $image_width;
$height = $image_height;
}
if(!$width) {
$width = round($height * $image_ratio);
}
if(!$height) {
$height = round($width / $image_ratio);
}
if($type == "image/jpeg") {
header('Content-type: image/jpeg');
$thumb = imagecreatefromjpeg($image);
} elseif($type == "image/png") {
header('Content-type: image/png');
$thumb = imagecreatefrompng($image);
} else {
return false;
}
$temp_image = imagecreatetruecolor($width, $height);
imagecopyresampled($temp_image, $thumb, 0, 0, 0, 0, $width, $height, $image_width, $image_height);
$thumbnail = imagecreatetruecolor($width, $height);
imagecopyresampled($thumbnail, $temp_image, 0, 0, 0, 0, $width, $height, $width, $height);
if($type == "image/jpeg") {
imagejpeg($thumbnail);
} else {
imagepng($thumbnail);
}
imagedestroy($temp_image);
imagedestroy($thumbnail);
}
if(isset($_GET["h"])) { $h = $_GET["h"]; } else { $h = 0; }
if(isset($_GET["w"])) { $w = $_GET["w"]; } else { $w = 0; }
thumbnail($_GET["img"], $w, $h);
?>Obecnie używam do tego pliku php, czy jest możliwe (napewno jest ;P) zastąpić to kodem js?
Plik html:
<?php
for($i=1;$i<15;$i++)
{
$a=rand(1,78);
echo(<<<HTML
<a href="/img/{$a}.png">
<img id="lol{$i}" src="/img.php?w=250&h=250&img=/img/{$a}.png" width="250" height="250" srcset="/img.php?w=250&h=250&img=/img/{$a}.png 250w, /img.php?w=500&h=500&img=/img/{$a}.png 500w" sizes="(max-width: 250px) 100vw, 250px" alt="Błąd - brak zdjęcia" />
</a>
HTML
);
}
?>
