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img.php1 lines ASCII Unix (LF) <?php
/**
* Resize images on the fly using CImage, configuration is made in file named.
*
*/
/**
* Default configuration options, can be overridden in own config-file.
*
* @param string $msg to display.
*
* @return void
*/
function errorPage($msg)
{
header("Status: 404 Not Found");
die('img.php say 404: ' . $msg);
}
/**
* Custom exception handler.
*/
set_exception_handler(function($exception) {
errorPage("<p><b>img.php: Uncaught exception:</b> <p>" . $exception->getMessage() . "</p><pre>" . $exception->getTraceAsString(), "</pre>");
});
/**
* Get input from query string or return default value if not set.
*
* @param mixed $key as string or array of string values to look for in $_GET.
* @param mixed $default value to return when $key is not set in $_GET.
*
* @return mixed value from $_GET or default value.
*/
function get($key, $default = null)
{
if (is_array($key)) {
foreach ($key as $val) {
if (isset($_GET[$val])) {
return $_GET[$val];
}
}
} elseif (isset($_GET[$key])) {
return $_GET[$key];
}
return $default;
}
/**
* Get input from query string and set to $defined if defined or else $undefined.
*
* @param mixed $key as string or array of string values to look for in $_GET.
* @param mixed $defined value to return when $key is set in $_GET.
* @param mixed $undefined value to return when $key is not set in $_GET.
*
* @return mixed value as $defined or $undefined.
*/
function getDefined($key, $defined, $undefined)
{
return get($key) === null ? $undefined : $defined;
}
/**
* Log when verbose mode, when used without argument it returns the result.
*
* @param string $msg to log.
*
* @return void or array.
*/
function verbose($msg = null)
{
global $verbose;
static $log = array();
if (!$verbose) {
return;
}
if (is_null($msg)) {
return $log;
}
$log[] = $msg;
}
/**
* Get configuration options from file.
*/
$configFile = __DIR__.'/'.basename(__FILE__, '.php').'_config.php';
$config = require $configFile;
call_user_func($config['error_reporting']);
/**
* Set default timezone if not set or if its set in the config-file.
*/
if (isset($config['default_timezone'])) {
date_default_timezone_set($config['default_timezone']);
} else if (!ini_get('default_timezone')) {
date_default_timezone_set('UTC');
}
/**
* verbose, v - do a verbose dump of what happens
*/
$verbose = getDefined(array('verbose', 'v'), true, false);
/**
* src - the source image file.
*/
$srcImage = get('src')
or errorPage('Must set src-attribute.');
preg_match('#^[a-z0-9A-Z-/_\.]+$#', $srcImage)
or errorPage('Filename contains invalid characters.');
verbose("src = $srcImage");
/**
* width, w - set target width, affecting the resulting image width, height and resize options
*/
$newWidth = get(array('width', 'w'));
// Check to replace predefined size
$sizes = call_user_func($config['size_constant']);
if (isset($sizes[$newWidth])) {
$newWidth = $sizes[$newWidth];
}
// Support width as % of original width
if ($newWidth[strlen($newWidth)-1] == '%') {
is_numeric(substr($newWidth, 0, -1))
or errorPage('Width % not numeric.');
} else {
is_null($newWidth)
or ($newWidth > 10 && $newWidth <= $config['max_width'])
or errorPage('Width out of range.');
}
verbose("new width = $newWidth");
/**
* height, h - set target height, affecting the resulting image width, height and resize options
*/
$newHeight = get(array('height', 'h'));
// Check to replace predefined size
if (isset($sizes[$newHeight])) {
$newHeight = $sizes[$newHeight];
}
// height
if ($newHeight[strlen($newHeight)-1] == '%') {
is_numeric(substr($newHeight, 0, -1))
or errorPage('Height % out of range.');
} else {
is_null($newHeight)
or ($newHeight > 10 && $newHeight <= $config['max_height'])
or errorPage('Hight out of range.');
}
verbose("new height = $newHeight");
/**
* aspect-ratio, ar - affecting the resulting image width, height and resize options
*/
$aspectRatio = get(array('aspect-ratio', 'ar'));
// Check to replace predefined aspect ratio
$aspectRatios = call_user_func($config['aspect_ratio_constant']);
$negateAspectRatio = ($aspectRatio[0] == '!') ? true : false;
$aspectRatio = $negateAspectRatio ? substr($aspectRatio, 1) : $aspectRatio;
if (isset($aspectRatios[$aspectRatio])) {
$aspectRatio = $aspectRatios[$aspectRatio];
}
if ($negateAspectRatio) {
$aspectRatio = 1 / $aspectRatio;
}
is_null($aspectRatio)
or is_numeric($aspectRatio)
or errorPage('Aspect ratio out of range');
verbose("aspect ratio = $aspectRatio");
/**
* crop-to-fit, cf - affecting the resulting image width, height and resize options
*/
$cropToFit = getDefined(array('crop-to-fit', 'cf'), true, false);
verbose("crop to fit = $cropToFit");
/**
* no-ratio, nr, stretch - affecting the resulting image width, height and resize options
*/
$keepRatio = getDefined(array('no-ratio', 'nr', 'stretch'), false, true);
verbose("keep ratio = $keepRatio");
/**
* crop, c - affecting the resulting image width, height and resize options
*/
$crop = get(array('crop', 'c'));
verbose("crop = $crop");
/**
* area, a - affecting the resulting image width, height and resize options
*/
$area = get(array('area', 'a'));
verbose("area = $area");
/**
* skip-original, so - skip the original image and always process a new image
*/
$useOriginal = getDefined(array('save-as', 'sa'), false, true);
verbose("use original = $useOriginal");
/**
* no-cache, nc - skip the cached version and process and create a new version in cache.
*/
$useCache = getDefined(array('no-cache', 'nc'), false, true);
verbose("use cache = $useCache");
/**
* quality, q - set level of quality for jpeg images
*/
$quality = get(array('quality', 'q'));
is_null($quality)
or ($quality > 0 and $quality <= 100)
or errorPage('Quality out of range');
verbose("quality = $quality");
/**
* compress, co - what strategy to use when compressing png images
*/
$compress = get(array('compress', 'co'));
is_null($compress)
or ($compress > 0 and $compress <= 9)
or errorPage('Compress out of range');
verbose("compress = $compress");
/**
* save-as, sa - what type of image to save
*/
$saveAs = get(array('save-as', 'sa'));
verbose("save as = $saveAs");
/**
* scale, s - Processing option, scale up or down the image prior actual resize
*/
$scale = get(array('scale', 's'));
is_null($scale)
or ($scale >= 0 and $quality <= 400)
or errorPage('Scale out of range');
verbose("scale = $scale");
/**
* palette, p - Processing option, create a palette version of the image
*/
$palette = getDefined(array('palette', 'p'), true, false);
verbose("palette = $palette");
/**
* sharpen - Processing option, post filter for sharpen effect
*/
$sharpen = getDefined('sharpen', true, null);
verbose("sharpen = $sharpen");
/**
* emboss - Processing option, post filter for emboss effect
*/
$emboss = getDefined('emboss', true, null);
verbose("emboss = $emboss");
/**
* blur - Processing option, post filter for blur effect
*/
$blur = getDefined('blur', true, null);
verbose("blur = $blur");
/**
* filter, f, f0-f9 - Processing option, post filter for various effects using imagefilter()
*/
$filters = array();
$filter = get(array('filter', 'f'));
if ($filter) {
$filters[] = $filter;
}
for ($i = 0; $i < 10; $i++) {
$filter = get(array("filter{$i}", "f{$i}"));
if ($filter) {
$filters[] = $filter;
}
}
verbose("filters = " . print_r($filters, 1));
/**
* Display image if verbose mode
*/
if ($verbose) {
$query = array();
parse_str($_SERVER['QUERY_STRING'], $query);
unset($query['verbose']);
unset($query['v']);
unset($query['nocache']);
unset($query['nc']);
$url1 = '?' . http_build_query($query);
$log = htmlentities(print_r(verbose(), 1));
echo <<<EOD
<a href=$url1><code>$url1</code></a><br>
<img src='{$url1}' />
<pre>$log</pre>
EOD;
}
/**
* Create and output the image
*/
require $config['cimage_class'];
$img = new CImage();
$img->setVerbose($verbose)
->setSource($srcImage, $config['image_path'])
->setOptions(
array(
// Options for calculate dimensions
'newWidth' => $newWidth,
'newHeight' => $newHeight,
'aspectRatio' => $aspectRatio,
'keepRatio' => $keepRatio,
'cropToFit' => $cropToFit,
'crop' => $crop,
'area' => $area,
// Pre-processing, before resizing is done
'scale' => $scale,
// Post-processing, after resizing is done
'palette' => $palette,
'filters' => $filters,
'sharpen' => $sharpen,
'emboss' => $emboss,
'blur' => $blur,
)
)
->initDimensions()
->calculateNewWidthAndHeight()
->setSaveAsExtension($saveAs)
->setJpegQuality($quality)
->setPngCompression($compress)
->useOriginalIfPossible($useOriginal)
->generateFilename($config['cache_path'])
->useCacheIfPossible($useCache)
->load()
->preResize()
->resize()
->postResize()
->setPostProcessingOptions($config['postprocessing'])
->save()
->output();