image.php File Reference

Namespaces
namespace	core

Functions
	doConditionalGet ($etag, $lastModified)
	imageCreateCorners ($sourceImage, $radii)
	findSharp ($orig, $final)
	exit404BadReq ()
	imageFilenameCheck ($imageUrl)

Variables
const	MEMORY_TO_ALLOCATE '100M'
const	DEFAULT_IMAGE_QUALITY 90
const	DEFAULT_BACKGROUND_COLOR '000000'
const	ONLY_LOCAL_IMAGES true
const	ENABLE_IMAGEFILTER true
const	ENABLE_ROUNDCORNER true
const	ENABLE_IMAGEROTATE true
if(function_exists( 'set_magic_quotes_runtime')) if(function_exists('mb_http_output'))	$xoopsOption ['nocommon'] = true
	$xoopsLogger = XoopsLogger::getInstance()
	$imageId = isset($_GET['id']) ? (int)$_GET['id'] : false
	$imageUrl = isset($_GET['url']) ? (string)$_GET['url'] : (isset($_GET['src']) ? (string)$_GET['src'] : false)
if(!empty( $imageId)) elseif(!empty($imageUrl))	else
	$edited_image_filename = 'editedimage_' . md5($_SERVER['REQUEST_URI']) . '_' . $imageFilename
	$cached_image = XoopsCache::read($edited_image_filename)
if(!isset($_GET['nocache']) &&!isset($_GET['noservercache']) &&!empty($cached_image) &&($cached_image['cached_time'] >=$imageCreatedTime))	$max_width = isset($_GET['width']) ? (int)$_GET['width'] : false
	$max_height = isset($_GET['height']) ? (int)$_GET['height'] : false
if(! $max_width && $max_height) elseif( $max_width &&! $max_height) elseif(! $max_width &&! $max_height)	$color = isset($_GET['color']) ? preg_replace('/[^0-9a-fA-F]/', '', (string)$_GET['color']) : false
	$filter = isset($_GET['filter']) ? $_GET['filter'] : false
	$radius = isset($_GET['radius']) ? (string)$_GET['radius'] : false
	$angle = isset($_GET['angle']) ? (float)$_GET['angle'] : false
if(empty($_GET['width']) &&empty($_GET['height']) &&empty($_GET['color']) &&empty($_GET['filter']) &&empty($_GET['radius']) &&empty($_GET['angle']))	$offset_x = 0
	$offset_y = 0
if(isset($_GET['cropratio']))	$xRatio = $max_width / $imageWidth
	$yRatio = $max_height / $imageHeight
	$tn_height = $max_height
	$quality = isset($_GET['quality']) ? (int)$_GET['quality'] : DEFAULT_IMAGE_QUALITY
	$destination_image = imagecreatetruecolor($tn_width, $tn_height)
	$transparent = imagecolorallocatealpha($destination_image, 255, 255, 255, 127)
	$imageData = ob_get_contents()
	$imageCreatedTime = time()
	$cached_image ['edited_image_filename'] = $edited_image_filename
	$cached_image ['image_data'] = $imageData
	$cached_image ['cached_time'] = $imageCreatedTime
	$last_modified_string = gmdate('D, d M Y H:i:s', $imageCreatedTime) . ' GMT'
	$etag = md5($imageData)

Function Documentation

doConditionalGet()

doConditionalGet	(		$etag,
			$lastModified
	)

Parameters

$etag
$lastModified

Returns

null

exit404BadReq()

exit404BadReq

(

)

issue an error for bad request

Many different issues end up here, so message is generic 404. This keeps us from leaking info by probing

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findSharp()

findSharp	(		$orig,
			$final
	)

Parameters

$orig
$final

Returns

mixed

imageCreateCorners()

imageCreateCorners	(		$sourceImage,
			$radii
	)

ref: http://www.tricksofit.com/2014/08/round-corners-on-image-using-php-and-gd-library

Parameters

resource	$sourceImage	GD Image resource
int[]	$radii	array(top left, top right, bottom left, bottom right) of pixel radius for each corner. A 0 disables rounding on a corner.

Returns

resource|\GdImage

imageFilenameCheck()

imageFilenameCheck

(

$imageUrl

)

check local image url for possible issues

Parameters

string

$imageUrl

url to local image starting at site root with a '/'

Returns

bool true if name is acceptable, exit if not

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Variable Documentation

$angle

$angle = isset($_GET['angle']) ? (float)$_GET['angle'] : false

$cached_image [1/4]

$cached_image = XoopsCache::read($edited_image_filename)

$cached_image [2/4]

$cached_image[ 'cached_time'] = $imageCreatedTime

$cached_image [3/4]

$cached_image[ 'edited_image_filename'] = $edited_image_filename

$cached_image [4/4]

$cached_image[ 'image_data'] = $imageData

$color

if(! $max_width &&$max_height) elseif($max_width &&! $max_height) elseif (! $max_width &&! $max_height) $color = isset($_GET['color']) ? preg_replace('/[^0-9a-fA-F]/', '', (string)$_GET['color']) : false

$destination_image

$destination_image = imagecreatetruecolor($tn_width, $tn_height)

$edited_image_filename

$edited_image_filename = 'editedimage_' . md5($_SERVER['REQUEST_URI']) . '_' . $imageFilename

$etag

$etag = md5($imageData)

$filter

$filter = isset($_GET['filter']) ? $_GET['filter'] : false

$imageCreatedTime

$imageCreatedTime = time()

$imageData

$imageData = ob_get_contents()

$imageId

$imageId = isset($_GET['id']) ? (int)$_GET['id'] : false

$imageUrl

$imageUrl = isset($_GET['url']) ? (string)$_GET['url'] : (isset($_GET['src']) ? (string)$_GET['src'] : false)

$last_modified_string

$last_modified_string = gmdate('D, d M Y H:i:s', $imageCreatedTime) . ' GMT'

$max_height

$max_height = isset($_GET['height']) ? (int)$_GET['height'] : false

$max_width

if (!isset( $_GET[ 'nocache']) &&!isset( $_GET[ 'noservercache']) &&!empty( $cached_image) &&( $cached_image[ 'cached_time'] >=$imageCreatedTime)) $max_width = isset($_GET['width']) ? (int)$_GET['width'] : false

$offset_x

if (empty( $_GET[ 'width']) &&empty( $_GET[ 'height']) &&empty( $_GET[ 'color']) &&empty( $_GET[ 'filter']) &&empty( $_GET[ 'radius']) &&empty( $_GET[ 'angle'])) $offset_x = 0

$offset_y

$offset_y = 0

$quality

$quality = isset($_GET['quality']) ? (int)$_GET['quality'] : DEFAULT_IMAGE_QUALITY

$radius

$radius = isset($_GET['radius']) ? (string)$_GET['radius'] : false

$tn_height

$tn_height = $max_height

$transparent

$transparent = imagecolorallocatealpha($destination_image, 255, 255, 255, 127)

$xoopsLogger

$xoopsLogger = XoopsLogger::getInstance()

$xoopsOption

if(function_exists('set_magic_quotes_runtime')) if (function_exists( 'mb_http_output')) $xoopsOption[ 'nocommon'] = true

$xRatio

if (isset( $_GET[ 'cropratio'])) $xRatio = $max_width / $imageWidth

$yRatio

$yRatio = $max_height / $imageHeight

DEFAULT_BACKGROUND_COLOR

const DEFAULT_BACKGROUND_COLOR '000000'

DEFAULT_IMAGE_QUALITY

const DEFAULT_IMAGE_QUALITY 90

else

if (!isset( $_GET[ 'nocache']) &&!isset( $_GET[ 'nobrowsercache'])) else

Initial value:

{
    
    header('Content-type: image/gif')

ENABLE_IMAGEFILTER

const ENABLE_IMAGEFILTER true

ENABLE_IMAGEROTATE

const ENABLE_IMAGEROTATE true

ENABLE_ROUNDCORNER

const ENABLE_ROUNDCORNER true

MEMORY_TO_ALLOCATE

const MEMORY_TO_ALLOCATE '100M'

ONLY_LOCAL_IMAGES

const ONLY_LOCAL_IMAGES true