استفسار بخصوص هذا الكود هو عبارة عن ملف يعرض الصور بعد تصغيرها
الا انه احينا عندما اقوم بعرض االصفحة من خلال هذا الكود تظهر الصور واحينا لا فأطر الى تحديث الصفحة احينا احدث الصفحة تلات مراة حتى تظهر الصور
هذا هو كود العرض
<img src="/show-img.php?filename=doc/file/'.$profilePhoto.'&width=80&height=70" width="80px" height="70px" border="0">
وهذا هو محتوى ملف show-img.php
<?php
/**
* show_image.php
*
* Example utility file for dynamically displaying images
*
* @author Ian Selby
* @version 1.0 (php 5 version)
*/
//file_exists
//reference thumbnail class
include_once('/classes/thumbnail.inc.php');
$thumb = new Thumbnail($_GET['filename']);
$thumb->resize($_GET['width'],$_GET['height']);
$thumb->show();
exit;
?>ملف thumbnail.inc.php
<?php
/**
* thumbnail.inc.php
*
* @author Ian Selby (ian@gen-x-design.com)
* @copyright Copyright 2006
* @version 1.1 (PHP5)
*
*/
/**
* PHP class for dynamically resizing, cropping, and rotating images for thumbnail purposes and either displaying them on-the-fly or saving them.
*
*/
class Thumbnail {
/**
* Error message to display, if any
*
* @var string
*/
private $errmsg;
/**
* Whether or not there is an error
*
* @var boolean
*/
private $error;
/**
* Format of the image file
*
* @var string
*/
private $format;
/**
* File name and path of the image file
*
* @var string
*/
private $fileName;
/**
* Image meta data if any is available (jpeg/tiff) via the exif library
*
* @var array
*/
public $imageMeta;
/**
* Current dimensions of working image
*
* @var array
*/
private $currentDimensions;
/**
* New dimensions of working image
*
* @var array
*/
private $newDimensions;
/**
* Image resource for newly manipulated image
*
* @var resource
*/
private $newImage;
/**
* Image resource for image before previous manipulation
*
* @var resource
*/
private $oldImage;
/**
* Image resource for image being currently manipulated
*
* @var resource
*/
private $workingImage;
/**
* Percentage to resize image by
*
* @var int
*/
private $percent;
/**
* Maximum width of image during resize
*
* @var int
*/
private $maxWidth;
/**
* Maximum height of image during resize
*
* @var int
*/
private $maxHeight;
/**
* Class constructor
*
* @param string $fileName
* @return Thumbnail
*/
public function __construct($fileName) {
//make sure the GD library is installed
if(!function_exists("gd_info")) {
echo 'You do not have the GD Library installed. This class requires the GD library to function properly.' . "\n";
echo 'visit http://us2.php.net/manual/en/ref.image.php for more information';
exit;
}
//initialize variables
$this->errmsg = '';
$this->error = false;
$this->currentDimensions = array();
$this->newDimensions = array();
$this->fileName = $fileName;
$this->imageMeta = array();
$this->percent = 100;
$this->maxWidth = 0;
$this->maxHeight = 0;
//check to see if file exists
if(!file_exists($this->fileName)) {
$this->errmsg = 'File not found';
$this->error = true;
}
//check to see if file is readable
elseif(!is_readable($this->fileName)) {
$this->errmsg = 'File is not readable';
$this->error = true;
}
//if there are no errors, determine the file format
if($this->error == false) {
//check if gif
if(stristr(strtolower($this->fileName),'.gif')) $this->format = 'GIF';
//check if jpg
elseif(stristr(strtolower($this->fileName),'.jpg') || stristr(strtolower($this->fileName),'.jpeg')) $this->format = 'JPG';
//check if png
elseif(stristr(strtolower($this->fileName),'.png')) $this->format = 'PNG';
//unknown file format
else {
$this->errmsg = 'Unknown file format';
$this->error = true;
}
}
//initialize resources if no errors
if($this->error == false) {
switch($this->format) {
case 'GIF':
$this->oldImage = ImageCreateFromGif($this->fileName);
break;
case 'JPG':
$this->oldImage = ImageCreateFromJpeg($this->fileName);
break;
case 'PNG':
$this->oldImage = ImageCreateFromPng($this->fileName);
break;
}
$size = GetImageSize($this->fileName);
$this->currentDimensions = array('width'=>$size[0],'height'=>$size[1]);
$this->newImage = $this->oldImage;
$this->gatherImageMeta();
}
if($this->error == true) {
$this->showErrorImage();
break;
}
}
/**
* Class destructor
*
*/
public function __destruct() {
if(is_resource($this->newImage)) @ImageDestroy($this->newImage);
if(is_resource($this->oldImage)) @ImageDestroy($this->oldImage);
if(is_resource($this->workingImage)) @ImageDestroy($this->workingImage);
}
/**
* Returns the current width of the image
*
* @return int
*/
private function getCurrentWidth() {
return $this->currentDimensions['width'];
}
/**
* Returns the current height of the image
*
* @return int
*/
private function getCurrentHeight() {
return $this->currentDimensions['height'];
}
/**
* Calculates new image width
*
* @param int $width
* @param int $height
* @return array
*/
private function calcWidth($width,$height) {
$newWp = (100 * $this->maxWidth) / $width;
$newHeight = ($height * $newWp) / 100;
return array('newWidth'=>intval($this->maxWidth),'newHeight'=>intval($newHeight));
}
/**
* Calculates new image height
*
* @param int $width
* @param int $height
* @return array
*/
private function calcHeight($width,$height) {
$newHp = (100 * $this->maxHeight) / $height;
$newWidth = ($width * $newHp) / 100;
return array('newWidth'=>intval($newWidth),'newHeight'=>intval($this->maxHeight));
}
/**
* Calculates new image size based on percentage
*
* @param int $width
* @param int $height
* @return array
*/
private function calcPercent($width,$height) {
$newWidth = ($width * $this->percent) / 100;
$newHeight = ($height * $this->percent) / 100;
return array('newWidth'=>intval($newWidth),'newHeight'=>intval($newHeight));
}
/**
* Calculates new image size based on width and height, while constraining to maxWidth and maxHeight
*
* @param int $width
* @param int $height
*/
private function calcImageSize($width,$height) {
$newSize = array('newWidth'=>$width,'newHeight'=>$height);
if($this->maxWidth > 0) {
$newSize = $this->calcWidth($width,$height);
if($this->maxHeight > 0 && $newSize['newHeight'] > $this->maxHeight) {
$newSize = $this->calcHeight($newSize['newWidth'],$newSize['newHeight']);
}
//$this->newDimensions = $newSize;
}
if($this->maxHeight > 0) {
$newSize = $this->calcHeight($width,$height);
if($this->maxWidth > 0 && $newSize['newWidth'] > $this->maxWidth) {
$newSize = $this->calcWidth($newSize['newWidth'],$newSize['newHeight']);
}
//$this->newDimensions = $newSize;
}
$this->newDimensions = $newSize;
}
/**
* Calculates new image size based percentage
*
* @param int $width
* @param int $height
*/
private function calcImageSizePercent($width,$height) {
if($this->percent > 0) {
$this->newDimensions = $this->calcPercent($width,$height);
}
}
/**
* Displays error image
*
*/
private function showErrorImage() {
header('Content-type: image/png');
$errImg = ImageCreate(220,25);
$bgColor = imagecolorallocate($errImg,0,0,0);
$fgColor1 = imagecolorallocate($errImg,255,255,255);
$fgColor2 = imagecolorallocate($errImg,255,0,0);
imagestring($errImg,3,6,6,'Error:',$fgColor2);
imagestring($errImg,3,55,6,$this->errmsg,$fgColor1);
imagepng($errImg);
imagedestroy($errImg);
}
/**
* Resizes image to maxWidth x maxHeight
*
* @param int $maxWidth
* @param int $maxHeight
*/
public function resize($maxWidth = 0, $maxHeight = 0) {
$this->maxWidth = $maxWidth;
$this->maxHeight = $maxHeight;
$this->calcImageSize($this->currentDimensions['width'],$this->currentDimensions['height']);
if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
else {
$this->workingImage = ImageCreate($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
ImageCopyResampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}
/**
* Resizes the image by $percent percent
*
* @param int $percent
*/
public function resizePercent($percent = 0) {
$this->percent = $percent;
$this->calcImageSizePercent($this->currentDimensions['width'],$this->currentDimensions['height']);
if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
else {
$this->workingImage = ImageCreate($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
ImageCopyResampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}
/**
* Crops the image from calculated center in a square of $cropSize pixels
*
* @param int $cropSize
*/
public function cropFromCenter($cropSize) {
if($cropSize > $this->currentDimensions['width']) $cropSize = $this->currentDimensions['width'];
if($cropSize > $this->currentDimensions['height']) $cropSize = $this->currentDimensions['height'];
$cropX = intval(($this->currentDimensions['width'] - $cropSize) / 2);
$cropY = intval(($this->currentDimensions['height'] - $cropSize) / 2);
if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($cropSize,$cropSize);
}
else {
$this->workingImage = ImageCreate($cropSize,$cropSize);
}
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$cropX,
$cropY,
$cropSize,
$cropSize,
$cropSize,
$cropSize
);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $cropSize;
$this->currentDimensions['height'] = $cropSize;
}
/**
* Advanced cropping function that crops an image using $startX and $startY as the upper-left hand corner.
*
* @param int $startX
* @param int $startY
* @param int $width
* @param int $height
*/
public function crop($startX,$startY,$width,$height) {
//make sure the cropped area is not greater than the size of the image
if($width > $this->currentDimensions['width']) $width = $this->currentDimensions['width'];
if($height > $this->currentDimensions['height']) $height = $this->currentDimensions['height'];
//make sure not starting outside the image
if(($startX + $width) > $this->currentDimensions['width']) $startX = ($this->currentDimensions['width'] - $width);
if(($startY + $height) > $this->currentDimensions['height']) $startY = ($this->currentDimensions['height'] - $height);
if($startX < 0) $startX = 0;
if($startY < 0) $startY = 0;
if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($width,$height);
}
else {
$this->workingImage = ImageCreate($width,$height);
}
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$startX,
$startY,
$width,
$height,
$width,
$height
);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $height;
}
/**
* Outputs the image to the screen, or saves to $name if supplied. Quality of JPEG images can be controlled with the $quality variable
*
* @param int $quality
* @param string $name
*/
public function show($quality=100,$name = '') {
switch($this->format) {
case 'GIF':
if($name != '') {
ImageGif($this->newImage,$name);
}
else {
header('Content-type: image/gif');
ImageGif($this->newImage);
}
break;
case 'JPG':
if($name != '') {
ImageJpeg($this->newImage,$name,$quality);
}
else {
header('Content-type: image/jpeg');
ImageJpeg($this->newImage,'',$quality);
}
break;
case 'PNG':
if($name != '') {
ImagePng($this->newImage,$name);
}
else {
header('Content-type: image/png');
ImagePng($this->newImage);
}
break;
}
}
/**
* Saves image as $name (can include file path), with quality of # percent if file is a jpeg
*
* @param string $name
* @param int $quality
*/
public function save($name,$quality=100) {
$this->show($quality,$name);
}
/**
* Creates Apple-style reflection under image, optionally adding a border to main image
*
* @param int $percent
* @param int $reflection
* @param int $white
* @param bool $border
* @param string $borderColor
*/
public function createReflection($percent,$reflection,$white,$border = true,$borderColor = '#a4a4a4') {
$width = $this->currentDimensions['width'];
$height = $this->currentDimensions['height'];
$reflectionHeight = intval($height * ($reflection / 100));
$newHeight = $height + $reflectionHeight;
$reflectedPart = $height * ($percent / 100);
$this->workingImage = ImageCreateTrueColor($width,$newHeight);
ImageAlphaBlending($this->workingImage,true);
$colorToPaint = ImageColorAllocateAlpha($this->workingImage,255,255,255,0);
ImageFilledRectangle($this->workingImage,0,0,$width,$newHeight,$colorToPaint);
imagecopyresampled(
$this->workingImage,
$this->newImage,
0,
0,
0,
$reflectedPart,
$width,
$reflectionHeight,
$width,
($height - $reflectedPart));
$this->imageFlipVertical();
imagecopy($this->workingImage,$this->newImage,0,0,0,0,$width,$height);
imagealphablending($this->workingImage,true);
for($i=0;$i<$reflectionHeight;$i++) {
$colorToPaint = imagecolorallocatealpha($this->workingImage,255,255,255,($i/$reflectionHeight*-1+1)*$white);
imagefilledrectangle($this->workingImage,0,$height+$i,$width,$height+$i,$colorToPaint);
}
if($border == true) {
$rgb = $this->hex2rgb($borderColor,false);
$colorToPaint = imagecolorallocate($this->workingImage,$rgb[0],$rgb[1],$rgb[2]);
imageline($this->workingImage,0,0,$width,0,$colorToPaint); //top line
imageline($this->workingImage,0,$height,$width,$height,$colorToPaint); //bottom line
imageline($this->workingImage,0,0,0,$height,$colorToPaint); //left line
imageline($this->workingImage,$width-1,0,$width-1,$height,$colorToPaint); //right line
}
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $newHeight;
}
/**
* Inverts working image, used by reflection function
*
*/
private function imageFlipVertical() {
$x_i = imagesx($this->workingImage);
$y_i = imagesy($this->workingImage);
for($x = 0; $x < $x_i; $x++) {
for($y = 0; $y < $y_i; $y++) {
imagecopy($this->workingImage,$this->workingImage,$x,$y_i - $y - 1, $x, $y, 1, 1);
}
}
}
/**
* Converts hexidecimal color value to rgb values and returns as array/string
*
* @param string $hex
* @param bool $asString
* @return array|string
*/
private function hex2rgb($hex, $asString = false) {
// strip off any leading #
if (0 === strpos($hex, '#')) {
$hex = substr($hex, 1);
} else if (0 === strpos($hex, '&H')) {
$hex = substr($hex, 2);
}
// break into hex 3-tuple
$cutpoint = ceil(strlen($hex) / 2)-1;
$rgb = explode(':', wordwrap($hex, $cutpoint, ':', $cutpoint), 3);
// convert each tuple to decimal
$rgb[0] = (isset($rgb[0]) ? hexdec($rgb[0]) : 0);
$rgb[1] = (isset($rgb[1]) ? hexdec($rgb[1]) : 0);
$rgb[2] = (isset($rgb[2]) ? hexdec($rgb[2]) : 0);
return ($asString ? "{$rgb[0]} {$rgb[1]} {$rgb[2]}" : $rgb);
}
/**
* Reads selected exif meta data from jpg images and populates $this->imageMeta with appropriate values if found
*
*/
private function gatherImageMeta() {
//only attempt to retrieve info if exif exists
if(function_exists("exif_read_data") && $this->format == 'JPG') {
$imageData = @exif_read_data($this->fileName);
if(isset($imageData['Make']))
$this->imageMeta['make'] = ucwords(strtolower($imageData['Make']));
if(isset($imageData['Model']))
$this->imageMeta['model'] = $imageData['Model'];
if(isset($imageData['COMPUTED']['ApertureFNumber'])) {
$this->imageMeta['aperture'] = $imageData['COMPUTED']['ApertureFNumber'];
$this->imageMeta['aperture'] = str_replace('/','',$this->imageMeta['aperture']);
}
if(isset($imageData['ExposureTime'])) {
$exposure = explode('/',$imageData['ExposureTime']);
$exposure = round($exposure[1]/$exposure[0],-1);
$this->imageMeta['exposure'] = '1/' . $exposure . ' second';
}
if(isset($imageData['Flash'])) {
if($imageData['Flash'] > 0) {
$this->imageMeta['flash'] = 'Yes';
}
else {
$this->imageMeta['flash'] = 'No';
}
}
if(isset($imageData['FocalLength'])) {
$focus = explode('/',$imageData['FocalLength']);
$this->imageMeta['focalLength'] = round($focus[0]/$focus[1],2) . ' mm';
}
if(isset($imageData['DateTime'])) {
$date = $imageData['DateTime'];
$date = explode(' ',$date);
$date = str_replace(':','-',$date[0]) . ' ' . $date[1];
$this->imageMeta['dateTaken'] = date('m/d/Y g:i A',strtotime($date));
}
}
}
/**
* Rotates image either 90 degrees clockwise or counter-clockwise
*
* @param string $direction
*/
public function rotateImage($direction = 'CW') {
if($direction == 'CW') {
$this->workingImage = imagerotate($this->workingImage,-90,0);
}
else {
$this->workingImage = imagerotate($this->workingImage,90,0);
}
$newWidth = $this->currentDimensions['height'];
$newHeight = $this->currentDimensions['width'];
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $newWidth;
$this->currentDimensions['height'] = $newHeight;
}
}
?>
