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我正在尝试修复/调试一个站点，该站点中的所有图像都是由脚本生成的。另一个开发人员创建了这个。现在由于某种原因所有图像都不起作用。
我正在尝试调试代码并尝试在它应该工作的地方破坏它，这样我就可以看到什么被破坏并建立一个基线。但是我找不到正确调试它的方法。
谁能给我指出正确的方向，告诉我如何调试以下脚本或可能破坏的内容？我所做的一切似乎都不起作用。
更新:感谢 Pekka 웃 评论我现在可以看到错误，它说 Warning: imagejpeg(): Filename cannot be empty in/var/www/vhosts/mysticindia.co。 uk/httpdocs/inc/class.images.php 第 496 行
该行是该行之后的imagejpg()
if ($imageModify == "grey") {
imagefilter($this->imageResized, IMG_FILTER_GRAYSCALE);
}
代码
<?php
class images {
var $imageID;
var $imageData;
var $image;
var $width;
var $height;
var $imageResized;
function __construct($imageID = null) {
if ($imageID !== null) {
$this->imageID = $imageID;
$this->imageData = $this->getImageInfo();
}
}
function removeImage() {
if ($this->imageID) {
$query = "DELETE FROM Images ";
$query .= "WHERE ImageID = '%s' ";
$result = RunQuery($query,__LINE__);
$query = sprintf($query, mysql_real_escape_string($this->imageID));
$result = RunQuery($query,__LINE__);
tableEmpty("Images");
}
}
private function buildImageQuery($options=array()) {
global $maxItems;
$maxItems = ((isset($options["maxItems"])) && (!empty($options["maxItems"]))) ? $options["maxItems"] : $maxItems;
$pageID = isset($options["pageID"]) ? $options["pageID"] : "";
$orderBy = ((isset($options["orderBy"])) && (!empty($options["orderBy"]))) ? $options["orderBy"] : "ImageIndex";
$sortBy = ((isset($options["sortBy"])) && (!empty($options["sortBy"]))) ? $options["sortBy"] : "ASC";
$groupBy = (isset($options["groupBy"])) ? $options["groupBy"] : "";
$groupBy = (isset($options["groupBy"])) ? $options["groupBy"] : "";
$limit = isset($options["limit"]) ? $options["limit"] : "";
$searchArray = isset($options["searchArray"]) ? $options["searchArray"] : "";
$recordOffset = ($pageID - 1) * $maxItems;
$query = "SELECT SQL_CALC_FOUND_ROWS i.ImageID, ImageName, ImageIndex FROM Images i ";
$query .= "WHERE i.ImageID != '0' ";
if ((isset($searchArray["catalogue"])) && (!empty($searchArray["catalogue"]))) {
$query .= "AND Catalogue = '" . $searchArray["catalogue"] . "' ";
}
if ((isset($searchArray["catalogueID"])) && (!empty($searchArray["catalogueID"]))) {
if (is_array($searchArray["catalogueID"])) {
$count = 0;
$query .= "AND (";
foreach ($searchArray["catalogueID"] as $catalogueID) {
$count++;
$query .= "CatalogueID= '" . $catalogueID . "' ";
if ($count < count($searchArray["catalogueID"])) {
$query .= "OR ";
}
}
$query .= ") ";
} else {
$query .= "AND CatalogueID= '" . $searchArray["catalogueID"] . "' ";
}
}
if ((isset($searchArray["imageName"])) && (!empty($searchArray["imageName"]))) {
$query .= "AND ImageName = '" . $searchArray["imageName"] . "' ";
}
if ((isset($groupBy)) && (!empty($groupBy))) {
$query .= "GROUP BY " . $groupBy . " ";
}
if ((isset($groupBy)) && (!empty($groupBy))) {
$query .= "GROUP BY " . $groupBy . " ";
}
if ($orderBy) {
$query .= "ORDER BY $orderBy $sortBy ";
}
if (($pageID) && (empty($limit))) {
$query .= "LIMIT $recordOffset, $maxItems ";
} else if (!empty($limit)) {
$query .= "LIMIT $limit ";
}
return $query;
}
function getImages($options=array()) {
global $maxItems;
$maxItems = ((isset($options["maxItems"])) && (!empty($options["maxItems"]))) ? $options["maxItems"] : $maxItems;
$pageID = isset($options["pageID"]) ? $options["pageID"] : "";
$recordOffset = ($pageID - 1) * $maxItems;
$dataArray = array();
$listArray = array();
$maxPages = 0;
$query = $this->buildImageQuery($options);
$result = RunQuery($query,__LINE__);
if (($pageID) && (empty($limit))) {
$query2 = "SELECT FOUND_ROWS() AS NoItems ";
$result2 = RunQuery($query2);
$row2 = mysql_fetch_assoc($result2);
$maxPages = ceil($row2["NoItems"] / $maxItems);
}
if (mysql_num_rows($result) != 0) {
while ($row = mysql_fetch_assoc($result)) {
$listArray[] = $row["ImageID"];
}
$dataArray["maxPages"] = $maxPages;
$dataArray["results"] = $listArray;
return $dataArray;
}
}
function listImages($options=array()) {
$query = $this->buildImageQuery($options);
$result = RunQuery($query,__LINE__);
if (mysql_num_rows($result)) {
$dataArray = array();
while ($row = mysql_fetch_assoc($result)) {
$key = $row["ImageID"];
$value = $row["ImageName"];
$dataArray[$key] = $value;
}
return $dataArray;
} else {
return false;
}
}
function manageImage($options=array()) {
global $sesAdminID;
$imageInfo = isset($options["imageInfo"]) ? $options["imageInfo"] : "";
$catalogue = isset($options["catalogue"]) ? $options["catalogue"] : "";
$catalogueID = isset($options["catalogueID"]) ? $options["catalogueID"] : "";
$imageCaption = isset($options["imageCaption"]) ? $options["imageCaption"] : "";
$imageName = isset($imageInfo["imageName"]) ? $imageInfo["imageName"] : "";
$imageWidth = isset($imageInfo["imageWidth"]) ? $imageInfo["imageWidth"] : "";
$imageHeight = isset($imageInfo["imageHeight"]) ? $imageInfo["imageHeight"] : "";
$imageType = isset($imageInfo["imageType"]) ? $imageInfo["imageType"] : "image/jpeg";
$imageIndex = isset($imageInfo["imageIndex"]) ? $imageInfo["imageIndex"] : "";
if ($this->imageID) {
$query = "UPDATE Images SET ";
$query .= "ImageName = '%s', ";
$query .= "ImageWidth = '%s', ";
$query .= "ImageHeight = '%s', ";
$query .= "ImageType = '%s', ";
$query .= "Catalogue = '%s', ";
$query .= "CatalogueID = '%s', ";
$query .= "ImageCaption = '%s', ";
$query .= "ImageIndex = '%s' ";
$query .= "WHERE ImageID = '" . $this->imageID . "' ";
} else {
$query = "INSERT INTO Images SET ";
$query .= "ImageName = '%s', ";
$query .= "ImageWidth = '%s', ";
$query .= "ImageHeight = '%s', ";
$query .= "ImageType = '%s', ";
$query .= "Catalogue = '%s', ";
$query .= "CatalogueID = '%s', ";
$query .= "ImageCaption = '%s', ";
$query .= "ImageIndex = '%s' ";
}
$query = sprintf($query, mysql_real_escape_string($imageName),
mysql_real_escape_string($imageWidth),
mysql_real_escape_string($imageHeight),
mysql_real_escape_string($imageType),
mysql_real_escape_string($catalogue),
mysql_real_escape_string($catalogueID),
mysql_real_escape_string($imageCaption),
mysql_real_escape_string($imageIndex));
$result = RunQuery($query,__LINE__);
$this->imageID = (!empty($this->imageID)) ? $this->imageID : mysql_insert_id();
return $this->imageID;
}
function updateCaption($imageCaption) {
$query = "UPDATE Images SET ";
$query .= "ImageCaption = '%s' ";
$query .= "WHERE ImageID = '%s' ";
$query = sprintf($query, mysql_real_escape_string($imageCaption),
mysql_real_escape_string($this->imageID));
$result = RunQuery($query,__LINE__);
}
function reOrderImages($options=array()) {
$catalogue = isset($options["catalogue"]) ? $options["catalogue"] : "";
$catalogueID = isset($options["catalogueID"]) ? $options["catalogueID"] : "";
$sortOrder = isset($options["sortOrder"]) ? str_replace("Image_", "", $options["sortOrder"]) : "";
if (!empty($sortOrder)) {
$sortArray = explode(",", $sortOrder);
foreach ($sortArray as $order => $imageID) {
$query = "UPDATE Images SET ";
$query .= "ImageIndex = '%s' ";
$query .= "WHERE ImageID = '%s' ";
$query .= "AND Catalogue = '%s' ";
$query .= "AND CatalogueID = '%s' ";
$query = sprintf($query, mysql_real_escape_string($order),
mysql_real_escape_string($imageID),
mysql_real_escape_string($catalogue),
mysql_real_escape_string($catalogueID));
$result = RunQuery($query,__LINE__);
}
}
}
function returnImageType($options=array()) {
$imageName = ((isset($options["imageName"])) && (!empty($options["imageName"]))) ? $options["imageName"] : "";
$imageType = ((isset($options["imageType"])) && (!empty($options["imageType"]))) ? $options["imageType"] : "";
// Image Extensions
$imgExt["pjpeg"] = "jpg";
$imgExt["jpeg"] = "jpg";
$imgExt["gif"] = "gif";
$imgExt["png"] = "png";
$imgExt["jpg"] = "jpg";
// Image Types
$imgType["pjpeg"] = "jpeg";
$imgType["jpeg"] = "jpeg";
$imgType["jpg"] = "jpeg";
$imgType["gif"] = "gif";
$imgType["png"] = "png";
if ($imageType) {
$tempImageType = explode("/", strtolower($imageType));
$tempImageType = str_replace(" ", "", $tempImageType[count($tempImageType)-1]);
} else if ($imageName) {
$tempImageType = explode("/", strtolower($imageName));
$tempImageType = explode(".", $tempImageType[count($tempImageType)-1]);
$tempImageType = $tempImageType[count($tempImageType)-1];
} else {
return "";
}
$resizeInfo = array();
$resizeInfo["imageType"] = isset($imgType[$tempImageType]) ? $imgType[$tempImageType] : "jpeg";
$resizeInfo["imageExt"] = isset($imgExt[$tempImageType]) ? $imgExt[$tempImageType] : "jpg";
return $resizeInfo;
}
function createImageName($imageFolder,$imageName) {
global $documentRoot;
if (file_exists($documentRoot . $imageFolder . $imageName)) {
$imageName = strtotime("now") . "_" . $imageName;
}
return $imageName;
}
function uploadImage($options=array()) {
global $documentRoot, $imageFolder, $maxImageW;
$imageInfo = array();
$imageLocal = ((isset($options["tmp_name"])) && (!empty($options["tmp_name"]))) ? $options["tmp_name"] : "";
$imageType = ((isset($options["type"])) && (!empty($options["type"]))) ? $options["type"] : "";
$imageName = ((isset($options["name"])) && (!empty($options["name"]))) ? $options["name"] : "";
$imageSize = ((isset($options["size"])) && (!empty($options["size"]))) ? $options["size"] : "";
$functionArray = array("imageName"=>$imageName,"imageType"=>$imageType);
$imageTypeInfo = $this->returnImageType($functionArray);
$tempImageType = $imageTypeInfo["imageType"];
$tempImageExt = $imageTypeInfo["imageExt"];
$row = getimagesize($imageLocal);
$width = $row[0];
$height = $row[1];
$imageName = $this->createImageName($imageFolder,fileNameFix($imageName) . "." . $tempImageExt);
if ($width <= $maxImageW) {
copy($imageLocal, $documentRoot . $imageFolder . $imageName);
$imageInfo["imageWidth"] = $width;
$imageInfo["imageHeight"] = $height;
} else {
$functiontoRun = "imagecreatefrom" . $tempImageType;
$this->image = $functiontoRun($imageLocal);
$functionArray = array("origWidth"=>$width,"origHeight"=>$height,"imageWidth"=>$maxImageW);
$resizeImage = $this->resizeImage($functionArray);
$newImageWidth = $resizeImage["CanvasWidth"];
$newImageHeight = $resizeImage["CanvasHeight"];
$image = imagecreatetruecolor($newImageWidth, $newImageHeight);
imagecopyresampled($image, $this->image, 0, 0, 0, 0, $newImageWidth, $newImageHeight, $width, $height);
$functiontoRun = "image" . $tempImageType;
@$functiontoRun($image, $documentRoot . $imageFolder . $imageName) or die("can not create image");
$imageInfo["imageWidth"] = $newImageWidth;
$imageInfo["imageHeight"] = $newImageHeight;
}
$imageInfo["imageType"] = $imageType;
$imageInfo["imageName"] = $imageName;
return $imageInfo;
}
function uploadImages($options=array()) {
$catalogue = isset($options["catalogue"]) ? $options["catalogue"] : "";
$catalogueID = isset($options["catalogueID"]) ? $options["catalogueID"] : "";
$newImages = isset($options["newImages"]) ? $options["newImages"] : "";
$functionArray = array("searchArray"=>$options);
$imageIndex = $this->returnImageIndex($functionArray);
foreach ($newImages as $newImage) {
$imageIndex++;
$imageCaption = $newImage["caption"];
$imageInfo = $this->uploadImage($newImage);
$functionArray = array("imageCaption"=>$imageCaption,"imageInfo"=>$imageInfo,"catalogue"=>$catalogue,"catalogueID"=>$catalogueID,"imageIndex"=>$imageIndex);
$this->imageID = 0;
$this->manageImage($functionArray);
}
}
private function getDimensions($newWidth, $newHeight, $option) {
switch ($option) {
case 'exact':
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
break;
case 'portrait':
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
break;
case 'landscape':
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
break;
case 'auto':
$optionArray = $this->getSizeByAuto($newWidth, $newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
case 'square':
$optionArray = $this->getOptimalCrop($newWidth, $newHeight);
$optimalWidth = $optionArray['optimalWidth'];
$optimalHeight = $optionArray['optimalHeight'];
break;
}
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}
private function getSizeByFixedHeight($newHeight) {
$ratio = $this->width / $this->height;
$newWidth = $newHeight * $ratio;
return $newWidth;
}
private function getSizeByFixedWidth($newWidth) {
$ratio = $this->height / $this->width;
$newHeight = $newWidth * $ratio;
return $newHeight;
}
private function getSizeByAuto($newWidth, $newHeight) {
if ($this->height < $this->width) {
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
} elseif ($this->height > $this->width) {
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
} else {
if ($newHeight < $newWidth) {
$optimalWidth = $newWidth;
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
} else if ($newHeight > $newWidth) {
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
$optimalHeight= $newHeight;
} else {
// *** Sqaure being resized to a square
$optimalWidth = $newWidth;
$optimalHeight= $newHeight;
}
}
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}
private function getOptimalCrop($newWidth, $newHeight) {
$heightRatio = $this->height / $newHeight;
$widthRatio = $this->width / $newWidth;
if ($heightRatio < $widthRatio) {
$optimalRatio = $heightRatio;
} else {
$optimalRatio = $widthRatio;
}
$optimalHeight = $this->height / $optimalRatio;
$optimalWidth = $this->width / $optimalRatio;
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
}
private function crop($optimalWidth, $optimalHeight, $newWidth, $newHeight) {
// *** Find center - this will be used for the crop
$optionArray["cropStartX"] = ( $optimalWidth / 2) - ( $newWidth /2 );
$optionArray["cropStartY"] = ( $optimalHeight/ 2) - ( $newHeight/2 );
return $optionArray;
}
public function resizeImage($options=array()) {
$imageCrop = ((isset($options["imageCrop"])) && (!empty($options["imageCrop"]))) ? $options["imageCrop"] : "landscape";
$this->width = ((isset($options["origWidth"])) && (!empty($options["origWidth"]))) ? $options["origWidth"] : 0;
$this->height = ((isset($options["origHeight"])) && (!empty($options["origHeight"]))) ? $options["origHeight"] : 0;
$newWidth = ((isset($options["imageWidth"])) && (!empty($options["imageWidth"]))) ? $options["imageWidth"] : 0;
$newHeight = ((isset($options["imageHeight"])) && (!empty($options["imageHeight"]))) ? $options["imageHeight"] : 0;
if ((empty($newHeight)) && ($imageCrop == "square")) {
$newHeight = $newWidth;
}
// *** Get optimal width and height - based on $option
$optionArray = $this->getDimensions($newWidth, $newHeight, $imageCrop);
if ($imageCrop == 'square') {
$tempOptions = $this->crop($optionArray["optimalWidth"], $optionArray["optimalHeight"], $newWidth, $newHeight);
$optionArray["cropStartX"] = $tempOptions["cropStartX"];
$optionArray["cropStartY"] = $tempOptions["cropStartY"];
}
$optionArray["CanvasWidth"] = $newWidth;
$optionArray["CanvasHeight"] = (!empty($newHeight)) ? $newHeight : $optionArray["optimalHeight"];
return $optionArray;
}
function showImage($options=array()) {
global $documentRoot, $imageFolder;
$imageSize = ((isset($options["imageSize"])) && (!empty($options["imageSize"]))) ? $options["imageSize"] : "";
$imageCrop = ((isset($options["imageCrop"])) && (!empty($options["imageCrop"]))) ? $options["imageCrop"] : "";
$imageType = ((isset($options["imageType"])) && (!empty($options["imageType"]))) ? $options["imageType"] : "";
$imageName = ((isset($options["imageName"])) && (!empty($options["imageName"]))) ? $options["imageName"] : "";
$imageModify = ((isset($options["imageModify"])) && (!empty($options["imageModify"]))) ? $options["imageModify"] : "";
$imageQuality = ((isset($options["imageQuality"])) && (!empty($options["imageQuality"]))) ? $options["imageQuality"] : 100;
$imageFolder = ((isset($options["imageFolder"])) && (!empty($options["imageFolder"]))) ? $options["imageFolder"] : $imageFolder;
if (($imageType) || ($imageSize) || ($imageCrop)) {
if ((!empty($imageSize)) && (!empty($imageType))) {
$imageSize .= ucfirst($imageType);
} else if ((empty($imageSize)) && (!empty($imageType))) {
$imageSize .= strtolower($imageType);
}
$imageSize .= (!empty($imageCrop)) ? ucfirst($imageCrop) : "";
$tempWidth = lcfirst($imageSize . "W");
$tempHeight = lcfirst($imageSize . "H");
global $$tempWidth, $$tempHeight;
$maxWidth = isset($$tempWidth) ? $$tempWidth : 0;
$maxHeight = isset($$tempHeight) ? $$tempHeight : 0;
}
if (empty($maxWidth)) {
$tempWidth = "maxImageW";
$tempHeight = "maxImageH";
global $$tempWidth, $$tempHeight;
$maxWidth = isset($$tempWidth) ? $$tempWidth : 0;
$maxHeight = isset($$tempHeight) ? $$tempHeight : 0;
}
if (empty($this->imageID)) {
$searchArray = array("imageName"=>$imageName);
$functionArray = array("searchArray"=>$searchArray);
$this->imageID = $this->returnImageID($functionArray);
}
$imageData = $this->getImageInfo();
if (is_array($imageData)) {
$imageName = $imageData["ImageName"];
$width = $imageData["ImageWidth"];
$height = $imageData["ImageHeight"];
$imageType = $imageData["ImageType"];
} else {
$imageType = "";
}
$functionArray = array("imageName"=>$imageName,"imageType"=>$imageType);
$imageTypeInfo = $this->returnImageType($functionArray);
$tempImageType = $imageTypeInfo["imageType"];
$tempImageExt = $imageTypeInfo["imageExt"];
$thisImage = $documentRoot . $imageFolder . $imageName;
if (file_exists($thisImage)) {
if ((empty($width)) || (empty($height))) {
$row = getimagesize($thisImage);
$width = $row[0];
$height = $row[1];
}
if ((isset($maxWidth)) && (($width > $maxWidth) || ($height > $maxHeight))) {
$functiontoRun = "imagecreatefrom" . $tempImageType;
$this->image = $functiontoRun($thisImage);
if (!$this->image) {
$this->image = imagecreatefromjpeg($thisImage);
}
$functionArray = array("imageCrop"=>$imageCrop,"origWidth"=>$width,"origHeight"=>$height,"imageWidth"=>$maxWidth,"imageHeight"=>$maxHeight);
$resizeImage = $this->resizeImage($functionArray);
$optimalWidth = $resizeImage['optimalWidth'];
$optimalHeight = $resizeImage['optimalHeight'];
$canvasWidth = $resizeImage["CanvasWidth"];
$canvasHeight = $resizeImage["CanvasHeight"];
$cropStartX = isset($resizeImage["cropStartX"]) ? $resizeImage["cropStartX"] : 0;
$cropStartY = isset($resizeImage["cropStartY"]) ? $resizeImage["cropStartY"] : 0;
// *** Resample - create image canvas of x, y size
$this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
$background = imagecolorallocate($this->imageResized, 255, 255, 255);
imagefill ($this->imageResized, 0, 0, $background);
imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);
// *** if option is 'crop', then crop too
if ($imageCrop == 'square') {
$crop = $this->imageResized;
//imagedestroy($this->imageResized);
// *** Now crop from center to exact requested size
$this->imageResized = imagecreatetruecolor($canvasWidth , $canvasHeight);
imagecopyresampled($this->imageResized, $crop , 0, 0, $cropStartX, $cropStartY, $canvasWidth, $canvasHeight , $canvasWidth, $canvasHeight);
}
if ($imageModify == "grey") {
imagefilter($this->imageResized, IMG_FILTER_GRAYSCALE);
}
header("Content-type: image/$tempImageType");
imagejpeg($this->imageResized, "", $imageQuality);
exit();
} else {
header("Content-type: image/$tempImageType");
$image = imagecreatefromjpeg($thisImage);
imagejpeg($image);
exit();
}
}
else {
header("HTTP/1.0 404 Not Found");
exit();
}
}
private function grayscale($r, $g, $b) {
return (($r*0.299)+($g*0.587)+($b*0.114));
}
function returnImageID($options=array()) {
$imageID = 0;
$query = $this->buildImageQuery($options);
$result = RunQuery($query,__LINE__);
if (mysql_num_rows($result) != 0) {
$row = mysql_fetch_assoc($result);
$imageID = $row["ImageID"];
}
return $imageID;
}
function returnImageIndex($options=array()) {
$imageIndex = 0;
$query = $this->buildImageQuery($options);
$result = RunQuery($query,__LINE__);
if (mysql_num_rows($result) != 0) {
$row = mysql_fetch_assoc($result);
$imageIndex = $row["ImageIndex"];
}
return $imageIndex;
}
private function getImageInfo() {
$query = "SELECT ImageID, ImageName, ImageWidth, ImageHeight, ImageType, Catalogue, CatalogueID, ImageCaption, ImageIndex FROM Images i ";
$query .= "WHERE ImageID= '%s' ";
$query = sprintf($query, mysql_real_escape_string($this->imageID));
$result = RunQuery($query,__LINE__);
if (mysql_num_rows($result) != 0) {
return mysql_fetch_assoc($result);
}
}
}
?>
最佳答案
当你说:
I am trying to fix/debug a site where all images in the site are being generated by an script.
查看这段代码意味着该站点的图像实际上通过 file_exists() 检查以某种方式存储在文件系统中:
$thisImage = $documentRoot . $imageFolder . $imageName;
if (file_exists($thisImage)) {
if ((empty($width)) || (empty($height))) {
$row = getimagesize($thisImage);
$width = $row[0];
$height = $row[1];
}
if ((isset($maxWidth)) && (($width > $maxWidth) || ($height > $maxHeight))) {
$functiontoRun = "imagecreatefrom" . $tempImageType;
$this->image = $functiontoRun($thisImage);
if (!$this->image) {
$this->image = imagecreatefromjpeg($thisImage);
}
此外，查看大量重复代码以及这组奇怪的 if ( 检查，我会专注于 function showImage($options=array()) {.
现在回复您的评论，告诉我们网站是什么以及图片未加载的事实。
加载这样的 URL:
http://www.mysticindia.co.uk/images/galleries/small/square/JCxTPFAsMGBgCmA.jpg
显示一个错误——我假设它来自你的调试——像这样:
_image.phpA: Resource id #11 Warning: imagejpeg(JC0jQFgsMGBgCmA.jpg): failed to open stream: Permission denied in /var/www/vhosts/mysticindia.co.uk/httpdocs/inc/class.images.php on line 496
failed to open stream 告诉我，当您说图像是由脚本生成时，文件系统交互显然在某个时刻发生。
然后是这个错误:
Permission denied in /var/www/vhosts/mysticindia.co.uk/httpdocs/inc/class.images.php on line 496
似乎告诉我错误不在您的代码中，而是在文件系统权限中。似乎脚本确实在生成衍生缩略图和父图像的其他版本。但在某些时候，脚本会以某种方式将它们缓存到文件系统中。不清楚源图像的来源——数据库中的 BLOB——但我现在最好的建议是查看网站的文件系统权限，看看是否有任何变化。
我的意思是你——或其他人——没有搞砸这个脚本，但它停止工作了，对吧？我敢打赌这个脚本用来缓存衍生品的目录不再存在或拥有不正确的所有权或权限。类似的东西会扼杀这个过程。
关于php - 如何调试图像创建，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20427330/
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