Question

此时，我对于一个名为 this-thing.png 的图像（从 photoshop CS5 中创建为PNG24）感到非常困惑，被上传到{ {3}} image/jpeg。

kcfinder

使用分析，显示图像完全是100％PNG

C:\TrID>trid C:\users\michael\downloads\this-thing.png

TrID/32 - File Identifier v2.20 - (C) 2003-15 By M.Pontello
Definitions found:  3790
Analyzing...

Collecting data from file: C:\users\michael\downloads\this-thing.png
100.0% (.PNG) Portable Network Graphics (16000/1)

但是当 $ _ FILES [（key（$ _ FILES）] ['tmp_name'] 中的变量数据到达 kcfinder \ core \ class \ browser.php 时 moveUploadFile （作为参数 $ file ）...来自tmp_name的mime类型显示为JPEG而不是PNG。

为了测试目的，修改后的函数包括来自TriID

的代码

protected function moveUploadFile($file, $dir) {

    $message = $this->checkUploadedFile($file);

    if ($message !== true) {
        if (isset($file['tmp_name']))
            @unlink($file['tmp_name']);
        return "{$file['name']}: $message";
    }

    $filename = $this->normalizeFilename($file['name']);
    $target = "$dir/" . file::getInexistantFilename($filename, $dir);

    echo "<h3>PHP_FILES foreach</h3>";

    foreach ($_FILES['upload']['name'] as $key => $value){    
        echo "<pre>";
        print_r(getimagesize($_FILES['upload']['tmp_name'][$key]));
        echo "</pre>";
    }

    echo "<h3>TEMP FILE</h3>";
    echo "</strong>file variable</strong>";
    echo "<pre>";
    print_r($file);
    echo "</pre>";

    echo "</strong>file.tmp_name</strong>";
    echo "<pre>";
    print_r($file['tmp_name']);
    echo "</pre>";

    $tmp_name_imagesize = getimagesize($file['tmp_name']);

    echo "<pre>";
    print_r($tmp_name_imagesize);
    echo "</pre>";

    if (imagetypes() & IMG_PNG) { echo "PNG Supported"; } else { echo "PNG not supported."; }

    // mkaatman - move tmp file to /tmp/ to check its MD5SUM result
    $temporary_file_path = $file['tmp_name'] . ".uploaded";
    move_uploaded_file($file['tmp_name'], $temporary_file_path);

    die();

}

结果，在上传文件 this-thing.png 期间，显示媒体类型实际上是 JPG 而不是 PNG （这是一部分，我似乎无法绕过我的脑袋）。

getimagesize() not returning false

显然，此文件php92C2.tmp.uploaded是上传的文件，位于/tmp/目录。

http://iforce.co.nz/i/kgcgf2af.pyo.png

我已使用.png将Windows Rename添加到文件的末尾，以进行文件分析。

C:\TrID>trid C:\users\michael\downloads\php92C2.tmp.uploaded.png

TrID/32 - File Identifier v2.20 - (C) 2003-15 By M.Pontello
Definitions found:  3790
Analyzing...

Collecting data from file: C:\users\michael\downloads\php92C2.tmp.uploaded.png
 50.0% (.JPG) JFIF JPEG Bitmap (4003/3)
 37.4% (.JPG) JPEG Bitmap (3000/1)
 12.4% (.MP3) MP3 audio (1000/1)

但如果图像是通过PHP直接测试的（复制+粘贴到目录中）

<?php

$image_file = "this-thing.png";
$image_file_details = getimagesize($image_file);

echo "<pre>";
print_r($image_file_details);
echo "</pre>";

?>

结果，读取图像实际上是PNG。

Array
(
    [0] => 800
    [1] => 300
    [2] => 3
    [3] => width="800" height="300"
    [bits] => 8
    [mime] => image/png
)

kcfinder / cache / base.js 函数函数_.initUploadButton = function（）中使用的表单是您的基本上传表单。

<div id="upload" style="top:5px;width:77px;height:31px">
    <form enctype="multipart/form-data" method="post" target="uploadResponse" action="browse.php?type=image&lng=en&opener=ckeditor&act=upload"><input type="file" name="upload[]" onchange="_.uploadFile(this.form)" style="height:31px" multiple="multiple" /><input type="hidden" name="dir" value="" /></form>
</div>

最后来自php

的KCFINDER.Config的一些信息

CONFIG.imageDriversPriority

imagick gmagick gd

CONFIG.deniedExts

exe com msi bat php phps phtml php3 php4 cgi pl htaccess htm html

CONFIG.types

Array
(
    [image] => 7z aiff asf avi bmp csv doc fla flv gif gz gzip jpeg jpg mid mov mp3 mp4 mpc mpeg mpg ods odt pdf png ppt pxd qt ram rar rm rmi rmvb rtf sdc sitd swf sxc sxw tar tgz tif tiff txt vsd wav wma wmv xls xml zip
    [images] => 7z aiff asf avi bmp csv doc fla flv gif gz gzip jpeg jpg mid mov mp3 mp4 mpc mpeg mpg ods odt pdf png ppt pxd qt ram rar rm rmi rmvb rtf sdc sitd swf sxc sxw tar tgz tif tiff txt vsd wav wma wmv xls xml zip
    [files] => 7z aiff asf avi bmp csv doc fla flv gif gz gzip jpeg jpg mid mov mp3 mp4 mpc mpeg mpg ods odt pdf png ppt pxd qt ram rar rm rmi rmvb rtf sdc sitd swf sxc sxw tar tgz tif tiff txt vsd wav wma wmv xls xml zip
    [uploads] => 7z aiff asf avi bmp csv doc fla flv gif gz gzip jpeg jpg mid mov mp3 mp4 mpc mpeg mpg ods odt pdf png ppt pxd qt ram rar rm rmi rmvb rtf sdc sitd swf sxc sxw tar tgz tif tiff txt vsd wav wma wmv xls xml zip
    [mimages] => *mime image/gif image/png image/jpeg
)

基于所有这些信息，我似乎无法弄清楚为什么在地球上将图像作为PNG上传，以JPEG格式返回。

编辑：我已经测试过kcfinder使用从mspaint创建的图像（这是令人困惑的地方）

经过测试的PNG图像。

结果（基于上面的代码）。

C:\TrID>trid C:\users\michael\Pictures\breaking-bad.png

TrID/32 - File Identifier v2.20 - (C) 2003-15 By M.Pontello
Definitions found:  3790
Analyzing...

Collecting data from file: C:\users\michael\Pictures\breaking-bad.png
100.0% (.PNG) Portable Network Graphics (16000/1)

C:\TrID>

编辑：PNG支持（回复马克曼）

if (imagetypes() & IMG_PNG) {
    echo "PNG Supported";
} else {
    echo "PNG not supported.";
}

编辑：我发现图片从PNG转换为JPG的位置

如果在checkUploadedFile期间moveUploadFile被注释掉，则this-thing.png文件会以预期的PNG格式显示....

protected function checkUploadedFile(array $aFile=null) {
    $config = &$this->config;
    $file = ($aFile === null) ? $this->file : $aFile;

    if (!is_array($file) || !isset($file['name']))
        return $this->label("Unknown error");

    if (is_array($file['name'])) {
        foreach ($file['name'] as $i => $name) {
            $return = $this->checkUploadedFile(array(
                'name' => $name,
                'tmp_name' => $file['tmp_name'][$i],
                'error' => $file['error'][$i]
            ));
            if ($return !== true)
                return "$name: $return";
        }
        return true;
    }

    $extension = file::getExtension($file['name']);
    $typePatt = strtolower(text::clearWhitespaces($this->types[$this->type]));

    // CHECK FOR UPLOAD ERRORS
    if ($file['error'])
        return
            ($file['error'] == UPLOAD_ERR_INI_SIZE) ?
                $this->label("The uploaded file exceeds {size} bytes.",
                    array('size' => ini_get('upload_max_filesize'))) : (
            ($file['error'] == UPLOAD_ERR_FORM_SIZE) ?
                $this->label("The uploaded file exceeds {size} bytes.",
                    array('size' => $_GET['MAX_FILE_SIZE'])) : (
            ($file['error'] == UPLOAD_ERR_PARTIAL) ?
                $this->label("The uploaded file was only partially uploaded.") : (
            ($file['error'] == UPLOAD_ERR_NO_FILE) ?
                $this->label("No file was uploaded.") : (
            ($file['error'] == UPLOAD_ERR_NO_TMP_DIR) ?
                $this->label("Missing a temporary folder.") : (
            ($file['error'] == UPLOAD_ERR_CANT_WRITE) ?
                $this->label("Failed to write file.") :
                $this->label("Unknown error.")
        )))));

    // HIDDEN FILENAMES CHECK
    elseif (substr($file['name'], 0, 1) == ".")
        return $this->label("File name shouldn't begins with '.'");

    // EXTENSION CHECK
    elseif (
        (substr($file['name'], -1) == ".") ||
        !$this->validateExtension($extension, $this->type)
    )
        return $this->label("Denied file extension.");

    // SPECIAL DIRECTORY TYPES CHECK (e.g. *img)
    elseif (preg_match('/^\*([^ ]+)(.*)?$/s', $typePatt, $patt)) {
        list($typePatt, $type, $params) = $patt;
        $class = __NAMESPACE__ . "\\type_$type";
        if (class_exists($class)) {
            $type = new $class();
            $cfg = $config;
            $cfg['filename'] = $file['name'];
            if (strlen($params))
                $cfg['params'] = trim($params);
            $response = $type->checkFile($file['tmp_name'], $cfg);
            if ($response !== true)
                return $this->label($response);
        } else
            return $this->label("Non-existing directory type.");
    }

    // IMAGE RESIZE
    $img = image::factory($this->imageDriver, $file['tmp_name']);
    if (!$img->initError && !$this->imageResize($img, $file['tmp_name']))
        return $this->label("The image is too big and/or cannot be resized.");

    return true;
}

输出为PNG Supported.

Answer 1

这是一个非常混乱的问题，我有。但我已设法修复它。

涉及的步骤如下

打开文件kcfinder/core/class/uploader.php找到函数imageResize。然后修改this.output代码。

在：

    // WRITE TO FILE
    return $img->output("jpeg", array(
        'file' => $file,
        'quality' => $this->config['jpegQuality']
    ));

后：

    // Check the EXTENSION OF THIS FILE
    if($file && is_string($file) && file_exists($file)) {
        $file_imgsize = @getimagesize($file);
        // Get the EXPECTED EXTENSION from this MIME
        if($file_imgsize && !empty($file_imgsize)) {
            $fileMimeInteger = $file_imgsize[2];
            $outputFileExtension = @image_type_to_extension($fileMimeInteger);
            $outputFileExtension = str_replace('.', '', $outputFileExtension);
        }
    }

    // Force Jpeg
    if(!$outputFileExtension) {
        $outputFileExtension = "jpeg";
    }

    // WRITE TO FILE
    return $img->output($outputFileExtension, array(
        'file' => $file,
        'quality' => $this->config['jpegQuality']
    ));

功能：

protected function imageResize($image, $file=null) {

        if (!($image instanceof image)) {
            $img = image::factory($this->imageDriver, $image);
            if ($img->initError) return false;
            $file = $image;
        } elseif ($file === null) {
             return false;
        }
        else {
            $img = $image;
        }

        $orientation = 1;
        if (function_exists("exif_read_data")) {
            $orientation = @exif_read_data($file);
            $orientation = isset($orientation['Orientation']) ? $orientation['Orientation'] : 1;
        }

        // IMAGE WILL NOT BE RESIZED WHEN NO WATERMARK AND SIZE IS ACCEPTABLE
        if ((
                !isset($this->config['watermark']['file']) ||
                (!strlen(trim($this->config['watermark']['file'])))
            ) && (
                (
                    !$this->config['maxImageWidth'] &&
                    !$this->config['maxImageHeight']
                ) || (
                    ($img->width <= $this->config['maxImageWidth']) &&
                    ($img->height <= $this->config['maxImageHeight'])
                )
            ) &&
            ($orientation == 1)
        )
            return true;

        // PROPORTIONAL RESIZE
        if ((!$this->config['maxImageWidth'] || !$this->config['maxImageHeight'])) {

            if ($this->config['maxImageWidth'] &&
                ($this->config['maxImageWidth'] < $img->width)
            ) {
                $width = $this->config['maxImageWidth'];
                $height = $img->getPropHeight($width);

            } elseif (
                $this->config['maxImageHeight'] &&
                ($this->config['maxImageHeight'] < $img->height)
            ) {
                $height = $this->config['maxImageHeight'];
                $width = $img->getPropWidth($height);
            }

            if (isset($width) && isset($height) && !$img->resize($width, $height))
                return false;

        // RESIZE TO FIT
        } elseif (
            $this->config['maxImageWidth'] && $this->config['maxImageHeight'] &&
            !$img->resizeFit($this->config['maxImageWidth'], $this->config['maxImageHeight'])
        )
            return false;

        // AUTO FLIP AND ROTATE FROM EXIF
        if ((($orientation == 2) && !$img->flipHorizontal()) ||
            (($orientation == 3) && !$img->rotate(180)) ||
            (($orientation == 4) && !$img->flipVertical()) ||
            (($orientation == 5) && (!$img->flipVertical() || !$img->rotate(90))) ||
            (($orientation == 6) && !$img->rotate(90)) ||
            (($orientation == 7) && (!$img->flipHorizontal() || !$img->rotate(90))) ||
            (($orientation == 8) && !$img->rotate(270))
        )
            return false;
        if (($orientation >= 2) && ($orientation <= 8) && ($this->imageDriver == "imagick"))
            try {
                $img->image->setImageProperty('exif:Orientation', "1");
            } catch (\Exception $e) {}

        // WATERMARK
        if (isset($this->config['watermark']['file']) &&
            is_file($this->config['watermark']['file'])
        ) {
            $left = isset($this->config['watermark']['left'])
                ? $this->config['watermark']['left'] : false;
            $top = isset($this->config['watermark']['top'])
                ? $this->config['watermark']['top'] : false;
            $img->watermark($this->config['watermark']['file'], $left, $top);
        }

        // Check the EXTENSION OF THIS FILE
        if($file && is_string($file) && file_exists($file)) {
            $file_imgsize = @getimagesize($file);
            // Get the EXPECTED EXTENSION from this MIME
            if($file_imgsize && !empty($file_imgsize)) {
                $fileMimeInteger = $file_imgsize[2];
                $outputFileExtension = @image_type_to_extension($fileMimeInteger);
                $outputFileExtension = str_replace('.', '', $outputFileExtension);
            }
        }

        // Force Jpeg
        if(!$outputFileExtension) {
            $outputFileExtension = "jpeg";
        }

        // WRITE TO FILE
        return $img->output($outputFileExtension, array(
            'file' => $file,
            'quality' => $this->config['jpegQuality']
        ));

    }

接下来，路径class_image_gd.php中的文件kcfinder/lib/class_image_gd.php会查找函数output_png，以便更改quality的工作方式（这可修复与PHP相关的错误，＆＃34;压缩必须介于0-9和＃34;）之间。

protected function output_png(array $options=array()) {
    $file = isset($options['file']) ? $options['file'] : null;
    $quality = isset($options['quality']) ? $options['quality'] : null;
    $filters = isset($options['filters']) ? $options['filters'] : null;

    if (($file === null) && !headers_sent()) {
        header("Content-Type: image/png");
    }

    // Compression must be between 0-9 - 2/02/2016
    if($quality && is_numeric($quality)) {
        $quality = $quality < 100 ? round(($quality / 100) * 10) : null; 
    } else {
        $quality = null;
    }

    return imagepng($this->image, $file, $quality, $filters);
}

结果：

http://iforce.co.nz/i/q2r5xjr0.b52.png

在KCFINDER 3.12上使用mime“image / jpeg”上传PHP PNG图像

1 个答案: