1

我正在尝试调整图像大小。它适用于单个图像。但是对于多个图像，我必须使用循环来一张一张地获取图像。所以我将类及其函数保存在不同的文件中，以免出现类重新声明的错误。所以我有3个文件一个是index.php，一个是class.php，另一个是functions.php，它们都在下面。

我收到调用未定义方法 resize::resizeImage()的错误

下面是我的索引代码

<?php


// *** Include the class

$tmp = "image1.jpg,image2.jpg";

$single=explode(',',$tmp);
foreach($single as $single){

// include_once("class.php");
include_once("class.php");

// *** 1) Initialise / load image
$resizeObj = new resize('./images/'.$single.'');

// *** 2) Resize image (options: exact, portrait, landscape, auto, crop)
$resizeObj -> resizeImage(420, 290, 'auto');

// *** 3) Save image
$resizeObj -> saveImage('1-'.$single.'', 100);

}

?>

下面是我的类文件

Class resize
    {

        private $image;
            private $width;
            private $height;
        private $imageResized;
             }

这是函数文件

<?php


        function __construct($fileName)
        {
            // *** Open up the file
            $this->image = $this->openImage($fileName);

            // *** Get width and height
            $this->width  = imagesx($this->image);
            $this->height = imagesy($this->image);
        }

        ## --------------------------------------------------------

        private function openImage($file)
        {
            // *** Get extension
            $extension = strtolower(strrchr($file, '.'));

            switch($extension)
            {
                case '.jpg':
                case '.jpeg':
                    $img = @imagecreatefromjpeg($file);
                    break;
                case '.gif':
                    $img = @imagecreatefromgif($file);
                    break;
                case '.png':
                    $img = @imagecreatefrompng($file);
                    break;
                default:
                    $img = false;
                    break;
            }
            return $img;
        }

        ## --------------------------------------------------------

        public function resizeImage($newWidth, $newHeight, $option="auto")
        {
            // *** Get optimal width and height - based on $option
            $optionArray = $this->getDimensions($newWidth, $newHeight, $option);

            $optimalWidth  = $optionArray['optimalWidth'];
            $optimalHeight = $optionArray['optimalHeight'];


            // *** Resample - create image canvas of x, y size
            $this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
            imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);


            // *** if option is 'crop', then crop too
            if ($option == 'crop') {
                $this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight);
            }
        }

        ## --------------------------------------------------------

        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 'crop':
                    $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)
            // *** Image to be resized is wider (landscape)
            {
                $optimalWidth = $newWidth;
                $optimalHeight= $this->getSizeByFixedWidth($newWidth);
            }
            elseif ($this->height > $this->width)
            // *** Image to be resized is taller (portrait)
            {
                $optimalWidth = $this->getSizeByFixedHeight($newHeight);
                $optimalHeight= $newHeight;
            }
            else
            // *** Image to be resizerd is a square
            {
                if ($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
            $cropStartX = ( $optimalWidth / 2) - ( $newWidth /2 );
            $cropStartY = ( $optimalHeight/ 2) - ( $newHeight/2 );

            $crop = $this->imageResized;
            //imagedestroy($this->imageResized);

            // *** Now crop from center to exact requested size
            $this->imageResized = imagecreatetruecolor($newWidth , $newHeight);
            imagecopyresampled($this->imageResized, $crop , 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight , $newWidth, $newHeight);
        }

        ## --------------------------------------------------------

        public function saveImage($savePath, $imageQuality="100")
        {
            // *** Get extension
            $extension = strrchr($savePath, '.');
            $extension = strtolower($extension);

            switch($extension)
            {
                case '.jpg':
                case '.jpeg':
                    if (imagetypes() & IMG_JPG) {
                        imagejpeg($this->imageResized, $savePath, $imageQuality);
                    }
                    break;

                case '.gif':
                    if (imagetypes() & IMG_GIF) {
                        imagegif($this->imageResized, $savePath);
                    }
                    break;

                case '.png':
                    // *** Scale quality from 0-100 to 0-9
                    $scaleQuality = round(($imageQuality/100) * 9);

                    // *** Invert quality setting as 0 is best, not 9
                    $invertScaleQuality = 9 - $scaleQuality;

                    if (imagetypes() & IMG_PNG) {
                         imagepng($this->imageResized, $savePath, $invertScaleQuality);
                    }
                    break;

                // ... etc

                default:
                    // *** No extension - No save.
                    break;
            }

            imagedestroy($this->imageResized);
        }

?>

请帮我。提前致谢。

4

3 回答 3

1

请将 php 配置值“display_errors”激活为 true，然后您会看到每次循环时都尝试包含调整大小类。

包括你的班级和脚本的顶部，然后再试一次。

于 2013-10-27T11:12:35.887 回答
0

首先，我建议您对 PHP 中的 OOP 有一些基本的了解：PHP: Classes and Objects - Manual

其次，我讨厌做所有的工作，但这里是：

<?php

Class resize
{
    private $image;
    private $width;
    private $height;
    private $imageResized;

    function __construct($fileName)
    {
        // *** Open up the file
        $this->image = $this->openImage($fileName);

        // *** Get width and height
        $this->width  = imagesx($this->image);
        $this->height = imagesy($this->image);
    }

    ## --------------------------------------------------------

    private function openImage($file)
    {
        // *** Get extension
        $extension = strtolower(strrchr($file, '.'));

        switch($extension)
        {
            case '.jpg':
            case '.jpeg':
                $img = @imagecreatefromjpeg($file);
                break;
            case '.gif':
                $img = @imagecreatefromgif($file);
                break;
            case '.png':
                $img = @imagecreatefrompng($file);
                break;
            default:
                $img = false;
                break;
        }
        return $img;
    }

    ## --------------------------------------------------------

    public function resizeImage($newWidth, $newHeight, $option="auto")
    {
        // *** Get optimal width and height - based on $option
        $optionArray = $this->getDimensions($newWidth, $newHeight, $option);

        $optimalWidth  = $optionArray['optimalWidth'];
        $optimalHeight = $optionArray['optimalHeight'];


        // *** Resample - create image canvas of x, y size
        $this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
        imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);


        // *** if option is 'crop', then crop too
        if ($option == 'crop') {
            $this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight);
        }
    }

    ## --------------------------------------------------------

    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 'crop':
                $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)
        // *** Image to be resized is wider (landscape)
        {
            $optimalWidth = $newWidth;
            $optimalHeight= $this->getSizeByFixedWidth($newWidth);
        }
        elseif ($this->height > $this->width)
        // *** Image to be resized is taller (portrait)
        {
            $optimalWidth = $this->getSizeByFixedHeight($newHeight);
            $optimalHeight= $newHeight;
        }
        else
        // *** Image to be resizerd is a square
        {
            if ($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
        $cropStartX = ( $optimalWidth / 2) - ( $newWidth /2 );
        $cropStartY = ( $optimalHeight/ 2) - ( $newHeight/2 );

        $crop = $this->imageResized;
        //imagedestroy($this->imageResized);

        // *** Now crop from center to exact requested size
        $this->imageResized = imagecreatetruecolor($newWidth , $newHeight);
        imagecopyresampled($this->imageResized, $crop , 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight , $newWidth, $newHeight);
    }

    ## --------------------------------------------------------

    public function saveImage($savePath, $imageQuality="100")
    {
        // *** Get extension
        $extension = strrchr($savePath, '.');
        $extension = strtolower($extension);

        switch($extension)
        {
            case '.jpg':
            case '.jpeg':
                if (imagetypes() & IMG_JPG) {
                    imagejpeg($this->imageResized, $savePath, $imageQuality);
                }
                break;

            case '.gif':
                if (imagetypes() & IMG_GIF) {
                    imagegif($this->imageResized, $savePath);
                }
                break;

            case '.png':
                // *** Scale quality from 0-100 to 0-9
                $scaleQuality = round(($imageQuality/100) * 9);

                // *** Invert quality setting as 0 is best, not 9
                $invertScaleQuality = 9 - $scaleQuality;

                if (imagetypes() & IMG_PNG) {
                     imagepng($this->imageResized, $savePath, $invertScaleQuality);
                }
                break;

            // ... etc

            default:
                // *** No extension - No save.
                break;
        }

        imagedestroy($this->imageResized);
    }
}

用这个替换你的class.php，删除functions.php并确保你的图像是可访问的，因为如果这些文件无法访问，你的代码不会抛出任何错误。

这是一个快速而肮脏的修复。不要依赖它。

于 2013-10-27T15:37:52.240 回答
0

我认为您必须将所有功能放在类文件中

    Class resize
        {

        private $image;
        private $width;
        private $height;
        private $imageResized;

        function __construct($fileName)
        {
            // *** Open up the file
            $this->image = $this->openImage($fileName);

            // *** Get width and height
            $this->width  = imagesx($this->image);
            $this->height = imagesy($this->image);
        }

        // All other functions here ...

       }
于 2013-10-27T12:50:19.320 回答