从调整大小创建新图像时删除扩展名

格式化代码并删除末尾的额外闭卷曲后(同时将函数定义移动到 if 语句之外(，代码应如下所示：

<?php
function setFile($src = null) {
    $this->ext = strtoupper(pathinfo($src, PATHINFO_EXTENSION));
    if (is_file($src) && ($this->ext == "JPG" OR $this->ext == "JPEG")) {
        $this->img_r = ImageCreateFromJPEG($src);
    } elseif (is_file($src) && $this->ext == "PNG") {
        $this->img_r = ImageCreateFromPNG($src);
    } elseif (is_file($src) && $this->ext == "GIF") {
        $this->img_r = ImageCreateFromGIF($src);
    }
    $this->img_w = imagesx($this->img_r);
    $this->img_h = imagesy($this->img_r);
}
function resize($largestSide = 100) {
    $width     = imagesx($this->img_r);
    $height    = imagesy($this->img_r);
    $newWidth  = 0;
    $newHeight = 0;
    if ($width > $height) {
        $newWidth  = $largestSide;
        $newHeight = $height * ($newWidth / $width);
    } else {
        $newHeight = $largestSide;
        $newWidth  = $width * ($newHeight / $height);
    }
    $this->dst_r = ImageCreateTrueColor($newWidth, $newHeight);
    imagecopyresampled($this->dst_r, $this->img_r, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
    $this->img_r = $this->dst_r;
    $this->img_h = $newHeight;
    $this->img_w = $newWidth;
}
function createFile($output_filename = null) {
    if ($this->ext == "JPG" OR $this->ext == "JPEG") {
        imageJPEG($this->dst_r, $this->uploaddir . $output_filename . '.' . $this->ext, $this->quality);
    } elseif ($this->ext == "PNG") {
        imagePNG($this->dst_r, $this->uploaddir . $output_filename . '.' . $this->ext);
    } elseif ($this->ext == "GIF") {
        imageGIF($this->dst_r, $this->uploaddir . $output_filename . '.' . $this->ext);
    }
    $this->output = $this->uploaddir . $output_filename . '.' . $this->ext;
}
function setUploadDir($dirname) {
    $this->uploaddir = $dirname;
}
function flush() {
    $tempFile   = $_FILES['Filedata']['tmp_name'];
    $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
    $targetFile = str_replace('//', '/', $targetPath) . $_FILES['Filedata']['name'];
    imagedestroy($this->dst_r);
    unlink($targetFile);
    imagedestroy($this->img_r);
}
if (!empty($_FILES)) { 
    $tempFile   = $_FILES['Filedata']['tmp_name'];
    $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
    $targetFile = str_replace('//', '/', $targetPath) . $_FILES['Filedata']['name'];
    move_uploaded_file($tempFile, $targetFile);
    $image = new Image();
    $image->setFile($targetFile);
    $image->setUploadDir($targetPath);
    $image->resize(800);
    $image->createFile($_FILES['Filedata']['name']);
    $image->flush();
}

这仍然不起作用，因为您调用这些方法就好像它们是未在任何地方定义的Image对象的成员函数一样。看看 PHP 手册中的对象和类。