用php脚本调整图像大小

我正在尝试调整我用表单上传的图像的大小。我在这里使用脚本场景：

我还使用以下代码上传图像：

upload.php：

    <?php

    session_start();
    require_once "database.php";
    db_connect();
    require_once "auth.php";
    $current_user = current_user();

    $emailstring = $current_user['email'];

//Check to see if the type of file uploaded is a valid image type
function is_valid_type($file)
{
    //This is an array that holds all the valid image MIME types
    $valid_types = array("image/jpg", "image/jpeg", "image/bmp", "image/gif", "image/png");

    if (in_array($file['type'], $valid_types))
        return 1;
    return 0;   

}

function showContents($array) 
    {

        echo "<pre>";
        print_r($array);
        echo "</pre>";
    }

//Set some constants

//This variable is the path to the image folder where all the images are going to be stored

//Note that there is a trailing forward slash
$TARGET_PATH = "profile_images/";

//Get our POSTed variables
$upload_picture_fileinput = $_FILES['upload_picture_fileinput'];


//Sanitize input
$upload_picture_fileinput['name'] = mysql_real_escape_string($upload_picture_fileinput['name']);

//Build our target path full string.  This is where the file will be moved to
//i.e. profile_images/picture.jpg
$TARGET_PATH .= $upload_picture_fileinput['name'];

if(!is_valid_type($upload_picture_fileinput)) {

    $_SESSION['error'] = "You must upload a jpeg, gif, bmp, or png";
    header("Location: account.php");
    exit;


    }

//attempt to move the file from its temporary directory to its new home
if (move_uploaded_file($upload_picture_fileinput['tmp_name'], $TARGET_PATH)) {

    $sql = "UPDATE `users` SET `profile_image_filename`='" . $upload_picture_fileinput['name'] . "'
                       WHERE email='$emailstring'";


    $result = mysql_query($sql) or die ("Could not insert data into DB: " . mysql_error());

    header("Location: account.php");
    exit;
}
else 
{


    $_SESSION['error'] = "Could not upload file.  Check read/write permissions on the directory";
    header("Location: account.php") ;
    exit;

    }

---

我正在连接数据库，图像文件名保存在我的数据库中。我只是不知道为什么上面的文件路径会打印图片，但在调整大小脚本中不起作用。如果可以的话，请帮忙。谢谢。

看起来像是在$resized_image中添加了html alt标记，当然，它不应该是您输入$image->load（$resized_image）的参数的一部分

尝试将此更改为

<?php
    function createThumbs( $pathToImages, $pathToThumbs, $thumbWidth ) 
    {
      // open the directory
      $dir = opendir( $pathToImages );

      // loop through it, looking for any/all JPG files:
      while (false !== ($fname = readdir( $dir ))) {
        // parse path for the extension
        $info = pathinfo($pathToImages . $fname);
        // continue only if this is a JPEG image
        if ( strtolower($info['extension']) == 'jpg' ) 
        {
          echo "Creating thumbnail for {$fname} <br />";

          // load image and get image size
          $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
          $width = imagesx( $img );
          $height = imagesy( $img );

          // calculate thumbnail size
          $new_width = $thumbWidth;
          $new_height = floor( $height * ( $thumbWidth / $width ) );

          // create a new temporary image
          $tmp_img = imagecreatetruecolor( $new_width, $new_height );

          // copy and resize old image into new image 
          imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

          // save thumbnail into a file
          imagejpeg( $tmp_img, "{$pathToThumbs}{$fname}" );
        }
      }
      // close the directory
      closedir( $dir );
    }
    // call createThumb function and pass to it as parameters the path 
    // to the directory that contains images, the path to the directory
    // in which thumbnails will be placed and the thumbnail's width. 
    // We are assuming that the path will be a relative path working 
    // both in the filesystem, and through the web for links
    createThumbs("upload/","upload/thumbs/",100);
    ?>

---

而不是已经以html呈现为目标的字符串。

看起来像是在$resized_image中添加了html alt标记，当然，该标记不应该是输入到$image->load（$resized_image）中的参数的一部分

尝试将此更改为

<?php
    function createThumbs( $pathToImages, $pathToThumbs, $thumbWidth ) 
    {
      // open the directory
      $dir = opendir( $pathToImages );

      // loop through it, looking for any/all JPG files:
      while (false !== ($fname = readdir( $dir ))) {
        // parse path for the extension
        $info = pathinfo($pathToImages . $fname);
        // continue only if this is a JPEG image
        if ( strtolower($info['extension']) == 'jpg' ) 
        {
          echo "Creating thumbnail for {$fname} <br />";

          // load image and get image size
          $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
          $width = imagesx( $img );
          $height = imagesy( $img );

          // calculate thumbnail size
          $new_width = $thumbWidth;
          $new_height = floor( $height * ( $thumbWidth / $width ) );

          // create a new temporary image
          $tmp_img = imagecreatetruecolor( $new_width, $new_height );

          // copy and resize old image into new image 
          imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

          // save thumbnail into a file
          imagejpeg( $tmp_img, "{$pathToThumbs}{$fname}" );
        }
      }
      // close the directory
      closedir( $dir );
    }
    // call createThumb function and pass to it as parameters the path 
    // to the directory that contains images, the path to the directory
    // in which thumbnails will be placed and the thumbnail's width. 
    // We are assuming that the path will be a relative path working 
    // both in the filesystem, and through the web for links
    createThumbs("upload/","upload/thumbs/",100);
    ?>

---

下面的代码创建了一个名为createThumbs的函数，该函数将获得三个参数。第一个和第二个对应地是指向包含原始图像的目录的路径，以及指向将放置缩略图的目录的路径。第三个参数是缩略图所需的宽度

---

下面的代码创建了一个名为createThumbs的函数，该函数将获得三个参数。第一个和第二个对应地是指向包含原始图像的目录的路径，以及指向将放置缩略图的目录的路径。第三个参数是缩略图所需的宽度

这仍然不会返回已调整大小的image@MichaelSutyak你换了哪一个男人？我也需要这样做。答案有什么变化吗？这仍然没有返回调整大小的答案image@MichaelSutyak你换了哪一个男人？我也需要这样做。答案有什么变化吗？
$image->load('profile_images/' . $row['profile_image_filename']);

<?php
    function createThumbs( $pathToImages, $pathToThumbs, $thumbWidth ) 
    {
      // open the directory
      $dir = opendir( $pathToImages );

      // loop through it, looking for any/all JPG files:
      while (false !== ($fname = readdir( $dir ))) {
        // parse path for the extension
        $info = pathinfo($pathToImages . $fname);
        // continue only if this is a JPEG image
        if ( strtolower($info['extension']) == 'jpg' ) 
        {
          echo "Creating thumbnail for {$fname} <br />";

          // load image and get image size
          $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
          $width = imagesx( $img );
          $height = imagesy( $img );

          // calculate thumbnail size
          $new_width = $thumbWidth;
          $new_height = floor( $height * ( $thumbWidth / $width ) );

          // create a new temporary image
          $tmp_img = imagecreatetruecolor( $new_width, $new_height );

          // copy and resize old image into new image 
          imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

          // save thumbnail into a file
          imagejpeg( $tmp_img, "{$pathToThumbs}{$fname}" );
        }
      }
      // close the directory
      closedir( $dir );
    }
    // call createThumb function and pass to it as parameters the path 
    // to the directory that contains images, the path to the directory
    // in which thumbnails will be placed and the thumbnail's width. 
    // We are assuming that the path will be a relative path working 
    // both in the filesystem, and through the web for links
    createThumbs("upload/","upload/thumbs/",100);
    ?>