Question

我正在开展多页验证的项目。我的主要问题是代码的上传部分。我正在做的是当用户上传他的图像时;我将它们保存在一个临时文件夹中，然后一旦表格填满，我将图像从临时文件夹移动到主文件夹，但在我想要在将图像保存到主文件夹之前调整大小之前。

我如何实现这一目标？

我已经尝试过自己，但无法做到正确。我的代码是

我收到此错误：getimagesize(174349.jpg): failed to open stream: No such file or directory

imageuploaded.php

<?php
define('MAX_FILE_SIZE', 952070);
define('UPLOAD_DIR_TEMP', BASE_URI.'html/temp/');
$max = number_format(MAX_FILE_SIZE/1024, 1).'KB';
// create an array of permitted MIME types
$permitted = array('image/gif', 'image/jpeg', 'image/pjpeg','image/png');   

  if (array_key_exists('upload', $_POST)) {
foreach ($_FILES['image']['name'] as $number => $file) {
// replace any spaces in the filename with underscores
$file = str_replace(' ','_',$file);
$fileNom = pathinfo($_FILES['image']["name"][$number], PATHINFO_FILENAME);
$ext = pathinfo($_FILES['image']["name"][$number],PATHINFO_EXTENSION);
//$soruceimg = $_FILES['image']['tmp_name'];
//echo $file;
// begin by assuming the file is unacceptable
$sizeOK = false;
$typeOK = false;
// check that file is within the permitted size
if ($_FILES['image']['size'][$number] > 0 || $_FILES['image']['size'][$number] <= MAX_FILE_SIZE) {
$sizeOK = true;
}
// check that file is of a permitted MIME type
foreach ($permitted as $type) {
if ($type == $_FILES['image']['type'][$number]) {
$typeOK = true;
break;
}
}

if ($sizeOK && $typeOK) {
switch($_FILES['image']['error'][$number]) {
case 0:

// get the date and time
ini_set('date.timezone', 'Africa/Abidjan');
$now = date('Y-m-d-His');
//$Nfilename = basename(substr($file,0,6).$now).".".$ext ." ";
$successes = move_uploaded_file($_FILES['image']['tmp_name'][$number], UPLOAD_DIR_TEMP.$file);
if ($successes) {
$_SESSION['imgname']= $_FILES['image']['name'];
header('Location: test.php');
    //echo $file;
}
else {
$resultfile[] = "Error uploading $file. Please try again.";
}
break;
case 3:
$resultfile[] = "Error uploading $file. Please try again.";
default:
$resultfile[] = "System error uploading $file. Contact webmaster.";
}
}
elseif ($_FILES['image']['error'][$number] == 4) {
$errNofile[] = 1;
}
else {
$resultfile[] = "$file cannot be uploaded. Maximum size: $max.Acceptable file types: gif, jpg, png.";
}

}
}

imageresize.php

$source = BASE_URI.'html/temp/';
define('THUMBS_DIR', BASE_URI.'html/products/thumbs/');
define('MAX_WIDTH', 200);
define('MAX_HEIGHT', 200);
define('UPLOAD_DIR', BASE_URI.'html/products/');
ini_set('date.timezone', 'Africa/Abidjan');
$now = date('Y-m-d-His');
 if (isset($_SESSION['imgname']) && is_array($_SESSION['imgname']) ) {

  foreach ($_SESSION['imgname'] as $files) {
  echo $files;
  $img = str_replace(" ", "_", $files);
  $ext = pathinfo($img,PATHINFO_EXTENSION);

   if (file_exists($source.$img)) {
    $ext = pathinfo($img,PATHINFO_EXTENSION);
    // strip the extension off the image filename
   $imagetypes = array('/\.gif$/', '/\.jpg$/', '/\.jpeg$/', '/\.png$/');
   $name = preg_replace($imagetypes, '', basename(substr($img,0,6).$now));

   list($width, $height, $type) = getimagesize($img);
   if ($width != $height) {
     echo "file width and height must be same";
     break;
    }
      elseif ( $width < 300 && $height < 300) {
        echo "File must be at least 400 x 400";
        break;
      }
      else{
        $ratio = 1;
        $ratio = MAX_WIDTH/$width;
      }

   $Nfilename = $name.'.'.$ext;
    $moved = rename($source.$img, UPLOAD_DIR.$Nfilename);

  if (!$moved) {
    echo "Problem moving file".$img;
  }
    else{
    // create an image resource for the original
  switch($type) {
      case 1:
        $source = @ imagecreatefromgif($original);
      if (!$source) {
        $result = 'Cannot process GIF files. Please use JPEG or PNG.';
        }
      break;
      case 2:
        $source = imagecreatefromjpeg($original);
      break;
      case 3:
        $source = imagecreatefrompng($original);
      break;
      default:
        $source = NULL;
      $result = 'Cannot identify file type.';
      }

   // make sure the image resource is OK
  if (!$source) {
    $result = 'Problem copying original';
    }
      else {
    // calculate the dimensions of the thumbnail
      $thumb_width = round($width * $ratio);
      $thumb_height = round($height * $ratio);
    // create an image resource for the thumbnail
      $thumb = imagecreatetruecolor($thumb_width, $thumb_height);
    // create the resized copy
    imagecopyresampled($thumb, $source, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height);
    // save the resized copy
    switch($type) {
        case 1:
        if (function_exists('imagegif')) {
          $success = imagegif($thumb, THUMBS_DIR.$name.'_thb.gif');
          $thumb_name = $name.'_thb.gif';
        }
        else {
          $success = imagejpeg($thumb, THUMBS_DIR.$name.'_thb.jpg', 50);
        $thumb_name = $name.'_thb.jpg';
        }
        break;
      case 2:
        $success = imagejpeg($thumb, THUMBS_DIR.$name.'_thb.jpg', 100);
        $thumb_name = $name.'_thb.jpg';
        break;
      case 3:
        $success = imagepng($thumb, THUMBS_DIR.$name.'_thb.png');
        $thumb_name = $name.'_thb.png';
      }
    if ($success) {
      $result = "$thumb_name created";
      }
    else {
      $result = 'Problem creating thumbnail';
      }

    if ($success) {
      echo $thumb_name;
    }

    // remove the image resources from memory
    imagedestroy($source);
    imagedestroy($thumb);
    }   
  }

   }
     else{
      echo "No file exist";
     }

  }

 }

Answer 1

首先将图像转换为位图，然后使用定义比率的位图压缩来压缩大小。您也可以通过声明特定的高度和宽度来压缩图像。

Answer 2

之前我有过这段代码，非常好用，对我有用

class SimpleImage {   
var $image; var $image_type;   
function load($filename) {   

  $image_info = getimagesize($filename); 

  $this->image_type = $image_info[2]; 

  if( $this->image_type == IMAGETYPE_JPEG ) {  $this->image = imagecreatefromjpeg($filename); } 

  elseif( $this->image_type == IMAGETYPE_GIF ) {  $this->image = imagecreatefromgif($filename); } 

    elseif( $this->image_type == IMAGETYPE_PNG ) {  $this->image = imagecreatefrompng($filename); } 
} 

function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) { 

  if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this->image,$filename,$compression); } 

  elseif( $image_type == IMAGETYPE_GIF ) {   imagegif($this->image,$filename); } 

  elseif( $image_type == IMAGETYPE_PNG ) {   imagepng($this->image,$filename); } 

  if( $permissions != null) {   chmod($filename,$permissions); } 
} 

function output($image_type=IMAGETYPE_JPEG) {   
  if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this->image); } 
  elseif( $image_type == IMAGETYPE_GIF ) {   imagegif($this->image); } 
  elseif( $image_type == IMAGETYPE_PNG ) {   imagepng($this->image); } 
} 

function getWidth() {   return imagesx($this->image); } 
function getHeight() {   return imagesy($this->image); } 

function resizeToHeight($height) {   
   $ratio = $height / $this->getHeight(); 
   $width = $this->getWidth() * $ratio; $this->resize($width,$height); 
 }   

function resizeToWidth($width) { 
   $ratio = $width / $this->getWidth(); 
   $height = $this->getheight() * $ratio; $this->resize($width,$height); 
 }   

function scale($scale) { $width = $this->getWidth() * $scale/100; 
   $height = $this->getheight() * $scale/100; $this->resize($width,$height); 
 }   

function resize($width,$height) { 
   $new_image = imagecreatetruecolor($width, $height); 
   imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()); 
   $this->image = $new_image; }   
 }

将其用作prev image，并保存新图像

$imageRes = new SimpleImage();
            $imageRes->load($_SERVER['DOCUMENT_ROOT'] . '/upload/' . $image . '.jpg');//prev image
            $imageRes->resizeToWidth(120);
            $imageRes->save($_SERVER['DOCUMENT_ROOT'] . '/upload/' . $image . '.jpg');//new image

如何在保存到另一个文件夹之前从文件夹移动图像并调整大小？

2 个答案: