我编写了个人资料图像系统，让用户上传自己的个人资料图片，我想将上传的图片调整到一定的宽度和高度 这是代码使用
function user_prof_img($image_temp,$image_extn,$conn){
include_once 'ImageManipulator.php';
ob_start();
$username_id = $_SESSION['id'];
$manipulator = new ImageManipulator($_FILES['profile_imge']['tmp_name']);
$newImage = $manipulator->resample(200, 200);
$newNamePrefix = time() . '_';
$manipulator->save('../profile_image/'
. $newNamePrefix . $_FILES['profile_imge']['name'] . '.' . $image_extn);
$image_path = '../profile_image/' . substr(md5(time()), 0 , 10) . '.' . $image_extn;
move_uploaded_file($image_temp,$image_path);
$update_img = "UPDATE users SET profile_img = '$image_path' WHERE users.id='$username_id'";
$updated_img = mysqli_query($conn,$update_img);
if (!$updated_img) {
echo "sorry an error happens while we processes your image please try again later";
}else {
header("Location: ../browser-games/index");
}
}
if (isset($_POST['submit_img'])) {
if (empty($_FILES['profile_imge']['name']) === true) {
echo "<script>alert('please choose an image to upload')</script>";
}else {
$allowed = array('jpg','jpeg','png');
$image_name = $_FILES['profile_imge']['name'];
$image_extn = strtolower(end(explode('.', $image_name)));
$image_size = $_FILES['profile_imge']['size'];
$image_temp = $_FILES['profile_imge']['tmp_name'];
if (in_array($image_extn,$allowed) === true) {
user_prof_img($image_temp,$image_extn,$conn);
}else {
echo "<script>alert('incorrect image type. allowed: ".implode(', ', $allowed)."')</script>";
}
}
}
个人资料图片显示在
中的页面 <?php
if(isset($_SESSION['id'])){
$username_id = $_SESSION['id'];
$select_img = "SELECT * FROM users WHERE users.id=$username_id";
$get_img = mysqli_query($conn,$select_img);
if (!$get_img) {
echo "sorry we are unable to pull in data from our database at this moment please try again later";
}else {
if ($img_row = mysqli_fetch_assoc($get_img)){
if (empty($img_row['profile_img']) === false) {
echo '<div class="prof_img_con">
<img src="'.$img_row['profile_img'].'" alt="'.$img_row['username'].'" class="prof_img">
</div>';
}else {
echo '
<form action="" method="POST" enctype="multipart/form-data">
<label for="file"class="file_label">
<div class="prof_img_con"><img src="../profile_image/avatar.png" class="prof_img"
title="Upload Profile Image"></div>
</label>
<input type="file" name="profile_imge" id="file" value="update image">
<div class="submit_con">
<label for="sub_img" class="sub_img" id="img_label">Submit Image</label>
<input type="submit" id="sub_img" name="submit_img">
</div>
';
include "../include/profile_img.php";
}
}else {
echo "<script><alert(sorry an error just happens please refresh the page or try again later)</script>";
}
}
这个ImageManipulator代码在这里
<?php
class ImageManipulator
{
/**
* @var int
*/
protected $width;
/**
* @var int
*/
protected $height;
/**
* @var resource
*/
protected $image;
/**
* Image manipulator constructor
*
* @param string $file OPTIONAL Path to image file or image data as string
* @return void
*/
public function __construct($file = null)
{
if (null !== $file) {
if (is_file($file)) {
$this->setImageFile($file);
} else {
$this->setImageString($file);
}
}
}
/**
* Set image resource from file
*
* @param string $file Path to image file
* @return ImageManipulator for a fluent interface
* @throws InvalidArgumentException
*/
public function setImageFile($file)
{
if (!(is_readable($file) && is_file($file))) {
throw new InvalidArgumentException("Image file $file is not readable");
}
if (is_resource($this->image)) {
imagedestroy($this->image);
}
list ($this->width, $this->height, $type) = getimagesize($file);
switch ($type) {
case IMAGETYPE_GIF :
$this->image = imagecreatefromgif($file);
break;
case IMAGETYPE_JPEG :
$this->image = imagecreatefromjpeg($file);
break;
case IMAGETYPE_PNG :
$this->image = imagecreatefrompng($file);
break;
default :
throw new InvalidArgumentException("Image type $type not supported");
}
return $this;
}
/**
* Set image resource from string data
*
* @param string $data
* @return ImageManipulator for a fluent interface
* @throws RuntimeException
*/
public function setImageString($data)
{
if (is_resource($this->image)) {
imagedestroy($this->image);
}
if (!$this->image = imagecreatefromstring($data)) {
throw new RuntimeException('Cannot create image from data string');
}
$this->width = imagesx($this->image);
$this->height = imagesy($this->image);
return $this;
}
/**
* Resamples the current image
*
* @param int $width New width
* @param int $height New height
* @param bool $constrainProportions Constrain current image proportions when resizing
* @return ImageManipulator for a fluent interface
* @throws RuntimeException
*/
public function resample($width, $height, $constrainProportions = true)
{
if (!is_resource($this->image)) {
throw new RuntimeException('No image set');
}
if ($constrainProportions) {
if ($this->height >= $this->width) {
$width = round($height / $this->height * $this->width);
} else {
$height = round($width / $this->width * $this->height);
}
}
$temp = imagecreatetruecolor($width, $height);
imagecopyresampled($temp, $this->image, 0, 0, 0, 0, $width, $height, $this->width, $this->height);
return $this->_replace($temp);
}
/**
* Enlarge canvas
*
* @param int $width Canvas width
* @param int $height Canvas height
* @param array $rgb RGB colour values
* @param int $xpos X-Position of image in new canvas, null for centre
* @param int $ypos Y-Position of image in new canvas, null for centre
* @return ImageManipulator for a fluent interface
* @throws RuntimeException
*/
public function enlargeCanvas($width, $height, array $rgb = array(), $xpos = null, $ypos = null)
{
if (!is_resource($this->image)) {
throw new RuntimeException('No image set');
}
$width = max($width, $this->width);
$height = max($height, $this->height);
$temp = imagecreatetruecolor($width, $height);
if (count($rgb) == 3) {
$bg = imagecolorallocate($temp, $rgb[0], $rgb[1], $rgb[2]);
imagefill($temp, 0, 0, $bg);
}
if (null === $xpos) {
$xpos = round(($width - $this->width) / 2);
}
if (null === $ypos) {
$ypos = round(($height - $this->height) / 2);
}
imagecopy($temp, $this->image, (int) $xpos, (int) $ypos, 0, 0, $this->width, $this->height);
return $this->_replace($temp);
}
/**
* Crop image
*
* @param int|array $x1 Top left x-coordinate of crop box or array of coordinates
* @param int $y1 Top left y-coordinate of crop box
* @param int $x2 Bottom right x-coordinate of crop box
* @param int $y2 Bottom right y-coordinate of crop box
* @return ImageManipulator for a fluent interface
* @throws RuntimeException
*/
public function crop($x1, $y1 = 0, $x2 = 0, $y2 = 0)
{
if (!is_resource($this->image)) {
throw new RuntimeException('No image set');
}
if (is_array($x1) && 4 == count($x1)) {
list($x1, $y1, $x2, $y2) = $x1;
}
$x1 = max($x1, 0);
$y1 = max($y1, 0);
$x2 = min($x2, $this->width);
$y2 = min($y2, $this->height);
$width = $x2 - $x1;
$height = $y2 - $y1;
$temp = imagecreatetruecolor($width, $height);
imagecopy($temp, $this->image, 0, 0, $x1, $y1, $width, $height);
return $this->_replace($temp);
}
/**
* Replace current image resource with a new one
*
* @param resource $res New image resource
* @return ImageManipulator for a fluent interface
* @throws UnexpectedValueException
*/
protected function _replace($res)
{
if (!is_resource($res)) {
throw new UnexpectedValueException('Invalid resource');
}
if (is_resource($this->image)) {
imagedestroy($this->image);
}
$this->image = $res;
$this->width = imagesx($res);
$this->height = imagesy($res);
return $this;
}
/**
* Save current image to file
*
* @param string $fileName
* @return void
* @throws RuntimeException
*/
public function save($fileName, $type = IMAGETYPE_JPEG)
{
$dir = dirname($fileName);
if (!is_dir($dir)) {
if (!mkdir($dir, 0755, true)) {
throw new RuntimeException('Error creating directory ' . $dir);
}
}
try {
switch ($type) {
case IMAGETYPE_GIF :
if (!imagegif($this->image, $fileName)) {
throw new RuntimeException;
}
break;
case IMAGETYPE_PNG :
if (!imagepng($this->image, $fileName)) {
throw new RuntimeException;
}
break;
case IMAGETYPE_JPEG :
default :
if (!imagejpeg($this->image, $fileName, 95)) {
throw new RuntimeException;
}
}
} catch (Exception $ex) {
throw new RuntimeException('Error saving image file to ' . $fileName);
}
}
/**
* Returns the GD image resource
*
* @return resource
*/
public function getResource()
{
return $this->image;
}
/**
* Get current image resource width
*
* @return int
*/
public function getWidth()
{
return $this->width;
}
/**
* Get current image height
*
* @return int
*/
public function getHeight()
{
return $this->height;
}
}
使用此代码获取已调整大小的图像和原始图像，但原始图像显示在我的页面上而不是调整大小的图像。 如何显示已调整大小的图像并自动删除原始图像？ 并感谢您的帮助
答案 0 :(得分：1)
简而言之，您应该在保存调整大小后的图片路径时将原始文件（$image_path）保存到用户的个人资料中。
我创建了2个新变量，然后在下面使用。这使代码更清晰，更易于阅读：$smallPath和$originalPath分别由ImageManipulator和DB使用。
您也可以使用tempnam（）（http://php.net/manual/en/function.tempnam.php），而不是自己编写唯一的名称逻辑。
我还应该指出，您的数据库查询对SQL注入攻击是开放的。我没有为你修改这个。
include_once 'ImageManipulator.php';
ob_start();
$username_id = $_SESSION['id'];
$manipulator = new ImageManipulator($_FILES['profile_imge']['tmp_name']);
$newImage = $manipulator->resample(200, 200);
$newNamePrefix = time() . '_';
// You can use tempnam() to do the unique logic for you.
$smallPath = '../profile_image/' . $newNamePrefix . $_FILES['profile_imge']['name'] . '.' . $image_extn;
$originalPath = '../profile_image/' . substr(md5(time()), 0 , 10) . '.' . $image_extn;
$manipulator->save($smallPath);
move_uploaded_file($image_temp, $originalPath);
// This is very dangerous. You **need to be using prepared statements.
// Lookup PDO - https://phpdelusions.net/pdo
$update_img = "UPDATE users SET profile_img = '$smallPath' WHERE users.id='$username_id'";
$updated_img = mysqli_query($conn,$update_img);
...