我在php中有一个用户个人资料，我想让用户选择更改他们的个人资料图片。但是当他们通过$ _POST提交他们的新图片时，我希望将图片调整为：
身高：110px |宽度：与高度相关（如果宽度大于高度）
宽度：110px |高度：与宽度相关（如果高度大于宽度）
当调整大小完成时，我想裁剪图片，使其变为110px x 110px，但我希望它居中。
例如，如果用户上传宽度为110px，高度为200px的图片（调整后的尺寸），裁剪后的新图像将从右侧90xx裁剪110x110。我想要的是从左边裁剪45像素，从右边裁剪45像素，这样它就会居中
该功能会接受.png，.gif和.jpg图片，无论初始格式是什么，都会以jpg格式保存新图片。
我搜索了很多来创建这样的功能，我找到了答案，但是当我尝试改变一些细节时，一切都停止正常工作。
<?php
$userfile_name = $_FILES["sgnIMG"]["name"];
$userfile_tmp = $_FILES["sgnIMG"]["tmp_name"];
$userfile_size = $_FILES["sgnIMG"]["size"];
$filename = basename($_FILES["sgnIMG"]["name"]);
$file_ext = substr($filename, strrpos($filename, ".") + 1);
$large_image_location = $target_path . $filename;
$ext = '';
if ($file_ext == 'jpg') {
$ext = 1;
} else if ($file_ext == 'gif') {
$ext = 2;
} else if ($file_ext == 'png') {
$ext = 3;
} else {
$ext = 0;
}
$target = $target_path . basename($_FILES["sgnIMG"]["name"]);
if (move_uploaded_file($userfile_tmp, $target)) {
$newImg = resize110($target, $ext);
if (isset($_POST['imupd']) && ($_POST['imupd'] == 'up')) {
$sql = "UPDATE users SET avatar='" . str_replace('im/users/', '', $newImg) . "' WHERE id=" . $_SESSION['sesID'] . "";
$result = mysql_query($sql);
if ($result) {
echo '<img src="' . $newImg . '" width="110" title="' . $file_ext . '"/>';
} else {
echo '<img src="im/avatars/px.png" width="110" title="' . $file_ext . '"/>';
}
}
} else {
}
function getHeight($image)
{
$sizes = getimagesize($image);
$height = $sizes[1];
return $height;
}
function getWidth($image)
{
$sizes = getimagesize($image);
$width = $sizes[0];
return $width;
}
function resize110($image, $ext)
{
chmod($image, 0777);
$oldHeight = getHeight($image);
$oldWidth = getWidth($image);
if ($oldHeight < $oldWidth) {
$newImageHeight = 110;
$newImageWidth = ceil((110 * $oldWidth) / $oldHeight);
imagecopyresampled($newImage, $source, -ceil(($newImageWidth - 110) / 2), 0, 0, 0, $newImageWidth, $newImageHeight, $oldWidth, $oldHeight);
} else {
$newImageHeight = ceil((110 * $oldHeight) / $oldWidth);
$newImageWidth = 110;
imagecopyresampled($newImage, $source, 0, -ceil(($newImageHeight - 110) / 2), 0, 0, $newImageWidth, $newImageHeight, $oldWidth, $oldHeight);
}
$newImage = imagecreatetruecolor(110, 110);
chmod($image, 0777);
return $image;
switch ($ext) {
case 1;
$source = imagecreatefromjpeg($image);
break;
case 2;
$source = imagecreatefromgif($image);
break;
case 3;
$source = imagecreatefrompng($image);
break;
}
imagejpeg($newImage, $image, 90);
return $image;
}
答案 0 :(得分：1)
我环顾了很多，并结合了我找到的代码的不同部分。因此，如果高度较大，如果宽度大于110px高度，则此脚本将采用jpg，png图像的gif，将其调整为110px宽度。 ascpect比率将保持不变，因此剩余像素将被除以2将用于居中图像。
对于不同的尺寸，只需在任何地方改变110。
=============================================== ===================================
<?php
// pfpic -> the name of the <input type="file" name="pfpic"/> where user chooses file
$target_path = "im/users/"; // the directory to store the uploaded and then resampled image
$userfile_name = $_FILES["pfpic"]["name"]; // the name that the image file will have once uploaded
$userfile_tmp = $_FILES["pfpic"]["tmp_name"]; // the temporary name the server uses to store the file
$userfile_size = $_FILES["pfpic"]["size"]; // the size of the file that we want to upload
$filename = basename($_FILES["pfpic"]["name"]); // the full name of the file
$file_ext = substr($filename, strrpos($filename, ".") + 1); // the file extension
$large_image_location = $target_path.$filename; // the full path to the file
$ext='';
if($file_ext=='jpg')
{
$ext=1;
}
else if ($file_ext=='gif')
{
$ext=2;
}
else if ($file_ext=='png')
{
$ext=3;
}
else
{
$ext=0;
}
$target = $target_path.basename(sha1($_SESSION['sesID']).'.'.'jpg');
if($ext!=0)
{
if(move_uploaded_file($userfile_tmp,$target))
{
$newImg=resize110($target,$ext);
echo '<img src="'.$newImg.'"/>';
}
else
{
echo 'the file could not be uploaded, please try again';
}
}
else
{
echo 'this file extension is not accepted, please use "jpg", "gif" or "png" file formats';
}
function getHeight($image)
{
$sizes = getimagesize($image);
$height = $sizes[1];
return $height;
}
function getWidth($image)
{
$sizes = getimagesize($image);
$width = $sizes[0];
return $width;
}
function resize110($image,$ext)
{
chmod($image, 0777);
$oldHeight=getHeight($image);
$oldWidth=getWidth($image);
switch ($ext)
{
case 1;
$source = imagecreatefromjpeg($image);
break;
case 2;
$source = imagecreatefromgif($image);
break;
case 3;
$source = imagecreatefrompng($image);
break;
}
$newImage = imagecreatetruecolor(110,110);
$bgcolor = imagecolorallocate($newImage, 255, 255, 255);
imagefill($newImage, 0, 0, $bgcolor); // use this if you want to have a white background instead of black
// we check tha width and height and then we crop the image to the center
if($oldHeight<$oldWidth)
{
$newImageHeight = 110;
$newImageWidth = ceil((110*$oldWidth)/$oldHeight);
imagecopyresampled($newImage,$source,-ceil(($newImageWidth-110)/2),0,0,0,$newImageWidth,$newImageHeight,$oldWidth,$oldHeight);
}
else
{
$newImageHeight = ceil((110*$oldHeight)/$oldWidth);
$newImageWidth = 110;
imagecopyresampled($newImage,$source,0,-ceil(($newImageHeight-110)/2),0,0,$newImageWidth,$newImageHeight,$oldWidth,$oldHeight);
}
//we save the image as jpg resized to 110x110 px and cropped to the center. the old image will be replaced
imagejpeg($newImage,$image,90);
return $image;
}
＆GT;