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我是一个php noob，并尝试创建图像大小调整脚本，可将上传的图像缩小为更小的维度。使用下面的当前脚本，我可以看到显示的原始图像。新的宽度和高度似乎没有注册。任何帮助表示赞赏。针对不同MIME类型的PHP图像大小调整
<?php
if ($_SERVER['REQUEST_METHOD']=='POST') {
if (isset($_FILES['image']['tmp_name'])) {
if ($_FILES['image']['error']==0){
$new_dir = '/PHP_MySQL_Practice/uploaded/images';
$fullpath = $_SERVER['DOCUMENT_ROOT'].$new_dir;
if(!is_dir($fullpath)) {
mkdir($fullpath, 0777, TRUE);
}
//get file name and type(extension)
$name = $_FILES['image']['name'];
$type = $_FILES['image']['type'];
//separate image name after first "dot"
$separated = explode(".", $name);
//get string before the dot which was stored as the 1st item in the separated array.
$first = $separated[0];
//use php function pathinfo to get extension of image file
$ext = pathinfo($name, PATHINFO_EXTENSION);
//concatenate current timestamp (to avoid file overwrites) with the extracted file 'firstname' and add the extension
$name = time().'_'.$first.'.'.$ext;
$target = $fullpath.'/'.$name;
if (move_uploaded_file($_FILES['image']['tmp_name'], $target)) {
resizeImage($target, $name);
echo '<img src="' . $target . '"/>';
}
}
else {
echo 'there was an error in saving ur image file.';
}
}
else {
echo 'ur image could not be uploaded.';
}
}
else {
?>
<form method="POST" enctype="multipart/form-data">
<label>upload image: </label>
<input type="file" name="image" />
<input type="submit" />
</form>
<?php
}
//function to resize image
function resizeImage($dir, $img) {
list($src_w, $src_h) = getimagesize($dir);
$max_w = 150;
$max_h = 150;
if ($src_w > $max_w) {
$ratio = $max_w/$src_w;
$new_img_w = $src_w * $ratio;
}
else if ($src_h > $max_h) {
$ratio = $max_h/$src_h;
$new_img_h = $src_h * $ratio;
}
$img_mime_type = getimagesize($dir);
switch ($img_mime_type['mime']) {
case 'image/jpeg':
case 'image/pjpeg':
$src = imagecreatefromjpeg($dir);
return $src;
break;
case 'image/gif':
$src = imagecreatefromgif($dir);
return $src;
break;
case 'image/png':
$src = imagecreatefrompng($dir);
return $src;
break;
default:
return FALSE;
break;
}
$new_img = imagecreatetruecolor($new_img_w, $new_img_h);
imagecopyresampled($new_img, $src, 0, 0, 0, 0, $new_img_w, $new_img_h, $max_w, $max_h);
switch ($img_mime_type['mime']) {
case 'image/jpeg':
case 'image/pjpeg':
imagejpeg($new_img, $dir, 100);
break;
case 'image/gif':
imagegif($new_img, $dir);
break;
case 'image/png':
imagepng($new_img, $dir);
break;
default:
return FALSE;
break;
}
imagedestroy($src);
imagedestroy($new_img);
}
?>
看看给定的啧啧，希望这会帮助你，你想要http://blog.webtech11.com/2012/04/21/upload-and-resize-an-image-with-php.html –