如何在使用PHP上传/压缩img文件时重命名img文件

Question

我想使用php上传img文件，压缩它们，然后重命名它们。我被重新命名的部分卡住了。有人能看看我的代码，告诉我如何实现这一点吗？

这是我的html表单：

<form method='post' action='' enctype='multipart/form-data'>
<input type="file" name="imagefile1" accept="image/*" capture="environment">
<input type="submit" value='upload1' name='upload1'>
</form>

这是我的php代码：

if(isset($_POST['upload1'])){
// Getting file name
$filename = $_FILES['imagefile1']['name'];

// Valid extension
$valid_ext = array('png','jpeg','jpg');
// Location
$location = "uploads/".$filename;
// file extension
$file_extension = pathinfo($location, PATHINFO_EXTENSION);
$file_extension = strtolower($file_extension);
// Check extension
if(in_array($file_extension,$valid_ext)){
// Compress Image
compressImage($_FILES['imagefile1']['tmp_name'],$location,20);
}else{
echo "Invalid file type.";
}
}

// Compress image
function compressImage($source, $destination, $quality) {

$info = getimagesize($source);

if ($info['mime'] == 'image/jpeg') 
$image = imagecreatefromjpeg($source);

elseif ($info['mime'] == 'image/gif') 
$image = imagecreatefromgif($source);
elseif ($info['mime'] == 'image/png') 
$image = imagecreatefrompng($source);
imagejpeg($image, $destination, $quality);}

Answer 1

只需使用您已经检索到的信息为您的图像命名一个新名称：

$filename = $_FILES['imagefile1']['name'];
$ext = pathinfo($filename, PATHINFO_EXTENSION);
$image_name = $yours_new_name.'.'.$ext;