PHP image upload implementation code with detailed comments_PHP tutorial

Copy code The code is as follows:

//User uploads image processing file
if ((( $_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES[" file"]["type"] == "image/pjpeg"))&& ($_FILES["file"]["size"] < 100000)){ //Control the types of pictures allowed to be uploaded, the last 100000 is Allowed image sizes
if ($_FILES["file"]["error"] > 0){
echo "Return Code: " . $_FILES["file"]["error"] . "
"; //Error returns
}else{
/* //This is the information of the uploaded image. You can see the effect by removing the comments before and after.
echo "Upload: " . $_FILES["file"]["name"] . "
";
echo "Type: " . $_FILES["file"]["type"] . "
";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb
";
echo "Temp file: " . $ _FILES["file"]["tmp_name"] . "
"; */
if (file_exists("userupload/" . $_FILES["file"]["name"])){
echo $_FILES["file"]["name"] . " already exists. ";
}else{
move_uploaded_file($_FILES["file"]["tmp_name"],"userupload/ " . $_FILES["file"]["name"]);
}

$date=date('Ymdhis'); //Get the current time, such as; 20070705163148
$fileName =$_FILES['file']['name']; //Get the name of the uploaded file
$name=explode('.',$fileName); //Split the file name with '.' to get the suffix name , get an array
$newPath=$date.'.'.$name[1]; //Get a new file as '20070705163148.jpg', that is, the new path
$oldPath=$_FILES[ 'file']['tmp_name']; //Temporary folder, the previous path
rename("userupload/".$fileName,"userupload/".$newPath);

// You can write your SQL statement here. The address of the image is "userupload/".$newPath

?>

}
}else{
echo "Invalid file"; //The image type is wrong or too large
}
?>

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