Can`t to resize an image by php - php

Question

i`m noobie in php, just creating image resize script.
Following code is about what i try to do. Particularly - try to understand how to resize an image after addition , but face with some issue. Please, help me , what is wrong with my code ?
$temp = getimagesize($_FILES['file']['tmp_name']);
$name = '/upload/'.date('Ymd-His').'img'. rand(10000, 99999).'.jpg';
if (!in_array($matches[1], $array2)) {
$errors['file'] = 'Wrong file extension';
} elseif (!in_array($temp['mime'], $array)) {
$errors['file'] = 'Wrong type of file';
} elseif (!move_uploaded_file($_FILES['file']['tmp_name'],'.'.$name)){
$errors['file'] = 'image is not loaded';
} else {
// there is a problem
$tmp = imagecreatetruecolor(200, 150);
$image = imagecreatefromjpeg($name);
imagecopyresampled($tmp, $image, 0,0,0,0, 200, 150, $temp[0], $temp[1]);
imagejpeg($tmp, 100);
// which i can`t fix
}
} else {
$errors['file'] = 'The file is not an image. Valid file types: jpg, png, gif';
}
}
}

Answer 1

use these functions :
##### This function will proportionally resize image #####
function do_resize_image($source, $destination, $image_type, $max_size, $image_width, $image_height, $quality){
if($image_width <= 0 || $image_height <= 0){return false;} //return false if nothing to resize
//do not resize if image is smaller than max size
if($image_width <= $max_size && $image_height <= $max_size){
if(save_image($source, $destination, $image_type, $quality)){
return true;
}
}
//Construct a proportional size of new image
$image_scale = min($max_size/$image_width, $max_size/$image_height);
$new_width = ceil($image_scale * $image_width);
$new_height = ceil($image_scale * $image_height);
$new_canvas = imagecreatetruecolor( $new_width, $new_height ); //Create a new true color image
//Copy and resize part of an image with resampling
if(imagecopyresampled($new_canvas, $source, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height)){
save_image($new_canvas, $destination, $image_type, $quality); //save resized image
}
return true;
}
##### Saves image resource to file #####
function save_image($source, $destination, $image_type, $quality){
switch(strtolower($image_type)){//determine mime type
case 'image/jpeg': case 'image/pjpeg':
imagejpeg($source, $destination, $quality); return true; //save jpeg file
break;
default: return false;
}
}