Change the image dimensions when uploading - php

Question

I writing code that uploads an image from a url but I need to change the dimensions of the image to 250px * 250px when it's uploading.
How can I change my code to do that?
Example : If I upload an image of 130px * 185px dimensions, it's saving in my upload dir at 250px *250px automatically.
The code that I use is:
<?php
/* photo uploader*/
if($_POST["submit"]){
$pic = trim($_POST["pic_url"]);
if($pic){
$photo = fopen($pic,"rb");
if($photo){
$valid_exts = array("jpg","jpeg","gif","png","Bmp","TIFF"); // default image only extensions
if($valid_exts){
$newpic = fopen("../../cat/adventure/images/" . basename($pic), "wb"); // replace "downloads" with whatever directory you wish.
if($newpic){
while(!feof($photo)){
// Write the url file to the directory.
fwrite($newpic,fread($photo,1024 * 8),1024 * 8); // write the file to the new directory at a rate of 8kb/sec. until we reach the end.
}
}
}
}
}
}
?>

Answer 1

You can use the following universal function:
include_once("ak_php_img_lib_1.0.php");
$target_file = "uploads/$fileName";
$resized_file = "uploads/resized_$fileName";
$wmax = 200;
$hmax = 150;
ak_img_resize($target_file, $resized_file, $wmax, $hmax, $fileExt);
<?php
// Function for resizing jpg, gif, or png image files
function ak_img_resize($target, $newcopy, $w, $h, $ext) {
list($w_orig, $h_orig) = getimagesize($target);
$scale_ratio = $w_orig / $h_orig;
if (($w / $h) > $scale_ratio) {
$w = $h * $scale_ratio;
} else {
$h = $w / $scale_ratio;
}
$img = "";
$ext = strtolower($ext);
if ($ext == "gif"){
$img = imagecreatefromgif($target);
} else if($ext =="png"){
$img = imagecreatefrompng($target);
} else {
$img = imagecreatefromjpeg($target);
}
$tci = imagecreatetruecolor($w, $h);
// imagecopyresampled(dst_img, src_img, dst_x, dst_y, src_x, src_y, dst_w, dst_h, src_w, src_h)
imagecopyresampled($tci, $img, 0, 0, 0, 0, $w, $h, $w_orig, $h_orig);
imagejpeg($tci, $newcopy, 80);
}
?>