Overwrite input in php - php

Question

I'd like to upload an image and resize it in php. I'm using this input to upload:
<td><form action="uploadpic.php" method="POST" enctype="multipart/form-data" />
<input type="file" name="user_image" id="user_image" />
<input name = "button" type = "button" id = "button"
value = "Küldés" onclick="subm(this.form,'_blank');">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
function subm(f,newtarget){
f.submit();
}
</script>
And here is what I'm doing in the uploadpic.php file:
$target_path = "images/clients/";
$target_path = $target_path . basename( $_FILES['user_image']['name']);
function resize_image($file, $w, $h, $crop=FALSE) {
list($width, $height) = getimagesize($file);
echo "original width ". $width." height ". $height;
$r = $width / $height;
if ($crop) {
if ($width > $height) {
$width = ceil($width-($width*abs($r-$w/$h)));
} else {
$height = ceil($height-($height*abs($r-$w/$h)));
}
$newwidth = $w;
$newheight = $h;
} else {
if ($w/$h > $r) {
$newwidth = $h*$r;
$newheight = $h;
} else {
$newheight = $w/$r;
$newwidth = $w;
}
}
echo "new width ". $newwidth." height ". $newheight;
$src = imagecreatefromjpeg($file);
$dst = imagecreatetruecolor($newwidth, $newheight);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
return $dst;
}
if(move_uploaded_file($_FILES['user_image']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['user_image']['name']).
"Image has been uploaded";
$_FILES['user_image'] = resize_image($target_path, 50, 50);
echo "The file ". basename( $_FILES['user_image']['name']).
" Image has been resized";
if(move_uploaded_file($_FILES['user_image']['name'], $target_path)) {
echo "The file ". basename( $_FILES['user_image']['name']).
" Resized image has been uploaded";
}else{
echo " Resized not uploaded because of error #".$_FILES['user_image']['error'];
}
$image_name = 'alma';
$_SESSION['image_name']= 'alma';
} else{
echo "Not uploaded because of error #".$_FILES['user_image']['error'];
}
This works until I trying to overwrite the user_image input. So what I'd like to do is upload the image resize it and upload the resized image. As you can see I'm trying to overwrite the user_image input with this line:
$_FILES['user_image'] = resize_image($target_path, 50, 50);
It not works so I'd like to ask how can I overwrite it and upload it to the server?

Answer 1

I recommend using this great php library Resize Image Class With PHP.
This is the relevant parts of my code that may help you:
<?php
.
.
.
.
require_once('ResizeImage.php');
if(isset($_FILES['photoFile']) && $_FILES['photoFile']['error'] == 0){
$extension = pathinfo($_FILES['photoFile']['name'], PATHINFO_EXTENSION);
if(!in_array(strtolower($extension), $allowed)){
$response = json_encode(array("error" => "true","message" => "The image has the wrong extention"));
echo $response;
exit;
}
/*generate unique filename*/
$t=time();
$x=$_FILES['photoFile']['name'];
$name=md5($x.$t);
/*Moves the uploaded file*/
if(move_uploaded_file($_FILES['photoFile']['tmp_name'], '../uploads/original/'.$name.'.'.$extension)){
$firstimage = '../uploads/original/'.$name.'.'.$extension;
$secondimage = '../uploads/original/'.$name.'.'.$extension;
$small2 = compress($firstimage, $firstimage, 45);
$resize = new ResizeImage($small2);
unset($small2);
$resize->resizeTo(250, 250, 'maxWidth');
$resize->saveImage('../uploads/thumb/'.$name.'.jpg');
unset($resize);
//Compress & resize image large
$large = compress($secondimage, $secondimage, 45);
$resize2 = new ResizeImage($large);
unset($large);
$resize2->resizeTo(560, 560, 'maxWidth');
$resize2->saveImage('../uploads/large/'.$name.'.jpg');
unset($resize2);
/*file location for database*/
$fileThumb = "uploads/thumb/".$name.".jpg";
$fileLarge = "uploads/large/".$name.".jpg";
$response = saveDatabase($nombre,$apellido,$email,$pais,$ciudad,$mensaje,$fileThumb,$fileLarge,$ip);
if ($response == 1) {
$response = json_encode(array("error" => "false","message" => "Thanks"));
echo $response;
}else{
$response = json_encode(array("error" => "true","message" => "unknown error "));
echo $response;
}
}
}
?>
First, we validate that $_FILES['photoFile'] does indeed exist and does not have errors, then we save it to a temporary operation, resize it, compress it and save it in a new location.
Home it helps