Resize image before upload

Question

I was looking for simple script for uploading images. I found an interesting one, but I don't know how to modify it to resize the image before upload.

Here is the PHP code:

if (isset($_POST['submit'])) {
 $validextensions = array("jpeg", "jpg", "png");
 $temporary = explode(".", $_FILES["file"]["name"]);
 $file_extension = end($temporary);
 if ((($_FILES["file"]["type"] == "image/png") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/jpeg")) && ($_FILES["file"]["size"] < 100000)//Approx. 100kb files can be uploaded.
 && in_array($file_extension, $validextensions)) {
 if ($_FILES["file"]["error"] > 0) {
 echo "Return Code: " . $_FILES["file"]["error"] . "<br/><br/>";
 } else {
 echo "<span>Your File Uploaded Succesfully...!!</span><br/>";
 echo "<br/><b>File Name:</b> " . $_FILES["file"]["name"] . "<br>";
 echo "<b>Type:</b> " . $_FILES["file"]["type"] . "<br>";
 echo "<b>Size:</b> " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
 echo "<b>Temp file:</b> " . $_FILES["file"]["tmp_name"] . "<br>";
 if (file_exists("upload/" . $_FILES["file"]["name"])) {
 echo $_FILES["file"]["name"] . " <b>already exists.</b> ";
 } else {
 move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"] ["name"]);
 echo "<b>Stored in:</b> " . "upload/" . $_FILES["file"]["name"];
 }
 }
 } else {
 echo "<span>***Invalid file Size or Type***<span>";
 }
}

• user557846: possible duplicate of php resize image
• brianc: I think this is already answered here: stackoverflow.com/questions/6128716/…
• DevManX: I tried many answers regarding this topic, but I couldn't implement them on this code. I am new in this topic, so I hope to find a direct answer regarding this specific problem/code. Thank you.
• Rasclatt: Here is a simple class that will reduce and crop and save to disk:stackoverflow.com/questions/28002244/…

Answer 1

This is a very robust routine.

It resizes, creates, preview size, and creates a thumbnail

Also chooses best best pic type and saves big and thumbnail as a base64 <img>

$thumbWidth = 60;
$thumbHeight = 60;
$previewWidth = 80;
$previewHeight = 60;
$bigWidth = 320;
$bigHeight = 240;
if( is_uploaded_file($_FILES['image1']['tmp_name']) || !($_FILES['image1']['error'] !== UPLOAD_ERR_OK)){
 $save = false;
 $jspan = '';
 $gspan = '';
 $pspan = '';
 switch(strtolower($_FILES['image1']['type'])){
 case 'image/jpeg':
 $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'image/png':
 $image = @imagecreatefrompng($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'image/gif':
 $image = @imagecreatefromgif($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 default:
 $img = @getimagesize($_FILES['image1']['tmp_name']);
 switch(strtolower($img['mime'])){
 case 'image/jpeg':
 $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'image/png':
 $image = @imagecreatefrompng($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'image/gif':
 $image = @imagecreatefromgif($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 default:
 $filename = $_FILES['image1']['name'];
 $ext = substr($filename,-3);
 switch(strtolower($ext)){
 case 'jpg':
 $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'gif':
 $image = @imagecreatefromgif($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 case 'png':
 $image = @imagecreatefrompng($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 default:
 $image = @imagecreatefromjpeg($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 $image = @imagecreatefrompng($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 $image = @imagecreatefromgif($_FILES['image1']['tmp_name']);
 if ($image !== false){$save = true;break;}
 }
 }
 }
}
 if ($save === true){
 $originalWidth = imagesx($image);
 $originalHeight = imagesy($image);
 $scale = min($previewWidth/$originalWidth, $previewHeight/$originalHeight);
 $newWidth = ceil($scale*$originalWidth);
 $newHeight = ceil($scale*$originalHeight);
 $newPic = imagecreatetruecolor($newWidth, $newHeight);
 imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight);
 ob_start();
 imagejpeg($newPic, NULL, 70);
 $jpg = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $jLen = strlen($jpg);
 ob_start();
 imagepng($newPic, NULL, 9);
 $png = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $pLen = strlen($png);
 ob_start();
 imagegif($newPic);
 $gif = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $gLen = strlen($gif);
 if ($gLen < $jLen){
 if ($pLen < $gLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 $pspan = '<span class="size">';
 }
 else{
 $raw = $gif;
 $gif = null;
 $type = 'gif';
 $gspan = '<span class="size">';
 }
 }
 elseif($pLen < $jLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 $pspan = '<span class="size">';
 }
 else{
 $raw = $jpg;
 $jpg = null;
 $type = 'jpg';
 $jspan = '<span class="size">';
 }
 $base64 = base64_encode($raw);
 $thumb1 = "#thumb1{background-image:url('data:image/$type;base64,$base64')}";
 $size = 'Thumb';
 echo "<p>Image $num $size <br>$jspan jpg: $jLen bytes</span>, <br>$gspan gif: $gLen bytes</span>, <br>$pspan png: $pLen bytes</span></p> $thumb1"; 
 $filename = 'thumb1.' . $type;
 $fp = fopen($filename ,"w");
 fwrite($fp, $raw);
 fclose($fp);
 imagedestroy($newPic);
 $filename = "thumb1_$type.html";
 $fp = fopen($filename ,"w");
 fwrite($fp, $thumb1);
 fclose($fp);
 $thumb1 = mysql_escape_string($thumb1);
 @mysql_unbuffered_query("UPDATE `photos` SET `thumb1`='$thumb1' WHERE `id`=$id");
 $scale = min($bigWidth/$originalWidth, $bigHeight/$originalHeight);
 $newWidth = ceil($scale*$originalWidth);
 $newHeight = ceil($scale*$originalHeight);
 $newPic = imagecreatetruecolor($newWidth, $newHeight);
 imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight);
 ob_start();
 imagejpeg($newPic, NULL, 70);
 $jpg = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $jLen = strlen($jpg);
 ob_start();
 imagepng($newPic, NULL, 9);
 $png = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $pLen = strlen($png);
 ob_start();
 imagegif($newPic);
 $gif = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $gLen = strlen($gif);
 if ($gLen < $jLen){
 if ($pLen < $gLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 $pspan = '<span class="size">';
 }
 else{
 $raw = $gif;
 $gif = null;
 $type = 'gif';
 $gspan = '<span class="size">';
 }
 }
 elseif($pLen < $jLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 $pspan = '<span class="size">';
 }
 else{
 $raw = $jpg;
 $jpg = null;
 $type = 'jpg';
 $jspan = '<span class="size">';
 }
 $base64 = base64_encode($raw);
 $size = 'Full Size';
 $filename = 'big1.' . $type;
 $big1 = "<img width=\"$newWidth\" height=\"$newHeight\" src=\"data:image/$type;base64,$base64\" alt =\"profile photo one\"/>";
 echo "<p>Image $num $size <br>$jspan jpg: $jLen bytes</span>, <br>$gspan gif: $gLen bytes</span>, <br>$pspan png: $pLen bytes</span></p> $big1"; 
 $fp = fopen($filename ,"w");
 fwrite($fp, $raw);
 fclose($fp);
 imagedestroy($newPic);
 $filename = "big1_$type.html";
 $fp = fopen($filename ,"w");
 fwrite($fp, $big1);
 fclose($fp);
 $big1 = mysql_escape_string($big1);
 @mysql_unbuffered_query("UPDATE `photos` SET `big1`='$big1' WHERE `id`=$id");
 $scale = min($thumbWidth/$originalWidth, $thumbHeight/$originalHeight);
 $newWidth = ceil($scale*$originalWidth);
 $newHeight = ceil($scale*$originalHeight);
 $newPic = imagecreatetruecolor($newWidth, $newHeight);
 imagecopyresampled($newPic, $image,0, 0, 0, 0,$newWidth, $newHeight, $originalWidth, $originalHeight);
 ob_start();
 imagejpeg($newPic, NULL, 70);
 $jpg = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $jLen = strlen($jpg);
 ob_start();
 imagepng($newPic, NULL, 9);
 $png = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $pLen = strlen($png);
 ob_start();
 imagegif($newPic);
 $gif = ob_get_clean();
 ob_clean();
 ob_end_flush();
 $gLen = strlen($gif);
 if ($gLen < $jLen){
 if ($pLen < $gLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 }
 else{
 $raw = $gif;
 $gif = null;
 $type = 'gif';
 }
 }
 elseif($pLen < $jLen){
 $raw = $png;
 $png = null;
 $type = 'png';
 }
 else{
 $raw = $jpg;
 $jpg = null;
 $type = 'jpg';
 }
 $base64 = base64_encode($raw);
 $size = 'Small Thumb';
 $filename = 'smallThumb.' . $type;
 $smallThumb = "#t$id{margin:0;display:inline-block;width:60px;height:60px;border:0;background-image: background-image:url('data:image/gif;base64,$base64');}";
 echo '<div style="height:60px;width:60px;background-repeat: no-repeat;background-image:background-image:url(' . "'data:image/gif;base64,$base64');\" ></div>\n";
 echo "<br/><p>Image $num $size <br/>jpg: $jLen bytes<br>gif: $gLen bytes<br/>png: $pLen bytes</p> "; 
 $fp = fopen($filename ,"w");
 fwrite($fp, $raw);
 fclose($fp);
 imagedestroy($image);
 imagedestroy($newPic);
 $filename = "smallThumb$type.html";
 $fp = fopen($filename ,"w");
 fwrite($fp,'<!DOCTYPE html><html lang="en"><head><style>' . $smallThumb . '</style></head><body><div id="t9542058256"></div></body></html>');
 fclose($fp);
 $smallThumb = mysql_escape_string($smallThumb);
 @mysql_unbuffered_query("UPDATE `photos` SET `SmallThumb`='$smallThumb' WHERE `id`=$id");
}