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I've read that with gd library i can resize an image but i can't find the correct way do it. What i'm trying to find is a function which resizes-uploads the image (to /uploads/resized) and returns the path of the resized image in order to save it in database for later use. I tried using some functions i found but i'm doing something wrong. I've got wamp64 installed in my windows 7 and in my phpinfo() it seems like gd is enabled. It doesn;t has to be gd i could use any function that resizes image. Any hint will be helpfull.

GD Support  enabled
GD Version  bundled (2.1.0 compatible)
FreeType Support    enabled
FreeType Linkage    with freetype
FreeType Version    2.5.5
GIF Read Support    enabled
GIF Create Support  enabled
JPEG Support    enabled
libJPEG Version 9 compatible
PNG Support enabled
libPNG Version  1.5.18
WBMP Support    enabled
XPM Support enabled
libXpm Version  30411
XBM Support enabled
WebP Support    enabled

This is is the php file i use to upload my images and store information about them to a database: 

<?php
// just in case, let's turn on the errors
include_once("config.php");
error_reporting(E_ALL);
ini_set('display_errors', 1);

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $file = isset($_FILES['fileToUpload']['tmp_name']) ? $_FILES['fileToUpload'] : null;
    // start validation
    try {
        // check if file was NOT provided
        if (!$file ||
            !file_exists($file['tmp_name']) || 
            !is_uploaded_file($file['tmp_name']) || 
            $file['error'] !== UPLOAD_ERR_OK) {
            throw new Exception('No file was given.');
        }
        // check if file is NOT an image
        $size = getimagesize($file['tmp_name']);
        if ($size === false) {
            throw new Exception('File is not an image.');
        }
        // check if file already exists
        $target_dir = 'uploads/';
        $target_file = $target_dir . basename($file['name']);
        if (file_exists($target_file)) {
            throw new Exception('File already exists.');
        }
        // check file size is too large
        if ($file['size'] > 2000000) {
            throw new Exception('File is too large.');
        }
        // check file extension is NOT accepted
        $extension = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
        if (!in_array($extension, ['jpg', 'png', 'gif'])) {
            throw new Exception('Only JPEG, PNG & GIF files are allowed.');
        }
        // if it passes all checks, try uploading file
        //changing the files name 
        $temp = explode(".", $_FILES["fileToUpload"]["name"]); // edw
        $newfilename = round(microtime(true)) . '.' . end($temp); // edw
        $target_file_renamed = $target_dir . $newfilename;   //edw
        if (!move_uploaded_file($file['tmp_name'], $target_file_renamed)) { 
            throw new Exception('There was an error uploading your file.');
        }
        // if we reach this point, then everything worked out!
        //echo 'The file ' . basename($file['name']) . ' has been uploaded.';


        //code to resize and save image to uploads/resized and get the path

        //code to insert into database with pdo
        session_start();
        try{
        $con = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
        $con->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );

        //Code to get photo_category_id
        $sth = $con->prepare('SELECT photo_category_id FROM photo_categories WHERE photo_category = :parameter');
        $sth->bindParam(':parameter', $_POST['category'], PDO::PARAM_STR);
        $sth->execute();
        $idis = $sth->fetchColumn(); //echo $idis will return the photo_category_id

        //Code to update the photos table
        $likes = 0;
        $sql = "INSERT INTO photos(photo_name, photo_text, photo_path, photo_lat, photo_lng, photo_likes, username, photo_category_id)
        VALUES(:name, :text, :path, :lat, :lng, :likes, :username, :category)";
        $stmt = $con->prepare( $sql );
        $stmt->bindValue( "name", basename($file['name']), PDO::PARAM_STR );
        $stmt->bindValue( "text", $_POST['description'], PDO::PARAM_STR );
        $stmt->bindValue( "path", $target_file_renamed, PDO::PARAM_STR );
        $stmt->bindValue( "lat", $_POST['lat'], PDO::PARAM_INT );
        $stmt->bindValue( "lng", $_POST['lng'], PDO::PARAM_INT );
        $stmt->bindValue( "likes", $likes, PDO::PARAM_INT );
        $stmt->bindValue( "username", $_SESSION["user"]->username, PDO::PARAM_STR );
        $stmt->bindValue( "category", $idis, PDO::PARAM_INT );
        $stmt->execute();



        echo 'The file has been uploaded!';
        //echo 'The file ' . basename($file['name']) . ' has been uber fully uploaded.';
        }catch (PDOException $e) {
        echo $e->getMessage();
        }
    } catch (Exception $e) {
        echo $e->getMessage(); //by doing echo here we get the message in javascript alert(data);...
    }
}
?>
captain monk
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1 Answers1

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I cannot see any code that using for reszing image in this code, Here is the simple method for resize image, please store the image path in db for future use.

    <?php

/*
 * PHP GD
 * resize an image using GD library
 */

// File and new size
//the original image has 800x600
$filename = 'images/picture.jpg';
//the resize will be a percent of the original size
$percent = 0.5;

// Content type
header('Content-Type: image/jpeg');

// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = $width * $percent;
$newheight = $height * $percent;

// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);
$source = imagecreatefromjpeg($filename);

// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

// Output and free memory
//the resized image will be 400x300
imagejpeg($thumb);
imagedestroy($thumb);`enter code here`
?>
josdev
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