Resize Image in PHP

How to resize image through php script

You can try this Image Resize function tutorial

And also you can used this code for resize function(GD).

<?php

$thumb = new Imagick();
$thumb->readImage('myimage.gif');    $thumb->resizeImage(320,240,Imagick::FILTER_LANCZOS,1);
$thumb->writeImage('mythumb.gif');
$thumb->clear();
$thumb->destroy(); 

?>

Or, a shorter version of the same:

<?php

$thumb = new Imagick('myimage.gif');

$thumb->resizeImage(320,240,Imagick::FILTER_LANCZOS,1);
$thumb->writeImage('mythumb.gif');

$thumb->destroy(); 

?>

And also refer this links for Resize image

1.YETANOTHERLinks

2.9Lession

And also converting Base64 for image Refer this Links

Image resize without saving

First of all ensure that url of your image is correct. Lets assume that you have some resize.php for resizing your image.

resize.php

<?php
       $source_image = imagecreatefromjpeg("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSKTUtEWtyngG0EVhrOOZqJYhVPoFg5rzma6Xgn6Sy-RQCDCT950g");
       $source_imagex = imagesx($source_image);
       $source_imagey = imagesy($source_image);
       $dest_imagex = 100;
       $dest_imagey = 100;
       $dest_image = imagecreatetruecolor($dest_imagex, $dest_imagey);
       imagecopyresampled($dest_image, $source_image, 0, 0, 0, 0, 
       $dest_imagex, 
       $dest_imagey, $source_imagex, $source_imagey);
       header("Content-Type: image/jpeg");
       imagejpeg($dest_image,NULL,80);
   ?>

here I just changed URL with an address I'm sure exist

and then use it in some html:

<img src = 'resize.php' />

Resize images in PHP without using third-party libraries?

Finally, I've discovered a way that fit my needs. The following snippet will resize an image to the specified width, automatically calculating the height in order to keep the proportion.

$image = $_FILES["image"]["tmp_name"];
$resizedDestination = $uploadDirectory.md5($randomNumber.$filename)."_RESIZED.jpg";

copy($_FILES, $resizedDestination);

$imageSize = getImageSize($image);
$imageWidth = $imageSize[0];
$imageHeight = $imageSize[1];

$DESIRED_WIDTH = 100;
$proportionalHeight = round(($DESIRED_WIDTH * $imageHeight) / $imageWidth);

$originalImage = imageCreateFromJPEG($image);

$resizedImage = imageCreateTrueColor($DESIRED_WIDTH, $proportionalHeight);

imageCopyResampled($images_fin, $originalImage, 0, 0, 0, 0, $DESIRED_WIDTH+1, $proportionalHeight+1, $imageWidth, $imageHeight);
imageJPEG($resizedImage, $resizedDestination);

imageDestroy($originalImage);
imageDestroy($resizedImage);

To anyone else seeking a complete example, create two files:

<!-- send.html -->

<html>

<head>

    <title>Simple File Upload</title>

</head>

<body>

    <center>

        <div style="margin-top:50px; padding:20px; border:1px solid #CECECE;">

            Select an image.

            <br/>
            <br/>

            <form action="receive.php" enctype="multipart/form-data" method="post">
                <input type="file" name="image" size="40">
                <input type="submit" value="Send">
            </form>

        </div>

    </center>

</body>

<?php

// receive.php

$randomNumber = rand(0, 99999);
$uploadDirectory = "images/";
$filename = basename($_FILES['file_contents']['name']);
$destination = $uploadDirectory.md5($randomNumber.$filename).".jpg";

echo "File path:".$filePath."<br/>";

if (is_uploaded_file($_FILES["image"]["tmp_name"]) == true) {

    echo "File successfully received through HTTP POST.<br/>";

    // Validate the file size, accept files under 5 MB (~5e+6 bytes).

    if ($_FILES['image']['size'] <= 5000000) {

        echo "File size: ".$_FILES["image"]["size"]." bytes.<br/>";

        // Resize and save the image.

        $image = $_FILES["image"]["tmp_name"];
        $resizedDestination = $uploadDirectory.md5($randomNumber.$filename)."_RESIZED.jpg";

        copy($_FILES, $resizedDestination);

        $imageSize = getImageSize($image);
        $imageWidth = $imageSize[0];
        $imageHeight = $imageSize[1];

        $DESIRED_WIDTH = 100;
        $proportionalHeight = round(($DESIRED_WIDTH * $imageHeight) / $imageWidth);

        $originalImage = imageCreateFromJPEG($image);

        $resizedImage = imageCreateTrueColor($DESIRED_WIDTH, $proportionalHeight);

        imageCopyResampled($images_fin, $originalImage, 0, 0, 0, 0, $DESIRED_WIDTH+1, $proportionalHeight+1, $imageWidth, $imageHeight);
        imageJPEG($resizedImage, $resizedDestination);

        imageDestroy($originalImage);
        imageDestroy($resizedImage);

        // Save the original image.

        if (move_uploaded_file($_FILES['image']['tmp_name'], $destination) == true) {

            echo "Copied the original file to the specified destination.<br/>";

        }

    }

}

?>

Resize images with PHP, support PNG, JPG

function resize($newWidth, $targetFile, $originalFile) {

    $info = getimagesize($originalFile);
    $mime = $info['mime'];

    switch ($mime) {
            case 'image/jpeg':
                    $image_create_func = 'imagecreatefromjpeg';
                    $image_save_func = 'imagejpeg';
                    $new_image_ext = 'jpg';
                    break;

            case 'image/png':
                    $image_create_func = 'imagecreatefrompng';
                    $image_save_func = 'imagepng';
                    $new_image_ext = 'png';
                    break;

            case 'image/gif':
                    $image_create_func = 'imagecreatefromgif';
                    $image_save_func = 'imagegif';
                    $new_image_ext = 'gif';
                    break;

            default: 
                    throw new Exception('Unknown image type.');
    }

    $img = $image_create_func($originalFile);
    list($width, $height) = getimagesize($originalFile);

    $newHeight = ($height / $width) * $newWidth;
    $tmp = imagecreatetruecolor($newWidth, $newHeight);
    imagecopyresampled($tmp, $img, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);

    if (file_exists($targetFile)) {
            unlink($targetFile);
    }
    $image_save_func($tmp, "$targetFile.$new_image_ext");
}

Resize image on upload

You should try using GD.

// Loads the image
$img = imagecreatefromjpeg($_FILES["immagine"]["tmp_name"]); // Assuming it's a jpeg

// Creates a image to put the thumbnail
$tmp_img = imagecreatetruecolor(<thumbnail width>, <thumbnail height>)

// Resizes the image
imagecopyresampled ( $tmp_img, $img, 0, 0, 0, 0, <thumbnail width>, <thumbnail height>, <original width>, <original height>); // The zeroes are the offsets

// Starts output buffer to not let the image reach the browser
ob_start();

// Render the image
imagejpeg($tmp_image); 

// Capture the image data
$imageData = ob_get_clean();

PHP image resize not working

The function getimagesize() requires a filename, not an image resource. It emits a warning, that's why the image was not valid, because there is a string before the image binary.

$photos = glob($_GET['a'] . '/*.*');
$filename = $photos[array_rand($photos)] ;
$img = imagecreatefromjpeg($filename);
list($width, $height) = getimagesize($filename);

or use imagesx() and imagesy() to get image size using $img.

$photos = glob($_GET['a'] . '/*.*');
$img = imagecreatefromjpeg($photos[array_rand($photos)]);
$width = imagesx($img);
$height = imagesy($img);