Resize Uploaded Image Using PHP

 
Resize Uploaded Image Using PHP

The image functions is the easiest create resize image using PHP. You can customize the image width and height.

The image functions are used to create resize image with PHP:

  • getimagesize ( ):

           Get image original width and height

  • imagecreatetruecolor( ):

           It returns an image specified size

  • imagecopyresampled( ):

           Copy and resize height and width of image with resampling

  • imagecreatefrompng( ), imagecreatefromgif( ) and imagecreatefromjpeg( ):

           Returns an image identifier representing the image obtained from the given filename

  • imagepng( ):  Creates a PNG image
  • imagegif( ):    Creates a GIF image
  • imagejpeg( ): Creates a JPEG image


<?php

if (is_array($_FILES)) {
        $file = $_FILES['image']['tmp_name'];
        $sourceProperties = getimagesize($file);
        $fileNewName = ($lastID + 1);
        $folderPath = "../Images/Slider-Images/";
        $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
        $imageType = $sourceProperties[2];
        $imgefolder = ($lastID + 1) . "." . $ext;

        switch ($imageType) {

            case IMAGETYPE_PNG:
                $imageResourceId = imagecreatefrompng($file);
                $targetLayer = imageResize($imageResourceId, $sourceProperties[0], $sourceProperties[1]);
                imagepng ($targetLayer, $folderPath . $fileNewName. "." . $ext);
                break;


            case IMAGETYPE_GIF:
                $imageResourceId = imagecreatefromgif($file);
                $targetLayer = imageResize($imageResourceId, $sourceProperties[0], $sourceProperties[1]);
                imagegif ($targetLayer, $folderPath . $fileNewName. "." . $ext);
                break;

            case IMAGETYPE_JPEG:
                $imageResourceId = imagecreatefromjpeg($file);
                $targetLayer = imageResize($imageResourceId, $sourceProperties[0], $sourceProperties[1]);
                imagejpeg ($targetLayer, $folderPath . $fileNewName. "." . $ext);
                break;

            case IMAGETYPE_JPG:
                $imageResourceId = imagecreatefromjpeg($file);
                $targetLayer = imageResize($imageResourceId, $sourceProperties[0], $sourceProperties[1]);
                imagejpeg ($targetLayer, $folderPath . $fileNewName. "." . $ext);
                break;

            default:
                echo "Invalid Image type.";
                exit;
                break;
        }
        move_uploaded_file($imgefolder, $folderPath );
        $_POST['image'] = $imgefolder;
    }
    $sql = "INSERT INTO gallary_list (image) VALUES ('" . $_POST [‘image’]. "')";
    mysqli_query($con, $sql);

?>

We can use the function imageResize ( )


function imageResize($imageResourceId, $width, $height) {

    $targetWidth = 1550;
    $targetHeight = 600;

    $targetLayer = imagecreatetruecolor($targetWidth, $targetHeight);
    imagecopyresampled($targetLayer, $imageResourceId, 0, 0, 0, 0, $targetWidth,   $targetHeight, $width, $height);

    return $targetLayer;
}

 




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