Wie konvertieren von Binär-Bild-Daten Bild-Datei und speichern Sie Sie im Ordner, in php

Können Sie folgenden code verwenden, mit der option der saving an image und resizing saved png image without losing its transparent/white effect :

$data = 'binary data of image';
$data = base64_decode($data);
$im = imagecreatefromstring($data);
//assign new width/height for resize purpose
$newwidth = $newheight = 50;
//Create a new image from the image stream in the string
$thumb = imagecreatetruecolor($newwidth, $newheight); 

if ($im !== false) {

    //Select the HTTP-Header for the selected filetype 
    #header('Content-Type: image/png'); //uncomment this code to display image in browser

    //alter or save the image  
    $fileName = $_SERVER['DOCUMENT_ROOT'].'server location to store image/'.date('ymdhis').'.png'; //path to png image
    imagealphablending($im, false); //setting alpha blending on
    imagesavealpha($im, true); //save alphablending setting (important)

    //Generate image and print it
    $resp = imagepng($im, $fileName);

    //resizing png file
    imagealphablending($thumb, false); //setting alpha blending on
    imagesavealpha($thumb, true); //save alphablending setting (important)

    $source = imagecreatefrompng($fileName); //open image
    imagealphablending($source, true); //setting alpha blending on

    list($width, $height, $type, $attr) = getimagesize($fileName);
    #echo '<br>' . $width . '-' . $height . '-' . $type . '-' . $attr . '<br>';

    imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
    $newFilename = $_SERVER['DOCUMENT_ROOT'].'server location to store image/resize_'.date('ymdhis').'.png';
    $resp = imagepng($thumb,$newFilename);

    //frees image from memory
    imagedestroy($im);
    imagedestroy($thumb);

}
else {
    echo 'An error occurred.';
}

Gleiche Weise, die wir tun können für JPEG -, JPG-und GIF-format Bilder.

Hoffe, es hilft den Menschen hier!