作物和水印圖像在php

Question

我想爲用戶輸入添加水印圖像。它必須將處理後的圖像存儲在一個文件夾中。這裏是我用來上傳圖像並添加水印的代碼。

水印正在應用。但空的圖像存儲在服務器中。你能幫我做這個工作嗎？這裏是work I done till now

<?php 
    define('UPLOAD_DIR', 'images/'); 

    $img = $_POST['image-data']; 
    $img = str_replace('data:image/png;base64,', '', $img); 
    $img = str_replace(' ', '+', $img); 
    $data = base64_decode($img); 

    $file = UPLOAD_DIR . uniqid() . '.png'; 
    file_put_contents($file, $data); 




$stamp = imagecreatefrompng('http://mygreetins.esy.es/new/images/watermark.png'); 
$im = imagecreatefrompng($file); 

// Set the margins for the stamp and get the height/width of the stamp image 
$marge_right = 0; 
$marge_bottom = 0; 
$sx = imagesx($stamp); 
$sy = imagesy($stamp); 

// Copy the stamp image onto our photo using the margin offsets and the photo 
// width to calculate positioning of the stamp. 
imagecopy($im, $stamp, imagesx($im) - $sx - $marge_right, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp)); 





$file = UPLOAD_DIR . time() . '.png'; 
    $success = file_put_contents($file, $im); 





echo $file 


?> 

Answer 1

試試這個

if(isset($_FILES['image_file'])) 
{ 
    $max_size = 800; //max image size in Pixels 
    $destination_folder = 'D:/Websites/watermark/images'; 
    $watermark_png_file = 'watermark.png'; //watermark png file 

    $image_name = $_FILES['image_file']['name']; //file name 
    $image_size = $_FILES['image_file']['size']; //file size 
    $image_temp = $_FILES['image_file']['tmp_name']; //file temp 
    $image_type = $_FILES['image_file']['type']; //file type 

    switch(strtolower($image_type)){ //determine uploaded image type 
      //Create new image from file 
      case 'image/png': 
       $image_resource = imagecreatefrompng($image_temp); 
       break; 
      case 'image/gif': 
       $image_resource = imagecreatefromgif($image_temp); 
       break;   
      case 'image/jpeg': case 'image/pjpeg': 
       $image_resource = imagecreatefromjpeg($image_temp); 
       break; 
      default: 
       $image_resource = false; 
     } 

    if($image_resource){ 
     //Copy and resize part of an image with resampling 
     list($img_width, $img_height) = getimagesize($image_temp); 

     //Construct a proportional size of new image 
     $image_scale  = min($max_size/$img_width, $max_size/$img_height); 
     $new_image_width = ceil($image_scale * $img_width); 
     $new_image_height = ceil($image_scale * $img_height); 
     $new_canvas   = imagecreatetruecolor($new_image_width , $new_image_height); 

     if(imagecopyresampled($new_canvas, $image_resource , 0, 0, 0, 0, $new_image_width, $new_image_height, $img_width, $img_height)) 
     { 

      if(!is_dir($destination_folder)){ 
       mkdir($destination_folder);//create dir if it doesn't exist 
      } 

      //center watermark 
      $watermark_left = ($new_image_width/2)-(300/2); //watermark left 
      $watermark_bottom = ($new_image_height/2)-(100/2); //watermark bottom 

      $watermark = imagecreatefrompng($watermark_png_file); //watermark image 
      imagecopy($new_canvas, $watermark, $watermark_left, $watermark_bottom, 0, 0, 300, 100); //merge image 

      //output image direcly on the browser. 
      header('Content-Type: image/jpeg'); 
      imagejpeg($new_canvas, NULL , 90); 

      //Or Save image to the folder 
      //imagejpeg($new_canvas, $destination_folder.'/'.$image_name , 90); 

      //free up memory 
      imagedestroy($new_canvas); 
      imagedestroy($image_resource); 
      die(); 
     } 
    } 
} 

上傳形式

<form action="" id="upload-form" method="post" enctype="multipart/form-data"> 
<input type="file" name="image_file" /> 
<input type="submit" value="Send Image" /> 
</form> 

Answer 2

此功能將拍攝圖像的鏈接，並在圖像的右下角的水印位置。假設水印是200x20像素。

function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 90){ 
    $imgsize = getimagesize($source_file); 
    $width = $imgsize[0]; 
    $height = $imgsize[1]; 
    $mime = $imgsize['mime']; 
    switch($mime){ 
     case 'image/gif': 
      $image_create = "imagecreatefromgif"; 
      $image = "imagegif"; 
      break; 
     case 'image/png': 
      $image_create = "imagecreatefrompng"; 
      $image = "imagepng"; 
      $quality = 90; 
      break; 
     case 'image/jpeg': 
      $image_create = "imagecreatefromjpeg"; 
      $image = "imagejpeg"; 
      $quality = 90; 
      break; 
     default: 
      return false; 
      break; 
    } 
    $dst_img = imagecreatetruecolor($max_width, $max_height); 
    $watermark = imagecreatefrompng("images/watermark.png"); 
    $src_img = $image_create($source_file); 
    $width_new = $height * $max_width/$max_height; 
    $height_new = $width * $max_height/$max_width; 
    $w_xpos=($max_width - 200); 
    $w_ypos=($max_height - 20); 
    //if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa 
    if($width_new > $width){ 
     //cut point by height 
     $h_point = (($height - $height_new)/2); 
     //copy image 
     imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new); 
     imagecopyresampled($dst_img , $watermark , $w_xpos , $w_ypos , 0 , 0 , 200 , 20 , 200 , 20); 
    }else{ 
     //cut point by width 
     $w_point = (($width - $width_new)/2); 
     imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height); 
     imagecopyresampled($dst_img , $watermark , $w_xpos , $w_ypos , 0 , 0 , 200 , 20 , 200 , 20); 
    } 
    $image($dst_img, $dst_dir, $quality); 
    if($watermark)imagedestroy($watermark); 
    if($dst_img)imagedestroy($dst_img); 
    if($src_img)imagedestroy($src_img); 
}