Wie Wasserzeichen automatisch mit Wasserzeichen versehen werden

Question

Ich möchte Wasserzeichen zu meinen Benutzerbildern Pfosten automatisch hinzufügen.

Ich habe unten Code bereits getan, aber die Bilder werden leer mit Wasserzeichen.

Blank Image: https://drk3g4xn3fsso.cloudfront.net/1503319365_b6ffc731d32b4abc1503319361869.jpg

<?php 

function resizeimage($img,$size){ 
    $width=$size[0]; 
    $height=$size[1]; 
    $newwidth = 640; 
    $newheight = $height*($newwidth/$width); 
    $tci = imagecreatetruecolor($newwidth, $newheight); 
    imagecopyresampled($tci, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
    return $tci; 
} 

function startsWith($haystack, $needle) 
    { 
     $length = strlen($needle); 
     return (substr($haystack, 0, $length) === $needle); 
    } 

function compress($source, $destination, $quality,$add_watermark=FALSE) { 

    $info = getimagesize($source); 

    if ($info['mime'] == 'image/jpeg') 
     $image = imagecreatefromjpeg($source); 

    elseif ($info['mime'] == 'image/gif') 
     $image = imagecreatefromgif($source); 

    elseif ($info['mime'] == 'image/png') 
     $image = imagecreatefrompng($source); 

    $image=resizeimage($image,$info); 

    if ($add_watermark){ 
     $watermark=imagecreatefrompng("watermark.png"); 
     $infoWatermark=getimagesize("watermark.png"); 
     $imageWidth=$info[0]; 
     $imageHeight=$info[1]; 
     $watermarkWidth=$infoWatermark[0]; 
     $watermarkHeight=$infoWatermark[1]; 

     //imagecopyresampled($image,$watermark,20,20,0,0,$watermarkWidth,$watermarkHeight,$watermarkWidth,$watermarkHeight); 
     imagecopy($image,$watermark,20,20,0,0,$watermarkWidth,$watermarkHeight); 
    } 

    imagejpeg($image, $destination, $quality); 

    return $destination; 
} 

Ich frage mich nur, was ich falsch gemacht habe, um es nicht mit dem hochgeladenen Bild funktioniert?

danke.

Answer 1

Hallo hier ist die Demo, um Bild mit Wasserzeichen zu erzeugen.

Ordnerstruktur:

Demo

• upload/sample.jpg
• index.php
• watermark.png

Hinweis: watermark.jpg ist das Bild, das Sie verwenden als Wasserzeichen auf sample.jpg Bild.

Hier ist der index.php-Code.

<?php 

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)) 
     { 

      //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($new_canvas,'uploads/'.$image_name , 90); 

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

?> 
<!DOCTYPE HTML> 
<html> 
<head> 
<style type="text/css"> 
#upload-form { 
    padding: 20px; 
    background: #F7F7F7; 
    border: 1px solid #CCC; 
    margin-left: auto; 
    margin-right: auto; 
    width: 400px; 
} 
#upload-form input[type=file] { 
    border: 1px solid #ddd; 
    padding: 4px; 
} 
#upload-form input[type=submit] { 
    height: 30px; 
} 
</style> 
</head> 
<body> 

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

</body> 
</html>