php를 사용하여 이미지 크기를 조정하는 방법은 무엇입니까?

Question

이미지 데이터베이스에서 가져 와서 동일한 이름과 이미지로 다른 폴더의 이미지를 복사하고 150x150으로 크기를 조정합니다.

나는 이미지 모으기에 어떤 문제가 있는지 알지 못합니다.

여기 내 PHP 코드입니다.

$s=mysql_query("select * from photo_gallery where image_id = '".$image_id."'"); 
$r = mysql_fetch_array($s); 

echo $filename = 'user_data/'.$r['image_name']; 
$filname1 = explode("/",$filename); 

echo $filname1[0]; echo "<br>"; 
echo $filename = $filname1[1]; 

Answer 1

나는 이것이 도움이된다고 생각합니다.

   $path = getcwd(); 
      $oldpic = $path.'/user_data/'.$r['image_name']; 
      $array = explode("/",$oldpic); 
      $count = count($array); 
      $name = $array[$count-1]; 

      $src = $oldpic; 
      $dest = $path."/user_data/thumbnail/".$name; 

      //Genrating the image from there extension 
      $size = getimagesize($src); 
      switch($size["mime"]){ 

         case "image/jpeg": 
          $source_image = imagecreatefromjpeg($src); //jpeg file 
         break; 

         case "image/gif": 
          $source_image = imagecreatefromgif($src); //gif file 
         break; 

         case "image/png": 
          $source_image = imagecreatefrompng($src); //png file 
         break; 

         default: 
          $source_image=false; 
         break; 
      } 
      $width = imagesx($source_image); 
      $height = imagesy($source_image); 
      $newwidth=150; 
      $newheight=150; 
      $virtual_image = imagecreatetruecolor($newwidth, $newheight); 
      imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
      imagejpeg($virtual_image,$dest,100); 

이미지는 'user_data/thumbnail'폴더에 저장됩니다.

Answer 2

<?php 
function image_resize($imageName,$newName,$newWidth,$newHeight) 
{ 
     $imginfo = getimagesize($imageName); //get information about image 
     $type = $imginfo[2]; //third element of array is image type 
     if($type == IMAGETYPE_JPEG) { //if image is jpeg type 
     $image = imagecreatefromjpeg($imageName); 
     } elseif($type == IMAGETYPE_GIF) { // if image is gif type 
     $image = imagecreatefromgif($imageName); 
     } elseif($type == IMAGETYPE_PNG) { //if image is png type 
     $image = imagecreatefrompng($imageName); 
     } 
     $new_img = imagecreatetruecolor($newWidth, $newHeight); //create a new image 
     imagecopyresampled($new_img, $image, 0, 0, 0, 0, $newWidth, $newHeight, imagesx($image), imagesy($image)); 
     imagejpeg($new_img,$newName,75); //save the image as jpeg 
} 
//image_resize("original.jpg","output.jpg","150","150"); //how to use 
?> 

변화 아래 같은 PHP 코드 :이

$s=mysql_query("select * from photo_gallery where image_id = '".$image_id."'"); 
    $r = mysql_fetch_array($s); 

    $filename = 'user_data/'.$r['image_name']; 

    image_resize($filename,$filename."_thumbnail.jpg","150","150"); //how to use 

    echo 'orginial image is '.$filename.'<br> thumbnail is '.$filename."_thumbnail.jpg";