調整大小和裁剪圖像

Question

我想調整大小和裁剪圖像。 250x250的

我可以調整它的大小：

$newfilename = "image.jpg"; 
    if(isset($_POST['submit'])){ 
     if (isset ($_FILES['new_image'])){ 
      $imagename = $newfilename; 
      $source = $_FILES['new_image']['tmp_name']; 
      $target = "img/".$imagename; 
      move_uploaded_file($source, $target); 

      $imagepath = $imagename; 
      $save = "img/" . $imagepath; 
      $file = "img/" . $imagepath; 

      list($width, $height) = getimagesize($file) ; 


      $modwidth = 250; 

      $diff = $width/$modwidth; 

      $modheight = $height/$diff; 
      $tn = imagecreatetruecolor($modwidth, $modheight) ; 
      $image = imagecreatefromjpeg($file) ; 
      imagecopyresized($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 

      imagejpeg($tn, $save, 100) ; 

     } 
    } 

但我不知道該怎麼調整後裁剪。 它裁剪圖像。如果我有像10000x10000這是錯誤的決定

imagecopyresized($tn, $image, 0, 0, 0, 0, 250, 250, 250, 250) ; 

Answer 1

您可以簡單地使用PHP來獲取圖像和HTML呼應他們和特定寬度/高度適用於他們。

Answer 2

使用imagecreatetruecolor創建指定裁剪尺寸的新圖像，然後使用imagecopy將其從舊版複製到新版畫布。

實施例（未測試）：

$newfilename = "image.jpg"; 
if(isset($_POST['submit'])){ 
    if (isset ($_FILES['new_image'])){ 
     $imagename = $newfilename; 
     $source = $_FILES['new_image']['tmp_name']; 
     $target = "img/".$imagename; 
     move_uploaded_file($source, $target); 

     $imagepath = $imagename; 
     $save = "img/" . $imagepath; 
     $file = "img/" . $imagepath; 

     list($width, $height) = getimagesize($file) ; 


     $modwidth = 250; 

     $diff = $width/$modwidth; 

     $modheight = $height/$diff; 
     $tn = imagecreatetruecolor($modwidth, $modheight) ; 
     $cropped = imagecreatetruecolor(250, 250); 
     $cropLeft = 0; // start from left 
     $cropTop = 0; // start from top 

     $image = imagecreatefromjpeg($file) ; 
     imagecopyresized($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
     imagecopy($cropped, $image, 0, 0, $cropLeft, $cropTop, $modwidth, $modheight); 

     imagejpeg($cropped, $save, 100); // save cropped image 
     // imagejpeg($tn, $save, 100) ; // save resized image 

    } 
} 

Answer 3

嘗試使用croppie。 Github的網址是http://foliotek.github.io/Croppie/ 我已經使用它，它的工作原理很好