Question

有人知道这段代码有什么问题吗？它不是给我一个实际的图像，而是给我一个图像错误。我想我正确地设置了所有功能和一切。任何建议都很棒。

<?php
function resizeImage($filename, $max_width, $max_height) {
  list($orig_width, $orig_height) = getimagesize($filename);

  $width = $orig_width;
  $height = $orig_height;

  # taller
  if ($height > $max_height) {
    $width = ($max_height / $height) * $width;
    $height = $max_height;
  }

  # wider
  if ($width > $max_width) {
    $height = ($max_width / $width) * $height;
    $width = $max_width;
  }

  $image_p = imagecreatetruecolor($width, $height);

  $image = imagecreatefromjpeg($filename);

  imagecopyresampled($image_p, $image, 0, 0, 0, 0, 
                     $width, $height, $orig_width, $orig_height);

  return $image_p;
}

$directory = "uploads/";
$images = glob($directory."*");

foreach($images as $image) {

  // Set a maximum height and width
  $width = 200;
  $height = 200;
  $newImage = resizeImage($image, $width, $height);

  echo '<img src="'.$newImage.'" /><br />';
}      
?>

Answer 1

如果您不想保存图像，则可以使用以下代码。

<?php
    function resizeImage($filename, $max_width, $max_height) {
        list($orig_width, $orig_height) = getimagesize($filename);

        $width = $orig_width;
        $height = $orig_height;

        # taller
        if ($height > $max_height) {
            $width = ($max_height / $height) * $width;
            $height = $max_height;
        }

        # wider
        if ($width > $max_width) {
            $height = ($max_width / $width) * $height;
            $width = $max_width;
        }

        $image_p = imagecreatetruecolor($width, $height);
        $image = imagecreatefromjpeg($filename);
        imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $orig_width, $orig_height);
        ob_start();
        imagejpeg($image_p); 
        $imgSrc = 'data:image/jpeg;base64,'.base64_encode(ob_get_clean());
        return $imgSrc;
    }

    $directory = "uploads/";
    $images = glob($directory."*");

    foreach($images as $image) {
        // Set a maximum height and width
        $width = 200;
        $height = 200;
        $imgSrc = resizeImage($image, $width, $height);
        echo '<img src="'.$imgSrc.'" /><br />';
    }      
?>

如果你想保存图像，那么你必须创建一些其他文件夹，如resized，并在那里保存裁剪的图像并将其链接如下所示。（不要更改旧代码并添加此）

<?php    
    $directory = "uploads/";
    $images = glob($directory."*");

    $i=1;//added
    foreach($images as $image) {
       // Set a maximum height and width
        $width = 200;
        $height = 200;
        $newImage = resizeImage($image, $width, $height);
        imagejpeg($newImage,"resized/newimage".$i.".jpg");  //added
        echo '<img src="resized/newimage'.$i.'.jpg" /><br />';//modified
        $i++;//added
    }      
?>

尝试使用PHP调整图像大小

1 个答案: