水印上传图像没有调整大小图像宽度高度

Question

所以我的下面的代码工作就像如果我上传图像它将调整图像大小为720x450然后水印它。但我不希望修改宽度和高度，并将水印放在任何尺寸的图像的右下角

如果有人可以帮我在这里？

$image_path = "../images/watermark.png"; 
function watermark_image($oldimage_name, $new_image_name){ 
    global $image_path; 
    list($owidth,$oheight) = getimagesize($oldimage_name); 
    $width = 720; $height = 450;  
    $im = imagecreatetruecolor($width, $height); 
    $img_src = imagecreatefromjpeg($oldimage_name); 
    imagecopyresampled($im, $img_src, 0, 0, 0, 0, $width, $height, $owidth, $oheight); 
    $watermark = imagecreatefrompng($image_path); 
    list($w_width, $w_height) = getimagesize($image_path);   
    $pos_x = $width - $w_width; 
    $pos_y = $height - $w_height; 
    imagecopy($im, $watermark, $pos_x, $pos_y, 0, 0, $w_width, $w_height); 
    imagejpeg($im, $new_image_name, 90); 
    imagedestroy($im); 
    unlink($oldimage_name); 
    return true; 
} 

感谢您的帮助和时间。

Answer 1

您提供手动高度和宽度，只需指定图像

$image_path = "../images/watermark.png"; 
function watermark_image($oldimage_name, $new_image_name){ 
    global $image_path; 
    list($owidth,$oheight) = getimagesize($oldimage_name); 
    $width = $owidth; $height = $oheight;  
    $im = imagecreatetruecolor($width, $height); 
    $img_src = imagecreatefromjpeg($oldimage_name); 
    imagecopyresampled($im, $img_src, 0, 0, 0, 0, $width, $height, $owidth, $oheight); 
    $watermark = imagecreatefrompng($image_path); 
    list($w_width, $w_height) = getimagesize($image_path);   
    $pos_x = $width - $w_width; 
    $pos_y = $height - $w_height; 
    imagecopy($im, $watermark, $pos_x, $pos_y, 0, 0, $w_width, $w_height); 
    imagejpeg($im, $new_image_name, 90); 
    imagedestroy($im); 
    unlink($oldimage_name); 
    return true; 
} 

的原始高度ANS宽度试试这个，你会正常运行。

更多信息点击这里http://php.net/manual/en/image.examples-watermark.php