PHP实现图片不变型裁剪及图片按比例裁剪的方法
发布时间：2020-12-12 21:17:55 所属栏目：PHP教程 来源：网络整理
导读：本篇章节讲解PHP实现图片不变型裁剪及图片按比例裁剪的方法。供大家参考研究具体如下： 图片不变型裁剪 $target_ratio){ // image-to-height $cropped_width = $source_width; $cropped_height = $source_width * $target_ratio; $source_x = 0; $
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本篇章节讲解PHP实现图片不变型裁剪及图片按比例裁剪的方法。分享给大家供大家参考，具体如下： 图片不变型裁剪 $target_ratio){
// image-to-height
$cropped_width = $source_width;
$cropped_height = $source_width * $target_ratio;
$source_x = 0;
$source_y = ($source_height - $cropped_height) / 2;
}elseif ($source_ratio < $target_ratio){
//image-to-widht
$cropped_width = $source_height / $target_ratio;
$cropped_height = $source_height;
$source_x = ($source_width - $cropped_width) / 2;
$source_y = 0;
}else{
//image-size-ok
$cropped_width = $source_width;
$cropped_height = $source_height;
$source_x = 0;
$source_y = 0;
}
switch ($source_mime){
case 'image/gif':
$source_image = imagecreatefromgif($source_path);
break;
case 'image/jpeg':
$source_image = imagecreatefromjpeg($source_path);
break;
case 'image/png':
$source_image = imagecreatefrompng($source_path);
break;
default:
return ;
break;
}
$target_image = imagecreatetruecolor($target_width,$target_height);
$cropped_image = imagecreatetruecolor($cropped_width,$cropped_height);
// copy
imagecopy($cropped_image,$source_image,$source_x,$source_y,$cropped_width,$cropped_height);
// zoom
imagecopyresampled($target_image,$cropped_image,$target_height,$cropped_height);
header('Content-Type: image/jpeg');
imagejpeg($target_image);
imagedestroy($source_image);
imagedestroy($target_image);
imagedestroy($cropped_image);
}
$filename = "8fcb7a0831b79c61.jpg";
imageCropper($filename,200,200);
?>
图片按比例裁剪希望本文所述对大家PHP程序设计有所帮助。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |