导读:程序开发程序开发图片裁剪、缩放函数有很多,但是我推荐这两个.有点小修改. //图片裁剪、缩放函数 1. //$filepath图片路径,$percent缩放百分比 functi企业网站建设seo网站关键词优化。
图片裁剪、缩放函数有很多,但是我推荐这两个.建设网站公司有点小修改. //图片裁剪、缩放函数 1. //$filepath图片路径,$percent缩放百分比 function imagepress($filepath,$percent=0.5){ // 图片类型 header(Content-Type: image/jpeg); // 获得新的图片大小 list($width, $height) = getimagesize($filepath); $new_width = $width * $percent; $ […]
图片裁剪、缩放函数有很多,但是我推荐这两个.有点小修改.
//图片裁剪、缩放函数
1.
//$filepath图片路径,$percent缩放百分比
function imagepress($filepath,$percent='0.5'营销型网站建设){
// 图片类型
header('Content-Type: image/jpeg');
// 获得新的图片大小
list($width, $height) = getimagesize($filepath);
$new_width = $width * $percent;
$new_height = $height * $percent;
// 重新取样
$image_p = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg($filepath);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
// 输出
return imagejpeg($image_p, null, 100);
}
PHP图片大小裁剪、缩放函数原图:
PHP图片大小裁剪、缩放函数效果图:
2.
//$filepath图片路径,$new_width新的宽度,$new_height新的高度
function imagepress($filepath, $new_width, $new_height)
{
$source_info = getimagesize($filepath);
$source_width = $source_info[0];
$source_height = $source_info[1];
$source_mime = $source_info['mime'];
$source_ratio = $source_height / $source_width;
$target_ratio = $new_height / $new_width;
// 源图过高
if ($source_ratio > $target_ratio)
{
$cropped_width = $source_width;
$cropped_height 网站seo优化诊断工具= $source_width * $target_ratio;
$source_x = 0;
$source_y = ($source_height - $cropped_height) / 2;
}
// 源图过宽
elseif ($source_ratio < $target_ratio)
{
$cropped_width = $source_height / $target_ratio;
$cropped_height = $source_height;
$source_x = ($source_width - $cropped_width) / 2;
$source_y = 0;
}
// 源图适中
else
{
$cropped_width = $source_width;
$cropped_height = $source_height;
$source_x = 0;
$source_y = 0;
}
switch ($source_mime)
{
case 'image/gif':
$source_image = imagecreatefromgif($filepath);
break;
case 'image/jpeg':
$source_image = imagecreatefromjpeg($filepath);
break;
case 'image/png':
$source_image = imagecreatefrompng($filepath);
break;
default:
return false;
break;
}
$target_image = imagecreatetruecolor($new_width, $new_height);
$cropped_image = imagecreatetruecolor($cropped_width, $cropped_height);
// 裁剪
imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height);
// 缩放
imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $new_width, $new_height, $cropped_width, $cropped_height);
header('Content-Type: image/jpeg');
imagejpeg($target_image);
imagedestroy($source_image);
imagedestroy($target_image);
imagedestroy($cropped_image);
}
相关企业网站建设seo网站关键词优化。
关键词标签: 图片大小 缩放
声明: 本文由我的SEOUC技术文章主页发布于:2023-05-25 ，文章PHP图片大小裁剪imagecopy、缩放imagecopyresamp程序开主要讲述缩放,图片大小,PHP图片大小裁剪imagecopy、缩放i网站建设源码以及服务器配置搭建相关技术文章。转载请保留链接: https://www.seouc.com/article/web_8473.html
