php如何实现等比例压缩图片的代码
2023-10-25 本文已影响0人
Mracale
<?php
/**
* desription 压缩图片
* @param sting $imgsrc 图片路径
* @param string $imgdst 压缩后保存路径
*/
function compressedImage($imgsrc, $imgdst) {
list($width, $height, $type) = getimagesize($imgsrc);
$new_width = $width;//压缩后的图片宽
$new_height = $height;//压缩后的图片高
if($width >= 600){
$per = 600 / $width;//计算比例
$new_width = $width * $per;
$new_height = $height * $per;
}
switch ($type) {
case 1:
$giftype = check_gifcartoon($imgsrc);
if ($giftype) {
header('Content-Type:image/gif');
$image_wp = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromgif($imgsrc);
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
//90代表的是质量、压缩图片容量大小
imagejpeg($image_wp, $imgdst, 90);
imagedestroy($image_wp);
imagedestroy($image);
}
break;
case 2:
header('Content-Type:image/jpeg');
$image_wp = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg($imgsrc);
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
//90代表的是质量、压缩图片容量大小
imagejpeg($image_wp, $imgdst, 90);
imagedestroy($image_wp);
imagedestroy($image);
break;
case 3:
header('Content-Type:image/png');
$image_wp = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefrompng($imgsrc);
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
//90代表的是质量、压缩图片容量大小
imagejpeg($image_wp, $imgdst, 90);
imagedestroy($image_wp);
imagedestroy($image);
break;
}
}
$dir = "./avators";//根目录
$dir_one = scandir($dir);
foreach ($dir_one as $key => $value) {
if (in_array($value,['.','..'])) {
continue;
}
$dir_two = scandir($dir."/".$value);
foreach ($dir_two as $k2 => $v2) {
if (in_array($value,['.','..'])) {
continue;
}
$file = $dir."/".$value."/".$v2;
if (file_exists($file)) {
compressedImage($file,$file);
echo $file.'==';
}
}
}
echo 'success';
?>