CONVERT(date, CONVERT(datetime,DocDate))我想上传<input type='file' id='inpfile' accept="image/jpeg, image/png, image/gif" hidden>
张图片，最大宽度jpg, png, gif并使用新数据更新数据库。
PHP
960px似乎有效，但有两个问题：
$file = $_FILES['inpfile'];
$filename = $file['name'];
$tempname = $file['tmp_name'];
$arr = explode('.', $filename);
$ext = strtolower(end($arr));
$info = getimagesize($tempname);
$origw = $info[0];
$origh = $info[1];
$mime = $info['mime'];
if ($mime !== 'image/jpeg' and $mime !== 'image/png' and $mime !== 'image/gif') {
echo "ONLY JPG-PNG-GIF ALLOWED !";
exit();
}
if ($mime == 'image/jpeg') {$newimg = imagecreatefromjpeg($tempname);}
elseif ($mime == 'image/png') {$newimg = imagecreatefrompng($tempname);}
elseif ($mime == 'image/gif') {$newimg = imagecreatefromgif($tempname);}
if ($origw <= 960) {
$uniq = uniqid() . "." . $ext;
$targ = '../images/' . $uniq;
move_uploaded_file($tempname, $targ);
}
else {
$finalimg = imagescale($newimg, 960, -1, IMG_BICUBIC);
$uniq = uniqid() . "." . $ext;
$targ = '../images/' . $uniq;
if ($mime == 'image/jpeg') {imagejpeg($finalimg, $targ);}
elseif ($mime == 'image/png') {imagepng($finalimg, $targ);}
elseif ($mime == 'image/gif') {imagegif($finalimg, $targ);}
}
list($w, $h) = getimagesize($targ);
$st = $db->query("insert into images (fname, width, height) values('" . $uniq . "', " . $w . ", " . $h . ")");
我试过了：
If omitted or negative, the aspect ratio will be preserved.最终图片为$finalimg = imagescale($newimg, 960, IMG_BICUBIC);
！
答案 0 :(得分：1)
有更短的方法吗？
说到GD /图像功能：我不这么认为。但是，您可以简化pr_lm <- partial(lm, formula = Sepal.Length ~ Sepal.Width)
get_rsquared <- compose(as_mapper("r.squared"), summary, pr_lm)
iris_n %>%
mutate(lm = map_dbl(data, get_rsquared))
# A tibble: 3 x 3
Species data lm
<fct> <list> <dbl>
1 setosa <tibble [50 × 4]> 0.551
2 versicolor <tibble [50 × 4]> 0.277
3 virginica <tibble [50 × 4]> 0.209
内容以确定图像类型。
imagescale（新高度）的文档说： 如果省略或为负，则将保留纵横比。
传递第四个参数（if/else）时，不能省略第三个参数（$new_height)。如果要设置模式，还需要设置高度。所以这样做像这样：
$mode