php代码<?php
function thumbs($FileName,$SaveTo,$SetW,$SetH){
$IMGInfo= getimagesize($FileName);
if(!$IMGInfo) return false;
if($IMGInfo[mime]== "image/pjpeg" || $IMGInfo[mime]=="image/jpeg"){
$ThisPhoto= imagecreatefromjpeg($FileName);
}elseif($IMGInfo[mime]== "image/x-png" || $IMGInfo[mime]== "image/png"){
$ThisPhoto= imagecreatefrompng($FileName);
}elseif($IMGInfo[mime]== "image/gif"){
$ThisPhoto=imagecreatefromgif($FileName);
}
$width=$IMGInfo[0];
$height=$IMGInfo[1];
$scalc = max($width/$SetW,$height/$SetH);
$nw = intval($width/$scalc);
$nh = intval($height/$scalc);
echo "缩略大小:w$nw,h$nh <br />";
if($SetW-$nw == 1){$nw = $SetW;}
if($SetH-$nh == 1){$nh = $SetH;}
echo "+修正1像素: w$nw,h$nh<br />";
//补宽
if($SetW-$nw > 0){
$nh = $nh +(($nh/$nw) * ($SetW-$nw));
echo "*需补宽".($SetW-$nw).",陪补高".(($nh/$nw) * ($SetW-$nw))." <br />";
$nw = $SetW;
}
//补高
if($SetH-$nh > 0){
$nw = $nw + (($nw/$nh) * ($SetH-$nh));
echo "*需补高".($SetH-$nh).",陪补宽". (($nw/$nh) * ($SetH-$nh)) ."<br />";
$nh = $SetH;
}
$nw = intval($nw);
$nh = intval($nh);
echo "+修正大小:w$nw,h$nh<br />";
$px = ($SetW - $nw)/2;
$py = ($SetH - $nh)/2;
echo "窗口大小:w$SetW,h$SetH <br />";
echo "+偏移修正:x$px,y$py <br />";
$NewPhoto=imagecreatetruecolor($SetW,$SetH);
imagecopyresized($NewPhoto,$ThisPhoto,$px,$py,0,0,$nw,$nh,$width,$height);
ImageJpeg ($NewPhoto,$SaveTo);
return true;
}
thumbs('a.jpg','newa.jpg',150,70);
?>
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