php图片上传类同时可生成缩略图与加水印
这款图片上传代码可以把上传的图片增加水印,生成小图片,同时还可以生成文字水印,php图片上传类同时可生成缩略图与加水印实例代码如下:
<?php
class upimages {
var $annexfolder = "upload"; //附件存放点,默认为:annex
var $smallfolder = "small"; //缩略图存放路径,注:必须是放在 $annexfolder下的子目录,默认为:smallimg
var $markfolder = "mark"; //水印图片存放处
var $upfiletype = "jpg gif png"; //上传的类型,默认为:jpg gif png rar zip
var $upfilemax = 1024; //上传大小限制,单位是"kb",默认为:1024kb
var $fonttype; //字体
var $maxwidth = 500; //图片最大宽度
var $maxheight = 600; //图片最大高度
function upimages($annexfolder, $smallfolder, $includefolder) {
$this->annexfolder = $annexfolder;
$this->smallfolder = $smallfolder;
$this->fonttype = $includefolder . "/04b_08__.ttf";
}
function upload($inputname) {
$imagename = time(); //设定当前时间为图片名称
if (@emptyempty($_files[$inputname]["name"])) die("没有上传图片信息,请确认");
$name = explode(".", $_files[$inputname]["name"]); //将上传前的文件以"."分开取得文件类型
$imgcount = count($name); //获得截取的数量
$imgtype = $name[$imgcount - 1]; //取得文件的类型
if (strpos($this->upfiletype, $imgtype) === false) die(error("上传文件类型仅支持 " . $this->upfiletype . " 不支持 " . $imgtype));
$photo = $imagename . "." . $imgtype; //写入数据库教程的文件名
$uploadfile = $this->annexfolder . "/" . $photo; //上传后的文件名称
$upfileok = move_uploaded_file($_files[$inputname]["tmp_name"], $uploadfile);
if ($upfileok) {
$imgsize = $_files[$inputname]["size"];
$ksize = round($imgsize / 1024);
if ($ksize > ($this->upfilemax * 1024)) {
@unlink($uploadfile);
die(error("上传文件超过 " . $this->upfilemax . "kb"));
}
} else {
die(error("上传图片失败,请确认你的上传文件不超过 $upfilemax kb 或上传时间超时"));
}
return $photo;
}
function getinfo($photo) {
$photo = $this->annexfolder . "/" . $photo;
$imageinfo = getimagesize($photo);
$imginfo["width"] = $imageinfo[0];
$imginfo["height"] = $imageinfo[1];
$imginfo["type"] = $imageinfo[2];
$imginfo["name"] = basename($photo);
return $imginfo;
}
function smallimg($photo, $width = 128, $height = 128) {
$imginfo = $this->getinfo($photo);
$photo = $this->annexfolder . "/" . $photo; //获得图片源
$newname = substr($imginfo["name"], 0, strrpos($imginfo["name"], ".")) . "_thumb.jpg"; //新图片名称
if ($imginfo["type"] == 1) {
$img = imagecreatefromgif($photo);
} elseif ($imginfo["type"] == 2) {
$img = imagecreatefromjpeg($photo);
} elseif ($imginfo["type"] == 3) {
$img = imagecreatefrompng($photo);
} else {
$img = "";
}
if (emptyempty($img)) return false;
$width = ($width > $imginfo["width"]) ? $imginfo["width"] : $width;
$height = ($height > $imginfo["height"]) ? $imginfo["height"] : $height;
$srcw = $imginfo["width"];
$srch = $imginfo["height"];
if ($srcw * $width > $srch * $height) {
$height = round($srch * $width / $srcw);
} else {
$width = round($srcw * $height / $srch);
}
if (function_exists("imagecreatetruecolor")) {
$newimg = imagecreatetruecolor($width, $height);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
} else {
$newimg = imagecreate($width, $height);
imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
}
if ($this->tofile) {
if (file_exists($this->annexfolder . "/" . $this->smallfolder . "/" . $newname)) @unlink($this->annexfolder . "/" . $this->smallfolder . "/" . $newname);
imagejpeg($newimg, $this->annexfolder . "/" . $this->smallfolder . "/" . $newname);
return $this->annexfolder . "/" . $this->smallfolder . "/" . $newname;
} else {
imagejpeg($newimg);
}
imagedestroy($newimg);
imagedestroy($img);
return $newname;
}
function watermark($photo, $text) {
$imginfo = $this->getinfo($photo);
$photo = $this->annexfolder . "/" . $photo;
$newname = substr($imginfo["name"], 0, strrpos($imginfo["name"], ".")) . "_mark.jpg";
switch ($imginfo["type"]) {
case 1:
$img = imagecreatefromgif($photo);
break;
case 2:
$img = imagecreatefromjpeg($photo);
break;
case 3:
$img = imagecreatefrompng($photo);
break;
default:
return false;
}
if (emptyempty($img)) return false;
$width = ($this->maxwidth > $imginfo["width"]) ? $imginfo["width"] : $this->maxwidth;
$height = ($this->maxheight > $imginfo["height"]) ? $imginfo["height"] : $this->maxheight;
$srcw = $imginfo["width"];
$srch = $imginfo["height"];
if ($srcw * $width > $srch * $height) {
$height = round($srch * $width / $srcw);
} else {
$width = round($srcw * $height / $srch);
}
if (function_exists("imagecreatetruecolor")) {
$newimg = imagecreatetruecolor($width, $height);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
} else {
$newimg = imagecreate($width, $height);
imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
}
$white = imagecolorallocate($newimg, 255, 255, 255);
$black = imagecolorallocate($newimg, 0, 0, 0);
$alpha = imagecolorallocatealpha($newimg, 230, 230, 230, 40);
imagefilledrectangle($newimg, 0, $height - 26, $width, $height, $alpha);
imagefilledrectangle($newimg, 13, $height - 20, 15, $height - 7, $black);
imagettftext($newimg, 4.9, 0, 20, $height - 14, $black, $this->fonttype, $text[0]);
imagettftext($newimg, 4.9, 0, 20, $height - 6, $black, $this->fonttype, $text[1]);
if ($this->tofile) {
if (file_exists($this->annexfolder . "/" . $this->markfolder . "/" . $newname)) @unlink($this->annexfolder . "/" . $this->markfolder . "/" . $newname);
imagejpeg($newimg, $this->annexfolder . "/" . $this->markfolder . "/" . $newname);
return $this->annexfolder . "/" . $this->markfolder . "/" . $newname;
} else {
imagejpeg($newimg);
}
imagedestroy($newimg);
imagedestroy($img);
return $newname;
}
}永久地址:http://www.phprm.com/tuxiang/fs4484.html
转载随意~请带上教程地址吧^^