不用插件 WordPress图片自动加水印纯代码实现-荐爱小站

之前写过一篇 WordPress图片自动加水印插件汉化版（链接见文末），但如果你觉得安装 WordPress插件有点浪费资源，那么你也可以不用插件，而使用下面的方法手动创建一个文件代码来自动添加图片水印（其实和插件的原理是一样的）。

WordPress图片自动加水印纯代码

WordPress上传图片自动添加水印纯代码方法

第一步：在主题目录里面新建 class文件夹，然后把事先准备好的 image.php 文件放进去；

你可以新建一个名为 image.php的文件将下面的代码放进去保存，也可以下载我已准备好的 image.php文件直接使用；

点击展开查看代码

image.php文件中代码如下：

<?php
/**
* WordPress上传图片添加水印 By jianlove.com
*/
class image {
var $w_pct = 100;
var $w_quality = 80;
var $w_minwidth = 300;
var $w_minheight = 300;
var $w_path = '/data/watermark/';
var $watermark_enable;
public function __construct($watermark_enable = 0)
{
$this->watermark_enable = $watermark_enable;
}
public function set($w_img, $w_pos, $w_minwidth = 300, $w_minheight = 300, $w_quality = 80, $w_pct = 100)
{
$this->w_img = $w_img;
$this->w_pos = $w_pos;
$this->w_minwidth = $w_minwidth;
$this->w_minheight = $w_minheight;
$this->w_quality = $w_quality;
$this->w_pct = $w_pct;
}
public function info($img)
{
$imageinfo = getimagesize($img);
if($imageinfo === false) return false;
$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1));
$imagesize = filesize($img);
$info = array(
'width'=>$imageinfo[0],
'height'=>$imageinfo[1],
'type'=>$imagetype,
'size'=>$imagesize,
'mime'=>$imageinfo['mime']
);
return $info;
}
public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = 'watermark',$w_font = 8, $w_color = '#ff0000')
{
$source = ABSPATH.str_replace(home_url().'/', '', $source);
$w_pos = $w_pos ? $w_pos : $this->w_pos;
$w_img = $w_img ? $w_img : $this->w_img;
if(!$this->watermark_enable || !$this->check($source)) return false;
if(!$target) $target = $source;
$cache_w_img = THEME_FILES.$this->w_path.$w_img;
$source_info = getimagesize($source);
$source_w = $source_info[0];
$source_h = $source_info[1];
if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false;
switch($source_info[2]) {
case 1 :
$source_img = imagecreatefromgif($source);
break;
case 2 :
$source_img = imagecreatefromjpeg($source);
break;
case 3 :
$source_img = imagecreatefrompng($source);
break;
default :
return false;
}
if(!emptyempty($w_img) && file_exists($cache_w_img)) {
$ifwaterimage = 1;
$water_info = getimagesize($cache_w_img);
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2]) {
case 1 :
$water_img = imagecreatefromgif($cache_w_img);
break;
case 2 :
$water_img = imagecreatefromjpeg($cache_w_img);
break;
case 3 :
$water_img = imagecreatefrompng($cache_w_img);
break;
default :
return;
}
} else {
$ifwaterimage = 0;
$temp = imagettfbbox(ceil($w_font*2.5), 0, THEME_FILES.$this->w_path.'elephant.ttf', $w_text);
$width = $temp[2] - $temp[6];
$height = $temp[3] - $temp[7];
unset($temp);
}
switch($w_pos) {
case 1:
$wx = 5;
$wy = 5;
break;
case 2:
$wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3:
$wx = $source_w - $width;
$wy = 0;
break;
case 4:
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5:
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6:
$wx = $source_w - $width;
$wy = ($source_h - $height) / 2;
break;
case 7:
$wx = 0;
$wy = $source_h - $height;
break;
case 8:
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 9:
$wx = $source_w - $width;
$wy = $source_h - $height;
break;
case 10:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
default:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
}
if($ifwaterimage) {
if($water_info[2] == 3) {
imagecopy($source_img, $water_img, $wx, $wy, 0, 0, $width, $height);
} else {
imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
}
} else {
if(!emptyempty($w_color) && (strlen($w_color)==7)) {
$r = hexdec(substr($w_color,1,2));
$g = hexdec(substr($w_color,3,2));
$b = hexdec(substr($w_color,5));
} else {
return;
}
imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));
}
switch($source_info[2]) {
case 1 :
imagegif($source_img, $target);
break;
case 2 :
imagejpeg($source_img, $target, $this->w_quality);
break;
case 3 :
imagepng($source_img, $target);
break;
default :
return;
}
if(isset($water_info)) {
unset($water_info);
}
if(isset($water_img)) {
imagedestroy($water_img);
}
unset($source_info);
imagedestroy($source_img);
return true;
}
private function check($image)
{
return extension_loaded('gd') && preg_match("/\.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));
}
}

直接下载：

下载地址：image.zip （百度网盘提取码：d6sb）

第二步：打开当前主题的 functions.php 文件，添加下面的代码：

/**
* WordPress上传图片添加水印 By jianlove.com
*/
function uimoban_watermark($attachment_ID)
{
$attachment = get_post($attachment_ID);
switch($attachment->post_mime_type){
case 'image/jpeg':
case 'image/png':
case 'image/gif':
require THEME_FILES . '/class/image.php';
$image = new image(true);
$image->set('watermark.png', 1);
$image->watermark($attachment->guid);
break;
default:return ;
}
}
add_action('add_attachment', 'uimoban_watermark');

注意：第13行中 watermark.png指定的是水印图片，和第一步代码中的 watermark.png应该保持一致，当然你也可以自行修改。“1”代表水印位置。

至此你就实现了不用插件还能自动给 WordPress上传的图片添加水印的功能。

如果你不想这么麻烦，当然也有简单后台直接安装插件的方法：多功能 WordPress 图片水印插件：image-watermark（汉化版）

标签：wordpress代码 wordpress优化

转载请注明链接地址：荐爱小站 » 不用插件 WordPress图片自动加水印纯代码实现

不用插件 WordPress图片自动加水印纯代码实现

WordPress上传图片自动添加水印纯代码方法

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