PHP实现图片裁剪、添加水印效果代码,
3、PHP对图像的裁剪
<div> <h4 id="裁剪之前">裁剪之前</h4> <img src="/static/imghwm/default1.png" data-src="1.png" class="lazy" style="max-width:90%" alt="PHP实现图片裁剪、添加水印效果代码," > </div> <?php header("content-type","text/html;charset=utf-8"); /* *图片裁剪 *@param string $filename 图片的url *@param int $width 图片裁剪宽度 *@param int $height 图片裁剪高度 *@param int $x 裁剪图片左边开始的位置 *@param int $y 裁剪图片顶边开始的位置 */ function cut($filename,$x,$y,$width,$height) { /*获取图像资源,需要裁剪的图片*/ $image = imagecreatefrompng($filename); /*以新的大小创建画布,保存裁剪后的图片*/ $image_p = imagecreatetruecolor($width, $height); /*使用imagecopyresampled缩放*/ imagecopyresampled($image_p, $image, 0, 0, $x, $y, $width, $height, $width, $height); /*保存裁剪后的图片和命名*/ imagepng($image_p,'test1.png'); /*释放资源*/ imagedestroy($image_p); imagedestroy($image); } /*调用函数*/ cut('1.png',20,20,80,80); ?> <div> <h4 id="裁剪之后">裁剪之后</h4> <img src="/static/imghwm/default1.png" data-src="test1.png" class="lazy" style="max-width:90%" alt="PHP实现图片裁剪、添加水印效果代码," > </div>
效果
4、PHP为图像添加水印
<div> <h4 id="没有水印">没有水印</h4> <img src="/static/imghwm/default1.png" data-src="1.png" class="lazy" style="max-width:90%" alt="PHP实现图片裁剪、添加水印效果代码," > </div> <?php header("content-type","text/html;charset=utf-8"); /* *给背景图片添加水印,背景图片格式png,水印格式gif *@param string $filename 图片的url *@param string $water 水印图片 */ function watermark($filename,$water) { /*获取原图的大小*/ list($b_w,$b_h) = getimagesize($filename); /*获取水印图片的大小*/ list($w_w,$w_h) = getimagesize($water); /*在背景图片中放水印图片的随机起始位置*/ $posX =rand(0,($b_w - $w_w)); $posY =rand(0,($b_h - $w_h)); /*获取图像资源,需要裁剪的图片*/ $back = imagecreatefrompng($filename); $water = imagecreatefromgif($water); /*使用Inagecopy函数复制水印图片到指定位置*/ imagecopy($back, $water, $posX, $posY, 0, 0, $w_w, $w_h); /*保存带水印的图片和命名*/ imagepng($back,'test2.png'); /*释放资源*/ imagedestroy($back); imagedestroy($water); } /*调用函数*/ watermark('1.png','test.gif'); ?> <div> <h4 id="加上水印">加上水印</h4> <img src="/static/imghwm/default1.png" data-src="test2.png" class="lazy" style="max-width:90%" alt="PHP实现图片裁剪、添加水印效果代码," > </div>
效果
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