thinkPHP框架实现图像裁剪、缩放、加水印的方法

/** * 图像的裁剪、缩放、加水印 * @param string $path 路径 * @param int $width 裁剪的宽度/限制的高度或宽度，当有$height值时此值为图片的宽度，否则为限制的宽度或高度 * @param int $height [可选]裁剪的高度 * @param boolean $water [可选]是否加水印 * @param int $word [可选]水印文字 */ function zoom_image($path,$width = 300,$height = null,$water = null,$word = 'water'){ $image = new thinkimage(); $image->open($path); $imgwidth = $image->width(); $imgheight = $image->height(); // 限制尺寸 if($width and !$height){ $maxsize = $width; // 宽度或高度大于规定尺寸时 if($imgwidth > $maxsize or $imgheight > $maxsize){ $size = image_min_width($imgwidth,$imgheight,$maxsize); $image->thumb($size['width'], $size['height']); $do = true; $dowater = true; } // 裁剪固定尺寸 }else if($width and $height){ $size = image_min_width($imgwidth,$imgheight,$width); $image->thumb($size['width'], $size['height'])->crop($width, $height); $do = true; $dowater = true; } if($dowater and $water and $word){ $image->text($word,'./public/images/arial.ttf',20,'#dddddd', thinkimage::image_water_southeast,-10); } // 未操作则不保存 if($do){ $image->save($path); } }