非常强大的php图片处理类，可以自定义图片水印、透明度、图片缩放、图片锐化、图片旋转、图片翻转、图片剪切、图片反色。
 * 图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色
* 处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步
具体代码如下：
'没有找到相关图片!' ); /** * 构造函数：函数初始化 */ function __construct($picture_url){ $this -> get_info($picture_url); } function get_info($picture_url){ /** * 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息 */ @$size = getimagesize($picture_url); if(!$size){ exit($this -> error['unalviable']); } // 得到原图片的信息类型、宽度、高度 $this -> picture_mime = $size['mime']; $this -> picture_width = $size[0]; $this -> picture_height = $size[1]; // 创建图片 switch($size[2]){ case 1: $this -> picture_create = imagecreatefromgif($picture_url); $this -> picture_type = imagejpeg; $this -> picture_ext = jpg; break; case 2: $this -> picture_create = imagecreatefromjpeg($picture_url); $this -> picture_type = imagegif; $this -> picture_ext = gif; break; case 3: $this -> picture_create = imagecreatefrompng($picture_url); $this -> picture_type = imagepng; $this -> picture_ext = png; break; } /** * 文字颜色转换16进制转换成10进制 */ preg_match_all(/([0-f]){2,2}/i, $this -> font_color, $matches); if(count($matches) == 3){ $this -> red = hexdec($matches[0][0]); $this -> green = hexdec($matches[0][1]); $this -> blue = hexdec($matches[0][2]); } } # end of __construct /** * 将16进制的颜色转换成10进制的（r，g，b） */ function hex2dec(){ preg_match_all(/([0-f]){2,2}/i, $this -> font_color, $matches); if(count($matches) == 3){ $this -> red = hexdec($matches[0][0]); $this -> green = hexdec($matches[0][1]); $this -> blue = hexdec($matches[0][2]); } } // 缩放类型 function zoom_type($zoom_type){ $this -> zoom = $zoom_type; } // 对图片进行缩放,如果不指定高度和宽度就进行缩放 function zoom(){ // 缩放的大小 if($this -> zoom == 0){ $this -> zoom_width = $this -> picture_width * $this -> zoom_multiple; $this -> zoom_height = $this -> picture_height * $this -> zoom_multiple; } // 新建一个真彩图象 $this -> true_color = imagecreatetruecolor($this -> zoom_width, $this -> zoom_height); $white = imagecolorallocate($this -> true_color, 255, 255, 255); imagefilledrectangle($this -> true_color, 0, 0, $this -> zoom_width, $this -> zoom_height, $white); imagecopyresized($this -> true_color, $this -> picture_create, 0, 0, 0, 0, $this -> zoom_width, $this -> zoom_height, $this -> picture_width, $this -> picture_height); } # end of zoom // 裁切图片,按坐标或自动 function cut(){ $this -> true_color = imagecreatetruecolor($this -> cut_width, $this -> cut_width); imagecopy($this -> true_color, $this -> picture_create, 0, 0, $this -> cut_x, $this -> cut_y, $this -> cut_width, $this -> cut_height); } # end of cut /** * 在图片上放文字或图片 * 水印文字 */ function _mark_text(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); $this -> word = mb_convert_encoding($this -> font_word, 'utf-8', 'gb2312'); /** * 取得使用 truetype 字体的文本的范围 */ $temp = imagettfbbox($this -> font_size, 0, $this -> font_path, $this -> word); $word_length = strlen($this -> word); $word_width = $temp[2] - $temp[6]; $word_height = $temp[3] - $temp[7]; /** * 文字水印的默认位置为右下角 */ if($this -> word_x == ){ $this -> word_x = $this -> picture_width - $word_width; } if($this -> word_y == ){ $this -> word_y = $this -> picture_height - $word_height; } imagesettile($this -> true_color, $this -> picture_create); imagefilledrectangle($this -> true_color, 0, 0, $this -> picture_width, $this -> picture_height, img_color_tiled); $text2 = imagecolorallocate($this -> true_color, $this -> red, $this -> green, $this -> blue); imagettftext($this -> true_color, $this -> font_size, $this -> angle, $this -> word_x, $this -> word_y, $text2, $this -> font_path, $this -> word); } /** * 水印图片 */ function _mark_picture(){ /** * 获取水印图片的信息 */ @$size = getimagesize($this -> force_url); if(!$size){ exit($this -> error['unalviable']); } $force_picture_width = $size[0]; $force_picture_height = $size[1]; // 创建水印图片 switch($size[2]){ case 1: $force_picture_create = imagecreatefromgif($this -> force_url); $force_picture_type = gif; break; case 2: $force_picture_create = imagecreatefromjpeg($this -> force_url); $force_picture_type = jpg; break; case 3: $force_picture_create = imagecreatefrompng($this -> force_url); $force_picture_type = png; break; } /** * 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。 */ $this -> new_picture = $this -> picture_create; if($force_picture_width > $this -> picture_width){ $create_width = $force_picture_width - $this -> force_start_x; }else{ $create_width = $this -> picture_width; } if($force_picture_height > $this -> picture_height){ $create_height = $force_picture_height - $this -> force_start_y; }else{ $create_height = $this -> picture_height; } /** * 创建一个画布 */ $new_picture_create = imagecreatetruecolor($create_width, $create_height); $white = imagecolorallocate($new_picture_create, 255, 255, 255); /** * 将背景图拷贝到画布中 */ imagecopy($new_picture_create, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height); /** * 将目标图片拷贝到背景图片上 */ imagecopy($new_picture_create, $force_picture_create, $this -> force_x, $this -> force_y, $this -> force_start_x, $this -> force_start_y, $force_picture_width, $force_picture_height); $this -> true_color = $new_picture_create; } # end of mark function alpha_(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); $rgb = #cdcdcd; $tran_color = #000000; for($j = 0;$j picture_height-1;$j++){ for ($i = 0;$i picture_width-1;$i++) { $rgb = imagecolorat($this -> picture_create, $i, $j); $r = ($rgb >> 16) & 0xff; $g = ($rgb >> 8) & 0xff; $b = $rgb & 0xff; $now_color = imagecolorallocate($this -> picture_create, $r, $g, $b); if ($now_color == $tran_color) { continue; } else { $color = imagecolorallocatealpha($this -> picture_create, $r, $g, $b, $alpha); imagesetpixel($this -> picture_create, $alpha_x + $i, $alpha_y + $j, $color); } $this -> true_color = $this -> picture_create; } } } /** * 图片旋转: * 沿y轴旋转 */ function turn_y(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); for ($x = 0; $x picture_width; $x++) { imagecopy($this -> true_color, $this -> picture_create, $this -> picture_width - $x - 1, 0, $x, 0, 1, $this -> picture_height); } } /** * 沿x轴旋转 */ function turn_x(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); for ($y = 0; $y picture_height; $y++){ imagecopy($this -> true_color, $this -> picture_create, 0, $this -> picture_height - $y - 1, 0, $y, $this -> picture_width, 1); } } /** * 任意角度旋转 */ function turn(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); imagecopyresized($this -> true_color, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height, $this -> picture_width, $this -> picture_height); $white = imagecolorallocate($this -> true_color, 255, 255, 255); $this -> true_color = imagerotate ($this -> true_color, $this -> circumrotate, $white); } /** * 图片锐化 */ function sharp(){ $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); $cnt = 0; for ($x = 0; $x picture_width; $x++){ for ($y = 0; $y picture_height; $y++){ $src_clr1 = imagecolorsforindex($this -> true_color, imagecolorat($this -> picture_create, $x-1, $y-1)); $src_clr2 = imagecolorsforindex($this -> true_color, imagecolorat($this -> picture_create, $x, $y)); $r = intval($src_clr2[red] + $this -> sharp * ($src_clr2[red] - $src_clr1[red])); $g = intval($src_clr2[green] + $this -> sharp * ($src_clr2[green] - $src_clr1[green])); $b = intval($src_clr2[blue] + $this -> sharp * ($src_clr2[blue] - $src_clr1[blue])); $r = min(255, max($r, 0)); $g = min(255, max($g, 0)); $b = min(255, max($b, 0)); if (($dst_clr = imagecolorexact($this -> picture_create, $r, $g, $b)) == -1) $dst_clr = imagecolorallocate($this -> picture_create, $r, $g, $b); $cnt++; if ($dst_clr == -1) die(color allocate faile at $x, $y ($cnt).); imagesetpixel($this -> true_color, $x, $y, $dst_clr); } } } /** * 将图片反色处理?? */ function return_color(){ /** * 创建一个画布 */ $new_picture_create = imagecreate($this -> picture_width, $this -> picture_height); $white = imagecolorallocate($new_picture_create, 255, 255, 255); /** * 将背景图拷贝到画布中 */ imagecopy($new_picture_create, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height); $this -> true_color = $new_picture_create; } /** * 生成目标图片并显示 */ function show(){ // 判断浏览器,若是ie就不发送头 if(isset($_server['http_user_agent'])) { $ua = strtoupper($_server['http_user_agent']); if(!preg_match('/^.*msie.*\)$/i', $ua)) { header(content-type:$this->picture_mime); } } $out = $this -> picture_type; $out($this -> true_color); } /** * 生成目标图片并保存 */ function save_picture(){ // 以 jpeg 格式将图像输出到浏览器或文件 $out = $this -> picture_type; if(function_exists($out)){ // 判断浏览器,若是ie就不发送头 if(isset($_server['http_user_agent'])) { $ua = strtoupper($_server['http_user_agent']); if(!preg_match('/^.*msie.*\)$/i', $ua)) { header(content-type:$this->picture_mime); } } if(!$this -> true_color){ exit($this -> error['unavilable']); }else{ $out($this -> true_color, $this -> dest_url); $out($this -> true_color); } } } /** * 析构函数：释放图片 */ function __destruct(){ /** * 释放图片 */ imagedestroy($this -> true_color); imagedestroy($this -> picture_create); } # end of class } ?>
这就是非常强大的php图片处理类，好好收藏，亲，相信以后一定会派上用场的。