php实现的通用图片处理类，本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下：
该图片处理函数功能：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。 在一些需要图片高级处理功能的web应用中，可以参考这个类。
'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_; $this->picture_height=$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_;gt;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_; $force_picture_height=$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_;gt;force_start_x; } else { $create_;gt;picture_width; } if($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 markfunction alpha_(){ $this->true_color=imagecreatetruecolor($this->picture_width,$this->picture_height); $rgb=#cdcdcd; $tran_color=#000000; for($j=0;$jpicture_height-1;$j++) { for ($i=0;$ipicture_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; $xpicture_width; $x++) { for ($y=0; $ypicture_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}?>
希望本文所述对大家的php程序设计有所帮助。
http://www.bkjia.com/phpjc/972631.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/972631.htmltecharticlephp实现的通用图片处理类， 本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下： 该图片处理函数功能：缩放、...