這篇文章主要匯總介紹了兩個常用的php圖片處理類(水印、等比縮放、固定高寬)，非常的簡單實用，有需要的小伙伴可以參考下
常用的php圖片處理類(水印、等比縮放、固定高寬)分享
- <?php
- //PHP 添加水印 & 比例縮略圖 & 固定高度 & 固定寬度 類。
- class Image_process{
- public $source; //原圖
- public $source_width; //原圖寬度
- public $source_height; //原圖高度
- public $source_type_id;
- public $orign_name;
- public $orign_dirname;
- //傳入原圖路徑
- public function __construct($source){
- $this->typeList = array(1=>'gif',2=>'jpg',3=>'png');
- $ginfo = getimagesize($source);
- $this->source_width = $ginfo[0];
- $this->source_height = $ginfo[1];
- $this->source_type_id = $ginfo[2];
- $this->orign_url = $source;
- $this->orign_name = basename($source);
- $this->orign_dirname = dirname($source);
- }
- //判斷圖片的文件的格式，返回PHP可識別的編碼
- public function judgeType($type,$source){
- if($type == 1){
- return imagecreatefromgif($source); //gif
- }else if($type == 2){
- return imagecreatefromjpeg($source); //jpg
- }else if($type == 3){
- return imagecreatefrompng($source); //png
- }else{
- return false;
- }
- }
- //生成水印圖片
- public function waterMakeImage($logo){
- $linfo = getimagesize($logo);
- $logo_width = $linfo[0];
- $logo_height = $linfo[1];
- $logo_type_id = $linfo[2];
- $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url);
- $logoHandle = $this->judgeType($logo_type_id,$logo);
- if(!$sourceHandle || !$logoHandle){
- return false;
- }
- $x = ($this->source_width - $logo_width)/2;
- $y = ($this->source_height - $logo_height)/2;
- imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height);
- $newPic = $this->orign_dirname.'/water_'.time().'.'.$this->typeList[$this->source_type_id];
- if($this->saveImage($sourceHandle,$newPic)){
- imagedestroy($sourceHandle);
- imagedestroy($logoHandle);
- }
- }
- //固定高度寬度
- public function fixSizeImage($width,$height){
- if($width > $this->source_width) $this->source_width;
- if($height > $this->source_height) $this->source_height;
- if($width === false){
- $width = floor($this->source_width / ($this->source_height / $height));
- }
- if($height === false){
- $height = floor($this->source_height / ($this->source_width / $width));
- }
- $this->tinyImage($width,$height);
- }
- //等比例縮放圖片
- public function scaleImage($scale){
- $width = floor($this->source_width * $scale);
- $height = floor($this->source_height * $scale);
- $this->tinyImage($width, $height);
- }
- //創建縮略圖
- public function tinyImage($width,$height){
- $tinyImage = imagecreatetruecolor($width,$height);
- $handle = $this->judgeType($this->source_type_id,$this->orign_url);
- if(function_exists('imagecopyresampled')){
- imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
- }else{
- imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
- }
- $newPic = $this->orign_dirname.'/thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id];
- if($this->saveImage($tinyImage,$newPic)){
- imagedestroy($tinyImage);
- imagedestroy($handle);
- }
- }
- //保存圖片
- private function saveImage($image,$url){
- if(imagejpeg($image,$url)){
- return true;
- }
- }
- }
- $imgHandle = new Image_process('D:/AppServ/www/test/getimg/14061907445601.jpg');
- //$imgHandle->waterMakeImage('D:/AppServ/www/test/getimg/shougongke.png'); //生成水印圖片
- //$imgHandle->fixSizeImage(200,150); //固定長度圖片
- $imgHandle->scaleImage(0.2); //等比例縮放
- ?>
- 示例二：
- ?
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- <?php
- /**
- *
- * 圖像處理類
- * @author FC_LAMP
- * @internal功能包含：水印,縮略圖
- */
- class Img
- {
- //圖片格式
- private $exts = array ('jpg', 'jpeg', 'gif', 'bmp', 'png' );
- /**
- *
- *
- * @throws Exception
- */
- public function __construct()
- {
- if (! function_exists ( 'gd_info' ))
- {
- throw new Exception ( '加載GD庫失??！' );
- }
- }
- /**
- *
- * 裁剪壓縮
- * @param $src_img 圖片
- * @param $save_img 生成后的圖片
- * @param $option 參數選項，包括： $maxwidth 寬 $maxheight 高
- * array('width'=>xx,'height'=>xxx)
- * @internal
- * 我們一般的壓縮圖片方法，在圖片過長或過寬時生成的圖片
- * 都會被“壓扁”，針對這個應采用先裁剪后按比例壓縮的方法
- */
- public function thumb_img($src_img, $save_img = '', $option)
- {
- if (empty ( $option ['width'] ) or empty ( $option ['height'] ))
- {
- return array ('flag' => False, 'msg' => '原圖長度與寬度不能小于0' );
- }
- $org_ext = $this->is_img ( $src_img );
- if (! $org_ext ['flag'])
- {
- return $org_ext;
- }
- //如果有保存路徑，則確定路徑是否正確
- if (! empty ( $save_img ))
- {
- $f = $this->check_dir ( $save_img );
- if (! $f ['flag'])
- {
- return $f;
- }
- }
- //獲取出相應的方法
- $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );
- //獲取原大小
- $source = $org_funcs ['create_func'] ( $src_img );
- $src_w = imagesx ( $source );
- $src_h = imagesy ( $source );
- //調整原始圖像(保持圖片原形狀裁剪圖像)
- $dst_scale = $option ['height'] / $option ['width']; //目標圖像長寬比
- $src_scale = $src_h / $src_w; // 原圖長寬比
- if ($src_scale >= $dst_scale)
- { // 過高
- $w = intval ( $src_w );
- $h = intval ( $dst_scale * $w );
- $x = 0;
- $y = ($src_h - $h) / 3;
- } else
- { // 過寬
- $h = intval ( $src_h );
- $w = intval ( $h / $dst_scale );
- $x = ($src_w - $w) / 2;
- $y = 0;
- }
- // 剪裁
- $croped = imagecreatetruecolor ( $w, $h );
- imagecopy ( $croped, $source, 0, 0, $x, $y, $src_w, $src_h );
- // 縮放
- $scale = $option ['width'] / $w;
- $target = imagecreatetruecolor ( $option ['width'], $option ['height'] );
- $final_w = intval ( $w * $scale );
- $final_h = intval ( $h * $scale );
- imagecopyresampled ( $target, $croped, 0, 0, 0, 0, $final_w, $final_h, $w, $h );
- imagedestroy ( $croped );
- //輸出(保存)圖片
- if (! empty ( $save_img ))
- {
- $org_funcs ['save_func'] ( $target, $save_img );
- } else
- {
- header ( $org_funcs ['header'] );
- $org_funcs ['save_func'] ( $target );
- }
- imagedestroy ( $target );
- return array ('flag' => True, 'msg' => '' );
- }
- /**
- *
- * 等比例縮放圖像
- * @param $src_img 原圖片
- * @param $save_img 需要保存的地方
- * @param $option 參數設置 array('width'=>xx,'height'=>xxx)
- *
- */
- function resize_image($src_img, $save_img = '', $option)
- {
- $org_ext = $this->is_img ( $src_img );
- if (! $org_ext ['flag'])
- {
- return $org_ext;
- }
- //如果有保存路徑，則確定路徑是否正確
- if (! empty ( $save_img ))
- {
- $f = $this->check_dir ( $save_img );
- if (! $f ['flag'])
- {
- return $f;
- }
- }
- //獲取出相應的方法
- $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );
- //獲取原大小
- $source = $org_funcs ['create_func'] ( $src_img );
- $src_w = imagesx ( $source );
- $src_h = imagesy ( $source );
- if (($option ['width'] && $src_w > $option ['width']) || ($option ['height'] && $src_h > $option ['height']))
- {
- if ($option ['width'] && $src_w > $option ['width'])
- {
- $widthratio = $option ['width'] / $src_w;
- $resizewidth_tag = true;
- }
- if ($option ['height'] && $src_h > $option ['height'])
- {
- $heightratio = $option ['height'] / $src_h;
- $resizeheight_tag = true;
- }
- if ($resizewidth_tag && $resizeheight_tag)
- {
- if ($widthratio < $heightratio)
- $ratio = $widthratio;
- else
- $ratio = $heightratio;
- }
- if ($resizewidth_tag && ! $resizeheight_tag)
- $ratio = $widthratio;
- if ($resizeheight_tag && ! $resizewidth_tag)
- $ratio = $heightratio;
- $newwidth = $src_w * $ratio;
- $newheight = $src_h * $ratio;
- if (function_exists ( "imagecopyresampled" ))
- {
- $newim = imagecreatetruecolor ( $newwidth, $newheight );
- imagecopyresampled ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );
- } else
- {
- $newim = imagecreate ( $newwidth, $newheight );
- imagecopyresized ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );
- }
- }
- //輸出(保存)圖片
- if (! empty ( $save_img ))
- {
- $org_funcs ['save_func'] ( $newim, $save_img );
- } else
- {
- header ( $org_funcs ['header'] );
- $org_funcs ['save_func'] ( $newim );
- }
- imagedestroy ( $newim );
- return array ('flag' => True, 'msg' => '' );
- }
- /**
- *
- * 生成水印圖片
- * @param $org_img 原圖像
- * @param $mark_img 水印標記圖像
- * @param $save_img 當其目錄不存在時，會試著創建目錄
- * @param array $option 為水印的一些基本設置包含：
- * x:水印的水平位置,默認為減去水印圖寬度后的值
- * y:水印的垂直位置,默認為減去水印圖高度后的值
- * alpha:alpha值(控制透明度),默認為50
- */
- public function water_mark($org_img, $mark_img, $save_img = '', $option = array())
- {
- //檢查圖片
- $org_ext = $this->is_img ( $org_img );
- if (! $org_ext ['flag'])
- {
- return $org_ext;
- }
- $mark_ext = $this->is_img ( $mark_img );
- if (! $mark_ext ['flag'])
- {
- return $mark_ext;
- }
- //如果有保存路徑，則確定路徑是否正確
- if (! empty ( $save_img ))
- {
- $f = $this->check_dir ( $save_img );
- if (! $f ['flag'])
- {
- return $f;
- }
- }
- //獲取相應畫布
- $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );
- $org_img_im = $org_funcs ['create_func'] ( $org_img );
- $mark_funcs = $this->get_img_funcs ( $mark_ext ['msg'] );
- $mark_img_im = $mark_funcs ['create_func'] ( $mark_img );
- //拷貝水印圖片坐標
- $mark_img_im_x = 0;
- $mark_img_im_y = 0;
- //拷貝水印圖片高寬
- $mark_img_w = imagesx ( $mark_img_im );
- $mark_img_h = imagesy ( $mark_img_im );
- $org_img_w = imagesx ( $org_img_im );
- $org_img_h = imagesx ( $org_img_im );
- //合成生成點坐標
- $x = $org_img_w - $mark_img_w;
- $org_img_im_x = isset ( $option ['x'] ) ? $option ['x'] : $x;
- $org_img_im_x = ($org_img_im_x > $org_img_w or $org_img_im_x < 0) ? $x : $org_img_im_x;
- $y = $org_img_h - $mark_img_h;
- $org_img_im_y = isset ( $option ['y'] ) ? $option ['y'] : $y;
- $org_img_im_y = ($org_img_im_y > $org_img_h or $org_img_im_y < 0) ? $y : $org_img_im_y;
- //alpha
- $alpha = isset ( $option ['alpha'] ) ? $option ['alpha'] : 50;
- $alpha = ($alpha > 100 or $alpha < 0) ? 50 : $alpha;
- //合并圖片
- imagecopymerge ( $org_img_im, $mark_img_im, $org_img_im_x, $org_img_im_y, $mark_img_im_x, $mark_img_im_y, $mark_img_w, $mark_img_h, $alpha );
- //輸出(保存)圖片
- if (! empty ( $save_img ))
- {
- $org_funcs ['save_func'] ( $org_img_im, $save_img );
- } else
- {
- header ( $org_funcs ['header'] );
- $org_funcs ['save_func'] ( $org_img_im );
- }
- //銷毀畫布
- imagedestroy ( $org_img_im );
- imagedestroy ( $mark_img_im );
- return array ('flag' => True, 'msg' => '' );
- }
- /**
- *
- * 檢查圖片
- * @param unknown_type $img_path
- * @return array('flag'=>true/false,'msg'=>ext/錯誤信息)
- */
- private function is_img($img_path)
- {
- if (! file_exists ( $img_path ))
- {
- return array ('flag' => False, 'msg' => "加載圖片 $img_path 失??！" );
- }
- $ext = explode ( '.', $img_path );
- $ext = strtolower ( end ( $ext ) );
- if (! in_array ( $ext, $this->exts ))
- {
- return array ('flag' => False, 'msg' => "圖片 $img_path 格式不正確！" );
- }
- return array ('flag' => True, 'msg' => $ext );
- }
- /**
- *
- * 返回正確的圖片函數
- * @param unknown_type $ext
- */
- private function get_img_funcs($ext)
- {
- //選擇
- switch ($ext)
- {
- case 'jpg' :
- $header = 'Content-Type:image/jpeg';
- $createfunc = 'imagecreatefromjpeg';
- $savefunc = 'imagejpeg';
- break;
- case 'jpeg' :
- $header = 'Content-Type:image/jpeg';
- $createfunc = 'imagecreatefromjpeg';
- $savefunc = 'imagejpeg';
- break;
- case 'gif' :
- $header = 'Content-Type:image/gif';
- $createfunc = 'imagecreatefromgif';
- $savefunc = 'imagegif';
- break;
- case 'bmp' :
- $header = 'Content-Type:image/bmp';
- $createfunc = 'imagecreatefrombmp';
- $savefunc = 'imagebmp';
- break;
- default :
- $header = 'Content-Type:image/png';
- $createfunc = 'imagecreatefrompng';
- $savefunc = 'imagepng';
- }
- return array ('save_func' => $savefunc, 'create_func' => $createfunc, 'header' => $header );
- }
- /**
- *
- * 檢查并試著創建目錄
- * @param $save_img
- */
- private function check_dir($save_img)
- {
- $dir = dirname ( $save_img );
- if (! is_dir ( $dir ))
- {
- if (! mkdir ( $dir, 0777, true ))
- {
- return array ('flag' => False, 'msg' => "圖片保存目錄 $dir 無法創建！" );
- }
- }
- return array ('flag' => True, 'msg' => '' );
- }
- }
- if (! empty ( $_FILES ['test'] ['tmp_name'] ))
- {
- //例子
- $img = new Img ();
- //原圖
- $name = explode ( '.', $_FILES ['test'] ['name'] );
- $org_img = 'D:/test.' . end ( $name );
- move_uploaded_file ( $_FILES ['test'] ['tmp_name'], $org_img );
- $option = array ('width' => $_POST ['width'], 'height' => $_POST ['height'] );
- if ($_POST ['type'] == 1)
- {
- $s = $img->resize_image ( $org_img, '', $option );
- } else
- {
- $img->thumb_img ( $org_img, '', $option );
- }
- unlink ( $org_img );
- }
以上所述就是本文的全部內容了，希望大家能夠喜歡。
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