本文實例講述了php實現的通用圖片處理類。分享給大家供大家參考。具體如下：
該圖片處理函數功能：縮放、剪切、相框、水印、銳化、旋轉、翻轉、透明度、反色，處理並保存歷史記錄的思路：當有圖片有改動時自動生成一張新圖片，命名方式可以考慮在原圖片的基礎上加上步驟，例如：圖片名稱+__第幾步。 在一些需要圖片高級處理功能的Web應用中，可以參考這個類。
<?php
class picture
{
var $PICTURE_URL;//要處理的圖片
var $DEST_URL="temp__01.jpg";//生成目標圖片位置
var $PICTURE_CREATE;//要創建的圖片
var $TURE_COLOR;//新建一個真彩圖象
var $PICTURE_WIDTH;//原圖片寬度
var $PICTURE_HEIGHT;//原圖片高度
/*
水印的類型，默認的為水印文字
*/
var $MARK_TYPE=1;
var $WORD;//經過UTF-8後的文字
var $WORD_X;//文字橫坐標
var $WORD_Y;//文字縱坐標
var $FONT_TYPE;//字體類型
var $FONT_SIZE="12";//字體大小
var $FONT_WORD;//文字
var $ANGLE=0;//文字的角度，默認為0
var $FONT_COLOR="#000000";//文字顏色
var $FONT_PATH="font/simkai.ttf";//字體庫，默認為宋體
var $FORCE_URL;//水印圖片
var $FORCE_X=0;//水印橫坐標
var $FORCE_Y=0;//水印縱坐標
var $FORCE_START_X=0;//切起水印的圖片橫坐標
var $FORCE_START_Y=0;//切起水印的圖片縱坐標
var $PICTURE_TYPE;//圖片類型
var $PICTURE_MIME;//輸出的頭部
/*
縮放比例為1的話就按縮放高度和寬度縮放
*/
var $ZOOM=1;//縮放類型
var $ZOOM_MULTIPLE;//縮放比例
var $ZOOM_WIDTH;//縮放寬度
var $ZOOM_HEIGHT;//縮放高度
/*
裁切，按比例和固定長度、寬度
*/
var $CUT_TYPE=1;//裁切類型
var $CUT_X=0;//裁切的橫坐標
var $CUT_Y=0;//裁切的縱坐標
var $CUT_;//裁切的寬度
var $CUT_HEIGHT=100;//裁切的高度
/*
銳化
*/
var $SHARP="7.0";//銳化程度
/*
透明度處理
*/
var $ALPHA='100';//透明度在0-127之間
var $ALPHA_X="90";
var $ALPHA_Y="50";
/*
任意角度旋轉
*/
var $CIRCUMROTATE="90.0";//注意，必須為浮點數
/*
出錯信息
*/
var $ERROR=array(
'unalviable'=>'沒有找到相關圖片!'
);
/*
構造函數：函數初始化
*/
function __construct($PICTURE_URL)
{
$this->get_info($PICTURE_URL);
}
function get_info($PICTURE_URL)
{
/*
處理原圖片的信息,先檢測圖片是否存在,不存在則給出相應的信息
*/
@$SIZE=getimagesize($PICTURE_URL);
if(!$SIZE)
{
exit($this->ERROR['unalviable']);
}
//得到原圖片的信息類型、寬度、高度
$this->PICTURE_MIME=$SIZE['mime'];
$this->PICTURE_;
$this->PICTURE_HEIGHT=$SIZE[1];
//創建圖片
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";
$this->PICTURE_EXT="png";
break;
}
/*
文字顏色轉換16進制轉換成10進制
*/
preg_match_all("/([0-f]){2,2}/i",$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
/*
將16進制的顏色轉換成10進制的（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]);
}
}
//縮放類型
function zoom_type($ZOOM_TYPE)
{
$this->ZOOM=$ZOOM_TYPE;
}
//對圖片進行縮放,如果不指定高度和寬度就進行縮放
function zoom()
{
//縮放的大小
if($this->ZOOM==0)
{
$this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE;
$this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE;
}
//新建一個真彩圖象
$this->TRUE_COLOR=imagecreatetruecolor($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
//裁切圖片,按坐標或自動
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
/*
在圖片上放文字或圖片
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 字體的文本的范圍
*/
$TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD);
$WORD_LENGTH=strlen($this->WORD);
$WORD_WIDTH =$TEMP[2] - $TEMP[6];
$WORD_HEIGHT =$TEMP[3] - $TEMP[7];
/*
文字水印的默認位置為右下角
*/
if($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,$this->WORD);
}
/*
水印圖片
*/
function _mark_picture()
{
/*
獲取水印圖片的信息
*/
@$SIZE=getimagesize($this->FORCE_URL);
if(!$SIZE)
{
exit($this->ERROR['unalviable']);
}
$FORCE_PICTURE_;
$FORCE_PICTURE_HEIGHT=$SIZE[1];
//創建水印圖片
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;
}
/*
判斷水印圖片的大小，並生成目標圖片的大小，如果水印比圖片大，則生成圖片大小為水印圖片的大小。否則生成的圖片大小為原圖片大小。
*/
$this->NEW_PICTURE=$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;
}
/*
創建一個畫布
*/
$NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT);
$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
/*
將背景圖拷貝到畫布中
*/
imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
/*
將目標圖片拷貝到背景圖片上
*/
imagecopy($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;$j<=$this->PICTURE_HEIGHT-1;$j++)
{
for ($i=0;$i<=$this->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;
}
}
}
/*
圖片旋轉:
沿y軸旋轉
*/
function turn_y()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
for ($x = 0; $x < $this->PICTURE_WIDTH; $x++)
{
imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, $this->PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this->PICTURE_HEIGHT);
}
}
/*
沿X軸旋轉
*/
function turn_x()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++)
{
imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, $this->PICTURE_HEIGHT - $y - 1, 0, $y, $this->PICTURE_WIDTH, 1);
}
}
/*
任意角度旋轉
*/
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);
}
/*
圖片銳化
*/
function sharp()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$cnt=0;
for ($x=0; $x<$this->PICTURE_WIDTH; $x++)
{
for ($y=0; $y<$this->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);
}
}
}
/*
將圖片反色處理??
*/
function return_color()
{
/*
創建一個畫布
*/
$NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
/*
將背景圖拷貝到畫布中
*/
imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}
/*
生成目標圖片並顯示
*/
function show()
{
// 判斷浏覽器,若是IE就不發送頭
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);
}
/*
生成目標圖片並保存
*/
function save_picture()
{
// 以 JPEG 格式將圖像輸出到浏覽器或文件
$OUT=$this->PICTURE_TYPE;
if(function_exists($OUT))
{
// 判斷浏覽器,若是IE就不發送頭
if(isset($_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);
}
}
}
/*
析構函數：釋放圖片
*/
function __destruct()
{
/*釋放圖片*/
imagedestroy($this->TRUE_COLOR);
imagedestroy($this->PICTURE_CREATE);
}
//end of class
}
?>
希望本文所述對大家的php程序設計有所幫助。
