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PHP中的图片处理类有哪些？很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
具体代码如下：
<?php
class picture{
var $PICTURE_URL; //要处理的图片
var $DEST_URL = "temp__01.jpg"; //生成目标图片位置
var $PICTURE_CREATE; //要创建的图片
var $TURE_COLOR; //新建一个真彩图象
var $PICTURE_WIDTH; //原图片宽度
var $PICTURE_HEIGHT; //原图片高度
/**
* 水印的类型，默认的为水印文字
*/
var $MARK_TYPE = 1;
var $WORD; //经过UTF-8后的文字
var $WORD_X; //文字横坐标
var $WORD_Y; //文字纵坐标
var $FONT_TYPE; //字体类型
var $FONT_SIZE = "12"; //字体大小
var $FONT_WORD; //文字
var $ANGLE = 0; //文字的角度，默认为0
var $FONT_COLOR = "#000000"; //文字颜色
var $FONT_PATH = "font/simkai.ttf"; //字体库，默认为宋体
var $FORCE_URL; //水印图片
var $FORCE_X = 0; //水印横坐标
var $FORCE_Y = 0; //水印纵坐标
var $FORCE_START_X = 0; //切起水印的图片横坐标
var $FORCE_START_Y = 0; //切起水印的图片纵坐标
var $PICTURE_TYPE; //图片类型
var $PICTURE_MIME; //输出的头部
/**
* 缩放比例为1的话就按缩放高度和宽度缩放
*/
var $ZOOM = 1; //缩放类型
var $ZOOM_MULTIPLE; //缩放比例
var $ZOOM_WIDTH; //缩放宽度
var $ZOOM_HEIGHT; //缩放高度
/**
* 裁切，按比例和固定长度、宽度
*/
var $CUT_TYPE = 1; //裁切类型
var $CUT_X = 0; //裁切的横坐标
var $CUT_Y = 0; //裁切的纵坐标
var $CUT_WIDTH = 100; //裁切的宽度
var $CUT_HEIGHT = 100; //裁切的高度
/**
* 锐化
*/
var $SHARP = "7.0"; //锐化程度
/**
* 透明度处理
*/
var $ALPHA = '100'; //透明度在0-127之间
var $ALPHA_X = "90";
var $ALPHA_Y = "50";
/**
* 任意角度旋转
*/
var $CIRCUMROTATE = "90.0"; //注意，必须为浮点数
/**
* 出错信息
*/
var $ERROR = array(
'unalviable' => '没有找到相关图片!'
);
/**
* 构造函数：函数初始化
*/
function __construct($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 <= $this -> PICTURE_HEIGHT-1;$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;
}
}
}
/**
* 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 < $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轴旋转
*/
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 < $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);
}
}
}
/**
* 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
}
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