自己写的php图片类库我也是经常在自己做项目中使用供大家使用

2014 年 6 月 18 日5110

code如下：
<?php

//需要在外部定义常量
//define("IN",'true');
if(!defined('IN')){
die('Haking in');
}

/*
*http://http://www.zjjv.com///thread-6893-1-1.html
*图像操作类库
*类库中水印，英文数字验证码，缩略图功能
*
*/

class Image{
//获取图片的详细信息
public function getImageInfo($image){
$info = getimagesize($image);
if($info !== false){
$type = strtolower(substr(image_type_to_extension($info[2]),1));
$size = filesize($image);
$ImageInfo = array(
'type'=>$type,
'size'=>$size,
'width'=>$info[0],
'height'=>$info[1],
'mime'=>$info['mime']
);
}
return $ImageInfo;
}
//建立英文数字验证码
public function buildImageVerify(){
$image = imagecreate($width, $height);
$r = Array(225, 255, 255, 223);
$g = Array(225, 236, 237, 255);
$b = Array(225, 236, 166, 125);
$keys = mt_rand(0,3);
$bg = imagecolorallocate($image,$r[$keys],$g[$keys],$b[$keys]);//背景色
$border = imagecolorallocate($image,100,100,100);
$stringColor = imagecolorallocate($image, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
for ($i = 0; $i < 25; $i++) {

imagesetpixel($image, mt_rand(0, $width), mt_rand(0, $height), $stringColor);
}
for($i=0;$i<4;$i++){
$rand = dechex(mt_rand(0,15));
$num.=$rand;
imagestring($image,5,$i*10+5,mt_rand(1,8),$rand,$stringColor);
}
$_SESSION['verify'] = md5($num);
$this->out($image,$type);
}
//生成缩略图
public function thumb($image, $thumbName, $scale = 0.2){

$info = $this->getImageInfo($image);
$sWdith = $info['width'];
$sHeight= $info['height'];
$type = $info['type'];
$imageFun = 'imagecreatefrom'.($type=='jpg'?'jpeg':$type);
$simg = $imageFun($image);
$thumbW = $sWdith * $scale;
$thumbH = $sHeight * $scale;
if($type !='gif' && function_exists('imagecreatetruecolor')){
$thumbImg = imagecreatetruecolor($thumbW,$thumbH);
}else{
$thumbImg = imagecreate($thumbW,$thumbH);
}
imagecopyresized($thumbImg,$simg,0,0,0,0,$thumbW,$thumbH,$sWdith,$sHeight);
$outImage = "image".($type=='jpg'?'jpeg':$type);
$outImage($thumbImg,$thumbName);
imagedestroy($simg);
imagedestroy($thumbImg);
return $thumbName;
}
//生成水印
public function water($source,$water,$alpha=60){
if(!file_exists($source) && !file_exists($water)){
return false;
}
$sInfo = $this->getImageInfo($source);
$wInfo = $this->getImageInfo($water);
$sType = $sInfo['type'];
$wType = $wInfo['type'];
$sFun = "imagecreatefrom".$sType;
$sImage= $sFun($source);
$wFun = "imagecreatefrom".$wType;
$wImage= $wFun($water);
imagealphablending($wImage, true);
//图像位置,默认为右下角右对齐
$posX =$sInfo['width'] - $wInfo['width'];
$posY =$sInfo['height'] - $wInfo['height'];
imagecopymerge($sImage,$wImage,$posX,$posY,0,0,$wInfo['width'],$wInfo['height'],$alpha);
$ImageFun = 'Image' . $sInfo['type'];
$ImageFun($sImage);
imagedestroy($sImage);
imagedestroy($wImage);
}
public function out($image, $type , $filename = ''){
header("Content-type:image/$type");
$imageOut = 'image'.$type;
if(empty($filename)){
$imageOut($image);
}else{
$imageOut($image,$filename);
}
imagedestroy($image);
}
}