php 缓存文件入门程序

class PageCache {

 /**
  * @var string $file 缓存文件地址
  * @access public
  */
 public $file;
 
 /**
  * @var int $cacheTime 缓存时间
  * @access public
  */
 public $cacheTime = 3600;
 
 /**
  * 构造函数
  * @param string $file 缓存文件地址
  * @param int $cacheTime 缓存时间
     */
 function __construct($file, $cacheTime = 3600) {
  $this->file = $file;
  $this->cacheTime = $cacheTime;
 }
 
 /**
  * 取缓存内容
  * @param bool 是否直接输出，true直接转到缓存页,false返回缓存内容
  * @return mixed
     */
 public function get($output = true) {
  if (is_file($this->file) && (time()-filemtime($this->file))<=$this->cacheTime && !$_GET['nocache']) {
   if ($output) {
    header('location:' . $this->file);
    exit;
   } else {
    return file_get_contents($this->file);
   }
  } else {
   return false;
  }
 }
 
 /**
  * 设置缓存内容
  * @param $content 内容html字符串
     */
 public function set($content) {
  $fp = fopen($this->file, 'w');
  fwrite($fp, $content);
  fclose($fp);
 }
}

php 日期转换成日时截

private function toTimeStamp ($dateTimeString = NULL) {
  if (!$dateTimeString) {
   $dateTimeString = time();
  }
  $numeric = '';
  $add_space = false;
  for($i=0;$i<strlen($dateTimeString);$i++) {
   if(strpos('0123456789',$dateTimeString[$i])===false) {
    if($add_space) {
     $numeric .= ' ';
     $add_space = false;
    }
   } else {
    $numeric .= $dateTimeString[$i];
    $add_space = true;
   }
  }
  
  $numeric_array = explode(' ',$numeric,6);
  if(sizeof($numeric_array)<3 || ($numeric_array[0]==0 && $numeric_array[1]==0 && $numeric_array[2]==0)) {
   throw new Exception($dateTimeString . ' is an invalid parameter', 5);
  } else {
   $result = mktime(intval($numeric_array[3]), intval($numeric_array[4]), intval($numeric_array[5]),
        intval($numeric_array[1]), intval($numeric_array[2]), intval($numeric_array[0])) ;
  }
  
  return $result;
 
 }

php日期所在月的天数

 public function daysOfMonth ($year=NULL,$month=NULL) {
  if ($year===NULL) {
   $year = $this->getPart('yy');
  }
  if ($month===NULL) {
   $month = $this->getPart('mm');
  }
  if ($month==2)
  {
   if (($year % 4 == 0 && $year % 100 != 0) || $year %

400 == 0)
    $result = 29;
   else
    $result = 28;
  }
  elseif ($month == 4 || $month == 6 || $month == 9 || $month

== 11)
   $result = 30;
  else
   $result = 31;
  return $result;
 }

php 图片处理类，缩略，水印

class Image {

 /**
  * @var string $fileName 文件名
  * @access private
  */
 private $fileName = '';
 
 /**
  * @var gd resource $imageResource 原图像
  * @access private
  */
 private $imageResource = NULL;
 
 /**
  * @var int $imageWidth 原图像宽
  * @access private
  */
 private $imageWidth = NULL;
 
 /**
  * @var int $imageHeight 原图像高
  * @access private
  */
 private $imageHeight = NULL;
 
 /**
  * @var int $imageType 原图像类型
  * @access private
  */
 private $imageType = NULL;
 
 /**
  * @var int $newResource 新图像
  * @access private
  */
 private $newResource = NULL;
 
 /**
  * @var int $newResType 新图像类型
  * @access private
  */
 private $newResType = NULL;
 
 /**
  * 构造函数
  * @param string $fileName 文件名
     */
 public function __construct($fileName = NULL) {
  $this->fileName = $fileName;
  if ($this->fileName) {
   $this->getSrcImageInfo();
  }
 }
 
 /**
  * 取源图像信息
  * @access private
  * @return void
  */
 private function getSrcImageInfo() {
  $info = $this->getImageInfo();
  $this->imageWidth = $info[0];
  $this->imageHeight = $info[1];
  $this->imageType = $info[2];
 }

 /**
  * 取图像信息
  * @param string $fileName 文件名
  * @access private
  * @return array
  */
 private function getImageInfo($fileName = NULL) {
  if ($fileName==NULL) {
   $fileName = $this->fileName;
  }
  $info = getimagesize($fileName);
  return $info;
 }

 /**
  * 创建源图像GD 资源
  * @access private
  * @return void
  */
 private function createSrcImage () {
  $this->imageResource = $this->createImageFromFile();
 }

 /**
  * 跟据文件创建图像GD 资源
  * @param string $fileName 文件名
  * @return gd resource
  */
    public function createImageFromFile($fileName = NULL)
    {
  if (!$fileName) {
   $fileName = $this->fileName;
   $imgType = $this->imageType;
  }
        if (!is_readable($fileName) || !file_exists($fileName)) {
            throw new Exception('Unable to open file "' . $fileName . '"');
        }

  if (!$imgType) {
   $imageInfo = $this->getImageInfo($fileName);
   $imgType = $imageInfo[2];
  }
  
        switch ($imgType) {
  case IMAGETYPE_GIF:
   $tempResource = imagecreatefromgif($fileName);
   break;
  case IMAGETYPE_JPEG:
   $tempResource = imagecreatefromjpeg($fileName);
   break;
  case IMAGETYPE_PNG:
   $tempResource = imagecreatefrompng($fileName);
   break;
  case IMAGETYPE_WBMP:
   $tempResource = imagecreatefromwbmp($fileName);
   break;
  case IMAGETYPE_XBM:
   $tempResource = imagecreatefromxbm($fileName);
   break;
  default:
   throw new Exception('错误的图片格式，或图片有问

题！');
        }
  return $tempResource;
    }
 /**
  * 改变图像大小
  * @param int $width 宽
  * @param int $height 高
  * @param string $flag 按什么方式改变 0=长宽转换成参数指定的 1=按比

例缩放，长宽约束在参数指定内，2=以宽为约束缩放，3=以高为约束缩放
  * @return string
  */
 public function resizeImage($width, $height, $flag=1) {
  global $cfg;
  $widthRatio = $width/$this->imageWidth;
  $heightRatio = $height/$this->imageHeight;
  switch ($flag) {
  case 1:
   if ($this->imageHeight < $height && $this-

>imageWidth < $width) {
    $endWidth = $this->imageWidth;
    $endHeight = $this->imageHeight;
    //return;
   } elseif (($this->imageHeight * $widthRatio)

>$height) {
    $endWidth = ceil($this->imageWidth *

$heightRatio);
    $endHeight = $height;
   } else {
    $endWidth = $width;
    $endHeight = ceil($this->imageHeight *

$widthRatio);
   }
   break;
  case 2:
   $endWidth = $width;
   $endHeight = ceil($this->imageHeight * $widthRatio);
   break;
  case 3:
   $endWidth = ceil($this->imageWidth * $heightRatio);
   $endHeight = $height;
   break;
  case 4:
   $endWidth2 = $width;
   $endHeight2 = $height;
   if ($this->imageHeight < $height && $this-

>imageWidth < $width) {
    $endWidth = $this->imageWidth;
    $endHeight = $this->imageHeight;
    //return;
   } elseif (($this->imageHeight * $widthRatio)

<$height) {
    $endWidth = ceil($this->imageWidth *

$heightRatio);
    $endHeight = $height;
   } else {
    $endWidth = $width;
    $endHeight = ceil($this->imageHeight *

$widthRatio);
   }
   break;
  case 5:
   $endWidth2 = $width;
   $endHeight2 = $height;
   if ($this->imageHeight > $height && $this-

>imageWidth > $width) {
    //都大
    $ratio = max($this->imageHeight/

$height,$this->imageWidth/$width);
   }elseif ($this->imageHeight > $height){
    $ratio = $this->imageHeight/$height;
   }elseif ( $this->imageWidth > $width){
    $ratio =$this->imageWidth/$width;
   }else{
    $ratio =1;
   }
   
   $endWidth = $this->imageWidth / $ratio;
   $endHeight = $this->imageHeight / $ratio;
   
   break;
  default:
   $endWidth = $width;
   $endHeight = $height;
   break;
  }
  if ($this->imageResource==NULL) {
   $this->createSrcImage();
  }
  if($flag == 5){
   //直接缩略
   $this->newResource = imagecreatefromjpeg($cfg

['path']['data'].'blank_thumb.jpg');
  }elseif ($flag==4) {
   $this->newResource = imagecreatetruecolor

($endWidth2,$endHeight2);
  } else {
   $this->newResource = imagecreatetruecolor

($endWidth,$endHeight);
  }
  $this->newResType = $this->imageType;
  if($flag == 5){
   $dest_x = ($width-$endWidth)/2;
   $dest_y = ($height-$endHeight)/2;
   imagecopyresampled($this->newResource, $this-

>imageResource, $dest_x, $dest_y, 0, 0, $endWidth, $endHeight,$this-

>imageWidth,$this->imageHeight);
  }else{
   imagecopyresampled($this->newResource, $this-

>imageResource, 0, 0, 0, 0, $endWidth, $endHeight,$this->imageWidth,$this-

>imageHeight);
  }
 }

 /**
  * 给图像加水印
  * @param string $waterContent 水印内容可以是图像文件名，也可以是文

字
  * @param int $pos 位置0-9可以是数组
  * @param int $textFont 字体大字，当水印内容是文字时有效
  * @param string $textColor 文字颜色，当水印内容是文字时有效
  * @return string
  */
 public function waterMark($waterContent, $pos = 0, $textFont=5,

$textColor="#ffffff") {
  $isWaterImage = file_exists($waterContent);
  if ($isWaterImage) {
   $waterImgRes = $this->createImageFromFile

($waterContent);
   $waterImgInfo = $this->getImageInfo($waterContent);
   $waterWidth = $waterImgInfo[0];
   $waterHeight = $waterImgInfo[1];
  } else {
   $waterText = $waterContent;
   //$temp = @imagettfbbox(ceil

($textFont*2.5),0,"./cour.ttf",$waterContent);
   if ($temp) {
    $waterWidth = $temp[2]-$temp[6];
    $waterHeight = $temp[3]-$temp[7];
   } else {
    $waterWidth = 100;
    $waterHeight = 12;
   }
  }
  if ($this->imageResource==NULL) {
   $this->createSrcImage();
  }
  switch($pos)
  {
  case 0://随机
   $posX = rand(0,($this->imageWidth - $waterWidth));
   $posY = rand(0,($this->imageHeight - $waterHeight));
   break;
  case 1://1为顶端居左
   $posX = 0;
   $posY = 0;
   break;
  case 2://2为顶端居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = 0;
   break;
  case 3://3为顶端居右
   $posX = $this->imageWidth - $waterWidth;
   $posY = 0;
   break;
  case 4://4为中部居左
   $posX = 0;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 5://5为中部居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 6://6为中部居右
   $posX = $this->imageWidth - $waterWidth;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 7://7为底端居左
   $posX = 0;
   $posY = $this->imageHeight - $waterHeight;
   break;
  case 8://8为底端居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = $this->imageHeight - $waterHeight;
   break;
  case 9://9为底端居右
   $posX = $this->imageWidth - $waterWidth-20;
   $posY = $this->imageHeight - $waterHeight-10;
   break;
  default://随机
   $posX = rand(0,($this->imageWidth - $waterWidth));
   $posY = rand(0,($this->imageHeight - $waterHeight));
   break;    
  }
  imagealphablending($this->imageResource, true); 
  if($isWaterImage) {
   imagecopy($this->imageResource, $waterImgRes, $posX,

$posY, 0, 0, $waterWidth,$waterHeight);   
  } else {
   $R = hexdec(substr($textColor,1,2));
   $G = hexdec(substr($textColor,3,2));
   $B = hexdec(substr($textColor,5));
   
   $textColor = imagecolorallocate($this-

>imageResource, $R, $G, $B);
   imagestring ($this->imageResource, $textFont, $posX,

$posY, $waterText, $textColor);        
  }
  $this->newResource =  $this->imageResource;
  $this->newResType = $this->imageType;
 }
 
 /**
  * 生成验证码图片
  * @param int $width 宽
  * @param string $height 高
  * @param int $length 长度
  * @param int $validType 0=数字,1=字母,2=数字加字母
  * @param string $textColor 文字颜色
  * @param string $backgroundColor 背景颜色
  * @return void
  */
 public function imageValidate($width, $height, $length = 4,

$validType = 1, $textColor = '#000000', $backgroundColor = '#ffffff') {
  if ($validType==1) {
   //$validString =

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   //$validLength = 52;
   //no i no l
   $validString =

'abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
   $validLength = 48;
  } elseif ($validType==2) {
   //$validString =

'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   //$validLength = 62;
   //no i no l no 1
   $validString =

'023456789abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
   $validLength = 57;
  } else {
   $validString = '0123456789';
   $validLength = 10;
  }
  
  srand((int)time());
  $valid = '';
  for ($i=0; $i<$length; $i++) {
   $valid .= $validString{rand(0, $validLength-1)};
  }
  $this->newResource = imagecreate($width,$height);
  $bgR = hexdec(substr($backgroundColor,1,2));
  $bgG = hexdec(substr($backgroundColor,3,2));
  $bgB = hexdec(substr($backgroundColor,5,2));
  $backgroundColor = imagecolorallocate($this->newResource,

$bgR, $bgG, $bgB);
  $tR = hexdec(substr($textColor,1,2));
  $tG = hexdec(substr($textColor,3,2));
  $tB = hexdec(substr($textColor,5,2));
  $textColor = imagecolorallocate($this->newResource, $tR,

$tG, $tB);
  for ($i=0;$i<strlen($valid);$i++){
   imagestring($this->newResource,5,$i*$width/

$length+3,2, $valid[$i],$textColor);
  }
  $this->newResType = IMAGETYPE_JPEG;
  return $valid;

 }
 
 /**
  * 显示输出图像
  * @return void
  */
 public function display($fileName='', $quality=60) {
 
  $imgType = $this->newResType;
  $imageSrc = $this->newResource;
        switch ($imgType) {
  case IMAGETYPE_GIF:
   if ($fileName=='') {
    header('Content-type: image/gif');
   }
   imagegif($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_JPEG:
   if ($fileName=='') {
    header('Content-type: image/jpeg');
   }
   imagejpeg($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_PNG:
   if ($fileName=='') {
    header('Content-type: image/png');
    imagepng($imageSrc);
   } else {
    imagepng($imageSrc, $fileName);
   }
   break;
  case IMAGETYPE_WBMP:
   if ($fileName=='') {
    header('Content-type: image/wbmp');
   }
   imagewbmp($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_XBM:
   if ($fileName=='') {
    header('Content-type: image/xbm');
   }
   imagexbm($imageSrc, $fileName, $quality);
   break;
  default:
   throw new Exception('Unsupport image type');
        }
  imagedestroy($imageSrc);
 }
 
 /**
  * 保存图像
  * @param int $fileNameType 文件名类型 0使用原文件名，1使用指定的文

件名，2在原文件名加上后缀，3产生随机文件名
  * @param string $folder 文件夹路径 为空为与原文件相同
  * @param string $param 参数$fileNameType为2时为文件名加后缀
  * @return void
  */
 public function save($fileNameType = 0, $folder = NULL, $param =

'_miniature') {
  if ($folder==NULL) {
   $folder = dirname($this-

>fileName).DIRECTORY_SEPARATOR;
   
  }
  $fileExtName = FileSystem::fileExt($this->fileName, true);
  $fileBesicName = FileSystem::getBasicName($this->fileName,

false);
  switch ($fileNameType) {
   case 1:
    //$newFileName = $folder.$param;
    $newFileName = $folder.basename($this-

>fileName);
    //var_dump($newFileName);
    break;
   case 2:
    $newFileName =

$folder.$fileBesicName.$param.$fileExtName;
    break;
   case 3:
    $tmp = date('YmdHis');
    $fileBesicName = $tmp;
    $i = 0;
    while (file_exists

($folder.$fileBesicName.$fileExtName)) {
     $fileBesicName = $tmp.$i;
     $i++;
    }
    $newFileName =

$folder.$fileBesicName.$fileExtName;
    break;
   default:
    $newFileName = $this->fileName;
    break;
  }
  $this->display($newFileName);
  return $newFileName;
 }
 /**
  * 剪切出选定区域
  *
  * @param string $srcimgurl  原图
  * @param string $endimgurl 处理过的图
  * @param int $x 坐标原点X
  * @param int $y 坐标原点Y
  * @param int $endimg_w 最终图宽
  * @param int $endimg_h 最终图高
  * @param int $border_w 末坐标X
  * @param int $border_h 末坐标Y
  * @param int $scale 原图缩放情况百分比
  * @param int $fix 是否自动取值
  */
 public function cutimg

($srcimgurl,$endimgurl,$x,$y,$endimg_w,$endimg_h,$border_w,$border_h,$scale=

100,$fix=0){
  $path = dirname ($endimgurl);
  if (!is_dir($path)) {
   if(!@mkdir ($path, 0777)){
    die ("{$path} 此目录不能创建,文件创建失败");
   }
  }
  $ground_info = getimagesize($srcimgurl);
  switch($ground_info[2]){
   case 1:$im = imagecreatefromgif($srcimgurl);break;
   case 2:$im = imagecreatefromjpeg($srcimgurl);break;
   case 3:$im = imagecreatefrompng($srcimgurl);break;
   default:die("图片格式不允许$srcimgurl");
     }
  if($fix){//方便截取头像的一部分
   if($ground_info[0]<$ground_info[1]){
    $border_w=$ground_info[0];
    $border_h=$endimg_h*$ground_info[0]/

$endimg_w;
   }elseif($ground_info[0]>$ground_info[1]){
    $border_h=$ground_info[1];
    $border_w=$endimg_w*$ground_info[1]/

$endimg_h;
   }else{
    $border_w=$ground_info[0];
    $border_h=$ground_info[1];
   }
  }
  $newim = imagecreatetruecolor($endimg_w, $endimg_h);
  $x=($x*100)/$scale;
  $y=($y*100)/$scale;
  $border_width=($border_w*100)/$scale;
  $border_height=($border_h*100)/$scale;
  imagecopyresampled($newim, $im, 0,0, $x,$y, $endimg_w,

$endimg_h, $border_width, $border_height );
  if(function_exists("imagegif")){
   switch($ground_info[2]){
    case 1:imagegif($newim,$endimgurl);break;
    case 2:imagejpeg($newim,$endimgurl);break;
    case 3:imagepng($newim,$endimgurl);break;
    default:die("errorMsg");
   }
  }elseif(function_exists("imagejpeg")){
   imagejpeg($newim,$endimgurl);
  }else{
   imagepng($newim,$endimgurl);
  }
  imagedestroy ($newim);
  imagedestroy ($im);
 }
}

image2wbmp
（PHP 4中“= 4.0.5，PHP 5中）

image2wbmp - 输出图像浏览器或文件

报告错误描述
布尔image2wbmp（$oimg[，$filename[，soruce]]）
image2wbmp（）输出或保存一个给定的图像WBMP版本。

报告错误参数

图片
图像资源，通过创造的图像功能，如，一返回imagecreatetruecolor（）。

文件名
路径保存的文件。如果没有给出原始图像流将被直接输出。

开始
阈值介于0和255（含）。


报告错误返回值
返回TRUE，成功或失败则返回FALSE。

报告错误的例子

<?php
$file = 'php.png';
$image = imagecreatefrompng($file);

header('Content-type: ' . image_type_to_mime_type(IMAGETYPE_WBMP));
image2wbmp($image); // output the stream directly
imagedestroy($image);
?>