PHP缓冲ob_start和页面文件缓存

ob_start(); 

2 内容 

3 echo ob_get_contents() ;

$cache = new Cache();

$value = $cache->get('data_key');4、写入缓存

$value = $cache->put('data_key', 'data_value');完整实例：

$cache = new Cache();

//从缓存从读取键值 $key 的数据
$values = $cache->get($key);

//如果没有缓存数据
if ($values == false) {
 //insert code here...
 //写入键值 $key 的数据
 $cache->put($key, $values);
} else {
 //insert code here...
}
Cache.class.php

<?php
class Cache {
 private $cache_path;//path for the cache
 private $cache_expire;//seconds that the cache expires

 //cache constructor, optional expiring time and cache path
 public function Cache($exp_time=3600,$path="cache/"){
  $this->cache_expire=$exp_time;
  $this->cache_path=$path;
 }

 //returns the filename for the cache
 private function fileName($key){
  return $this->cache_path.md5($key);
 }

 //creates new cache files with the given data, $key== name of the cache, data the info/values to store
 public function put($key, $data){
  $values = serialize($data);
  $filename = $this->fileName($key);
  $file = fopen($filename, 'w');
     if ($file){//able to create the file
         fwrite($file, $values);
         fclose($file);
     }
     else return false;
 }

 //returns cache for the given key
 public function get($key){
  $filename = $this->fileName($key);
  if (!file_exists($filename) || !is_readable($filename)){//can't read the cache
   return false;
  }
  if ( time() < (filemtime($filename) + $this->cache_expire) ) {//cache for the key not expired
   $file = fopen($filename, "r");// read data file
         if ($file){//able to open the file
             $data = fread($file, filesize($filename));
             fclose($file);
             return unserialize($data);//return the values
         }
         else return false;
  }
  else return false;//was expired you need to create new
  }
}
?>

<?php

//测试时文件的编码方式要是UTF8

$str='中文a字1符';

echo strlen($str).'<br>';//14

echo mb_strlen($str,'utf8').'<br>';//6

echo mb_strlen($str,'gbk').'<br>';//8

echo mb_strlen($str,'gb2312').'<br>';//10

?> 

<?php

/**

* PHP判断字符串纯汉字 OR 纯英文 OR 汉英混合

*/
echo '<meta charset="utf-8" />';

function utf8_str($str){

$mb = mb_strlen($str,'utf-8');

$st = strlen($str);

if($st==$mb)

return '纯英文';

if($st%$mb==0 && $st%3==0)

return '纯汉字';

return '汉英混合';

}

$str = '琼台博客';

echo '字符串：<span style="color:red">'.$str.'</span>，是<span style="color:red">'.utf8_str($str).'</span>';

?>

;extension=php_ldap.dll

改成

extension=php_ldap.dll

extension_dir = c:php4
extension=php_zlib.dll
extension =php_ldap.dll
extension =php_zlib.dll
extension =php_calendar.dll
extension =php_exif.dll
extension =php_ftp.dll
extension =php_mssql70.dll （这一项不要加，没有MSSQL7.0呀）
extension =php_imap.dll

C:/Windows/System/System32
C:/Windows/System
C:/Windows

public function request($method = null)
    {
        if (! $this->uri instanceof Zend_Uri_Http) {
            /** @see Zend_Http_Client_Exception */
            require_once 'Zend/Http/Client/Exception.php';
            throw new Zend_Http_Client_Exception('No valid URI has been passed to the client');
        }

        if ($method) {
            $this->setMethod($method);
        }
        $this->redirectCounter = 0;
        $response = null;

        // Make sure the adapter is loaded
        if ($this->adapter == null) {
            $this->setAdapter($this->config['adapter']);
        }

        // Send the first request. If redirected, continue.
        do {
            // Clone the URI and add the additional GET parameters to it
           //省略一万字
        } while ($this->redirectCounter < $this->config['maxredirects']);

        return $response;
    }

<?php
header('Content-type: text/json');

$fruits = array (
    "fruits"  => array("a" => "orange", "b" => "banana", "c" => "apple"),
    "numbers" => array(1, 2, 3, 4, 5, 6),
    "holes"   => array("first", 5 => "second", "third")
);
echo json_encode($fruits);
?>

<?php
$array = array
 (
   'title'=>iconv('gb2312','utf-8','这里是中文标题'),
  'body'=>'abcd...'
 );

echo json_encode($array);
?>

{"title":"u8fd9u91ccu662fu4e2du6587u6807u9898","body":"abcd..."}

$(function(){
     $('#send').click(function() {
          $.getJSON('json.php', function(data) {
              $('#resText').empty();
   var html = '';
   $.each( data  , function(commentIndex, comment) {
    html += '<div class="comment"><h6>' + comment['username'] + ':</h6><p class="para">' + comment['content'] + '</p></div>';
   })
  $('#resText').html(html);
         })
    })
})

<?php
/**************************************************************
 *
 * 使用特定function对数组中所有元素做处理
 * @param string &$array  要处理的字符串
 * @param string $function 要执行的函数
 * @return boolean $apply_to_keys_also  是否也应用到key上
 * @access public
 *
 *************************************************************/
function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
{
    static $recursive_counter = 0;
    if (++$recursive_counter > 1000) {
        die('possible deep recursion attack');
    }
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            arrayRecursive($array[$key], $function, $apply_to_keys_also);
        } else {
            $array[$key] = $function($value);
        }
 
        if ($apply_to_keys_also && is_string($key)) {
            $new_key = $function($key);
            if ($new_key != $key) {
                $array[$new_key] = $array[$key];
                unset($array[$key]);
            }
        }
    }
    $recursive_counter--;
}
 
/**************************************************************
 *
 * 将数组转换为JSON字符串（兼容中文）
 * @param array $array  要转换的数组
 * @return string  转换得到的json字符串
 * @access public
 *
 *************************************************************/
function JSON($array) {
 arrayRecursive($array, 'urlencode', true);
 $json = json_encode($array);
 return urldecode($json);
}

$array = array
       (
          'Name'=>'希亚',
          'Age'=>20
       );

echo JSON($array);
?>