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php广告加载类用法实例，php加载用法实例

WBOYOriginal: 2016-06-13 09:25:09924browse

php广告加载类用法实例，php加载用法实例

本文实例讲述了php广告加载类的用法，非常实用。分享给大家供大家参考。具体方法如下：

该php广告加载类，支持异步与同步加载。需要使用Jquery实现。

ADLoader.class.php类文件如下：

<&#63;php 
/** 广告加载管理类 
*  Date:  2013-08-04 
*  Author: fdipzone 
*  Ver:  1.0 
* 
*  Func: 
*  public load     加载广告集合 
*  public setConfig  广告配置 
*  private getAds    根据channel创建广告集合 
*  private genZoneId  zoneid base64_encode 处理 
*  private genHtml   生成广告html 
*  private checkBrowser 检查是否需要同步加载的浏览器 
*/ 
 
class ADLoader{ // class start 
 
  private static $_ads = array();   // 广告集合 
  private static $_step = 300;    // 广告加载间隔 
  private static $_async = true;   // 是否异步加载 
  private static $_config = array(); // 广告设置文件 
  private static $_jsclass = null;  // 广告JS class 
 
 
  /** 加载广告集合 
  * @param String $channel 栏目,对应config文件 
  * @param int   $step  广告加载间隔 
  * @param boolean $async  是否异步加载 
  */ 
  public static function load($channel='', $step='', $async=''){ 
    if(isset($step) && is_numeric($step) && $step>0){ 
      self::$_step = $step; 
    } 
 
    if(isset($async) && is_bool($async)){ 
      self::$_async = $async; 
    } 
 
    // 判断浏览器,如IE强制使用同步加载 
    if(!self::checkBrowser()){ 
      self::$_async = false; 
    } 
 
    self::getAds($channel); 
    self::genZoneId(); 
 
    return self::genHtml(); 
  } 
 
  /** 设置config 
  * @param String $config 广告配置 
  * @param String $jsclass js class文件路径 
  */ 
  public static function setConfig($config=array(), $jsclass=''){ 
    self::$_config = $config; 
    self::$_jsclass = $jsclass; 
  } 
 
 
  /** 根据channel创建广告集合 
  * @param String $channel 栏目 
  */ 
  private static function getAds($channel=''){ 
    $AD_Config = self::$_config; 
    if($AD_Config!=null){ 
      self::$_ads = isset($AD_Config[$channel])&#63; $AD_Config[$channel] : $AD_Config['default']; 
    } 
  } 
 
  /** zoneid base64_encode 处理 */ 
  private static function genZoneId(){ 
 
    // 同步加载广告不需要处理zoneid 
    if(!self::$_async){ 
      return ; 
    } 
 
    $ads = self::$_ads; 
    for($i=0,$len=count($ads); $i<$len; $i++){ 
      if(isset($ads[$i]['zoneId'])){ 
        $ads[$i]['zoneId'] = base64_encode('var zoneid='.$ads[$i]['zoneId'].';'); 
      } 
    } 
    self::$_ads = $ads; 
  } 
 
  /** 生成广告html */ 
  private static function genHtml(){ 
    $ads = self::$_ads; 
    $html = array(); 
    if(self::$_jsclass!=null && $ads){ 
      array_push($html, '<script type="text/javascript" src="'.self::$_jsclass.'"></script>'); 
 
      // 同步需要预先加载 
      if(!self::$_async){ 
        foreach($ads as $ad){ 
          array_push($html, '<div id="'.$ad['domId'].'_container" style="display:none">'); 
          array_push($html, '<script type="text/javascript">'); 
          array_push($html, 'ADLoader.preload('.json_encode($ad).');'); 
          array_push($html, '</script>'); 
          array_push($html, '</div>'); 
        } 
      } 
 
      array_push($html, '<script type="text/javascript">'); 
      array_push($html, 'var ads='.json_encode($ads).';'); 
      array_push($html, '$(document).ready(function(){ ADLoader.load(ads, '.self::$_step.', '.intval(self::$_async).'); });'); 
      array_push($html, '</script>'); 
    } 
    return implode("\r\n", $html); 
  } 
 
  /** 判断是否需要强制同步加载的浏览器 */ 
  private static function checkBrowser(){ 
    $user_agent = $_SERVER['HTTP_USER_AGENT']; 
    if(strstr($user_agent,'MSIE')!=''){ 
      return false; 
    } 
    return true; 
  } 
 
} // class end 
&#63;>

ADConfig.php文件如下：

<&#63;php 
/** 广告配置文件 **/ 
 
return array( 
 
  'case_openx' => array( 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_728x90', 
      'zoneId' => 452 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_300x250', 
      'zoneId' => 449 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_l2_300x250', 
      'zoneId' => 394 
    ), 
  ), 
 
  'case_url' => array( 
    array( 
      'type' => 'url', 
      'domId' => 'ad_728x90', 
      'url' => 'adurl.php&#63;zoneid=452' 
    ), 
    array( 
      'type' => 'url', 
      'domId' => 'ad_300x250', 
      'url' => 'adurl.php&#63;zoneid=449' 
    ), 
    array( 
      'type' => 'url', 
      'domId' => 'ad_l2_300x250', 
      'url' => 'adurl.php&#63;zoneid=394' 
    ) 
  ), 
 
  'case_sync_openx' => array( 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_728x90', 
      'zoneId' => 452 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_300x250', 
      'zoneId' => 449 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_l2_300x250', 
      'zoneId' => 394 
    ), 
  ), 
 
  'default' => array( 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_728x90', 
      'zoneId' => 452 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_300x250', 
      'zoneId' => 449 
    ), 
    array( 
      'type' => 'openx', 
      'domId' => 'ad_l2_300x250', 
      'zoneId' => 394 
    ), 
  ), 
 
); 
 
&#63;>

ADLoader.js文件如下：

/** 异步加载广告 
*  Date:  2013-08-04 
*  Author: fdipzone 
*  Ver:  1.0 
*/ 
var ADLoader = (function(){ 
 
  var _ads = [],   // 广告集合 
    _step = 300,  // 广告加载间隔 
    _async = true, // 是否异步加载 
    _loaded = 0;  // 已经加载的广告数 
   
  /** loadAd 循环加载广告 
  * @param int c 第几个广告 
  */ 
  function loadAD(c){ 
    if(_loaded>=_ads.length){ 
      return ; 
    } 
 
    if($('#'+_ads[c].domId).length>0){ // 判断dom是否存在 
 
      if(_async){ // 异步执行 
 
        crapLoader.loadScript(getScript(_ads[c]), _ads[c].domId, { 
          success: function(){ 
            completeAd(); 
          } 
        }); 
       
      }else{ // 将同步加载的广告显示 
 
        var ad_container = $('#'+_ads[c].domId+'_container'); 
        ad_container.find('embed').attr('wmode','transparent').end().find('object').each(function(k, v){ 
          v.wmode = 'transparent'; // 将flash变透明 
        }); 
        $('#'+_ads[c].domId)[0].appendChild(ad_container[0]); 
        ad_container.show(); 
         
        completeAd(); 
      } 
    }else{ // dom不存在 
      completeAd(); 
    } 
  } 
 
  /** 加载完广告后处理 */ 
  function completeAd(){ 
    _loaded ++; 
    setTimeout(function(){ 
      loadAD(_loaded); 
    }, _step);     
  } 
 
  /** 获取广告 
  * @param Array ad 广告参数 
  */ 
  function getScript(ad){ 
    var ret = null; 
 
    switch(ad.type){ 
      case 'openx': // openx code ad 
        ret = 'data:text/javascript;base64,' + ad.zoneId + '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'; 
        break; 
       
      case 'url': // url ad 
        ret = ad.url; 
        break; 
    } 
    return ret; 
  } 
 
  /** 同步加载广告 
  * @param Array ad 广告参数 
  */ 
  function writeAd(ad){ 
    switch(ad.type){ 
      case 'openx': 
        var m3_u = (location.protocol=='https:'&#63;'https://ads.nmg.com.hk/www/delivery/ajs.php':'http://ads.nmg.com.hk/www/delivery/ajs.php'); 
        var m3_r = Math.floor(Math.random()*99999999999); 
        if (!document.MAX_used) document.MAX_used = ','; 
        document.write ("<scr"+"ipt type='text/javascript' src='"+m3_u); 
        document.write ("&#63;zoneid=" + ad.zoneId); 
        document.write ('&cb=' + m3_r); 
        if (document.MAX_used != ',') document.write ("&exclude=" + document.MAX_used); 
        document.write (document.charset &#63; '&charset='+document.charset : (document.characterSet &#63; '&charset='+document.characterSet : '')); 
        document.write ("&loc=" + escape(window.location)); 
        if (document.referrer) document.write ("&referer=" + escape(document.referrer)); 
        if (document.context) document.write ("&context=" + escape(document.context)); 
        if (document.mmm_fo) document.write ("&mmm_fo=1"); 
        document.write ("'><\/scr"+"ipt>"); 
        break; 
       case 'url': 
        document.write ('<script type="text/javascript" src="' + ad.url + '"></script>'); 
        break; 
    } 
  } 
 
  obj = { 
 
    /** 加载广告 
    * @param Array  ads  广告集合 
    * @param int   step 广告加载间隔 
    * @param boolean async true:异步加载 false:同步加载 
    */ 
    load: function(ads, step, async){ 
      _ads = ads; 
 
      if(typeof(step)!='undefined'){ 
        _step = step; 
      } 
 
      if(typeof(async)!='undefined'){ 
        _async = async; 
      } 
 
      loadAD(_loaded); 
    }, 
 
    /** 预加载广告 */ 
    preload: function(ad){ 
      if($('#'+ad.domId).length>0){  // 判断dom是否存在 
        writeAd(ad); 
      } 
    } 
  } 
  return obj; 
 
}()); 
 
/* crapLoader */ 
var crapLoader = (function() { 
   
  var isHijacked = false, 
    queue = [], 
    inputBuffer = [], 
    writeBuffer = {}, 
    loading = 0, 
    elementCache = {}, 
    returnedElements = [], 
    splitScriptsRegex = /(<script[\s\S]*&#63;<\/script>)/gim, 
    globalOptions = { 
      autoRelease: true, 
      parallel: true, 
      debug: false 
    }, 
    defaultOptions = { 
      charset: undefined, 
      success: undefined, 
      func: undefined, 
      src: undefined, 
      timeout: 3000 
    },publ, 
    head = document.getElementsByTagName("head")[0] || document.documentElement, 
    support = { 
      scriptOnloadTriggeredAccurately: false, 
      splitWithCapturingParentheses: ("abc".split(/(b)/)[1]==="b") 
    }; 
   
  function checkQueue () { 
    if(queue.length) { 
      loadScript( queue.shift() ); 
    } else if(loading === 0 && globalOptions.autoRelease) { 
      debug("Queue is empty. Auto-releasing."); 
      publ.release(); 
    } 
  } 
 
  function checkWriteBuffer (obj) { 
    var buffer = writeBuffer[obj.domId], 
      returnedEl; 
 
    if(buffer && buffer.length) { 
      writeHtml( buffer.shift(), obj ); 
 
    } else { 
      while (returnedElements.length > 0) { 
        returnedEl = returnedElements.pop(); 
        var id = returnedEl.id; 
        var elInDoc = getElementById(id); 
        if (!elInDoc) { continue; } 
        var parent = elInDoc.parentNode; 
        elInDoc.id = id + "__tmp"; 
        parent.insertBefore(returnedEl, elInDoc); 
        parent.removeChild(elInDoc); 
      } 
      finished(obj); 
    } 
  } 
 
  function debug (message, obj) { 
    if(!globalOptions.debug || !window.console) { return; } 
    var objExtra = ""; 
    if(obj) { 
      objExtra = "#"+obj.domId+" "; 
      var depth = obj.depth; 
      while(depth--) { objExtra += "  "; } 
    } 
    console.log("crapLoader " + objExtra + message); 
  } 
 
  function extend (t, s) { 
    var k; 
    if(!s) { return t; } 
    for(k in s) { 
      t[k] = s[k]; 
    } 
    return t; 
  } 
 
  function finished (obj) { 
    if(obj.success && typeof obj.success === "function") { 
      obj.success.call( document.getElementById(obj.domId) ); 
    } 
    checkQueue(); 
  } 
 
  function flush (obj) { 
    var domId = obj.domId, 
      outputFromScript, 
      htmlPartArray; 
 
    outputFromScript = stripNoScript( inputBuffer.join("") ); 
    inputBuffer = []; 
 
    htmlPartArray = separateScriptsFromHtml( outputFromScript ); 
 
    if(!writeBuffer[domId]) { 
      writeBuffer[domId] = htmlPartArray; 
    } else { 
      Array.prototype.unshift.apply(writeBuffer[domId], htmlPartArray); 
    } 
    checkWriteBuffer(obj); 
  } 
 
  function getCachedElById (domId) { 
    return elementCache[domId] || (elementCache[domId] = document.getElementById(domId)); 
  } 
 
  function getElementById (domId) { 
    return ( publ.orgGetElementById.call &#63; 
      publ.orgGetElementById.call(document, domId) : 
      publ.orgGetElementById(domId) ); 
  } 
 
  function getElementByIdReplacement (domId) { 
    var el = getElementById(domId), 
      html, frag, div, found; 
 
    function traverseForElById(domId, el) { 
      var children = el.children, i, l, child; 
      if(children && children.length) { 
        for(i=0,l=children.length; i<l; i++) { 
          child = children[i]; 
          if(child.id && child.id === domId) { return child; } 
          if(child.children && child.children.length) { 
            var tmp = traverseForElById(domId, child); 
            if (tmp) return tmp; 
          } 
        } 
      } 
    } 
 
    function searchForAlreadyReturnedEl(domId) { 
      var i, l, returnedEl; 
      for(i=0,l=returnedElements.length; i<l; i++) { 
        returnedEl = returnedElements[i]; 
        if(returnedEl.id === domId) { return returnedEl; } 
      } 
    } 
 
    if(el) { return el; } 
 
    if (returnedElements.length) { 
      found = searchForAlreadyReturnedEl(domId); 
      if (found) { 
        return found; 
      } 
    } 
 
    if(inputBuffer.length) { 
      html = inputBuffer.join(""); 
      frag = document.createDocumentFragment(); 
      div = document.createElement("div"); 
      div.innerHTML = html; 
      frag.appendChild(div); 
      found = traverseForElById(domId, div); 
      if (found) { 
        returnedElements.push(found); 
      } 
      return found; 
    } 
  } 
 
  var globalEval = (function () { 
    return (window.execScript &#63; function(code, language) { 
      window.execScript(code, language || "JavaScript"); 
    } : function(code, language) { 
      if(language && !/^javascript/i.test(language)) { return; } 
      window.eval.call(window, code); 
    }); 
  }()); 
 
  function isScript (html) { 
    return html.toLowerCase().indexOf("<script") === 0; 
  } 
 
  function runFunc (obj) { 
    obj.func(); 
    obj.depth++; 
    flush(obj); 
  } 
 
  function loadScript (obj) { 
    loading++; 
    // async loading code from jQuery 
    var script = document.createElement("script"); 
    if(obj.type) { script.type = obj.type; } 
    if(obj.charset) { script.charset = obj.charset; } 
    if(obj.language) { script.language = obj.language; } 
 
    logScript(obj); 
 
    var done = false; 
    // Attach handlers for all browsers 
    script.onload = script.onreadystatechange = function() { 
      loading--; 
      script.loaded = true; 
      if ( !done && (!this.readyState || 
          this.readyState === "loaded" || this.readyState === "complete") ) { 
        done = true; 
        script.onload = script.onreadystatechange = null; 
        debug("onload " + obj.src, obj); 
        flush(obj); 
      } 
    }; 
 
    script.loaded = false; 
    script.src = obj.src; 
    obj.depth++; 
 
    // Use insertBefore instead of appendChild to circumvent an IE6 bug. 
    // This arises when a base node is used (#2709 and #4378). 
    head.insertBefore( script, head.firstChild ); 
    setTimeout(function() { 
      if(!script.loaded) { throw new Error("SCRIPT NOT LOADED: " + script.src); } 
    }, obj.timeout); 
  } 
 
  function logScript (obj, code, lang) { 
    debug((code &#63; 
      "Inline " + lang + ": " + code.replace("\n", " ").substr(0, 30) + "..." : 
      "Inject " + obj.src), obj); 
  } 
 
  function separateScriptsFromHtml (htmlStr) { 
    return split(htmlStr, splitScriptsRegex); 
  } 
 
  function split (str, regexp) { 
    var match, prevIndex=0, tmp, result = [], i, l; 
 
    if(support.splitWithCapturingParentheses) { 
      tmp = str.split(regexp); 
    } else { 
      // Cross browser split technique from Steven Levithan 
      // http://blog.stevenlevithan.com/archives/cross-browser-split 
      tmp = []; 
      while(match = regexp.exec(str)) { 
        if(match.index > prevIndex) { 
          result.push(str.slice(prevIndex, match.index)); 
        } 
 
        if(match.length > 1 && match.index < str.length) { 
          Array.prototype.push.apply(tmp, match.slice(1)); 
        } 
 
        prevIndex = regexp.lastIndex; 
      } 
 
      if(prevIndex < str.length) { 
        tmp.push(str.slice(prevIndex)); 
      } 
 
    } 
 
    for(i=0, l=tmp.length; i<l; i=i+1) { 
      if(tmp[i]!=="") { result.push(tmp[i]); } 
    } 
    return result; 
  } 
 
  function stripNoScript (html) { 
    return html.replace(/<noscript>[\s\S]*&#63;<\/noscript>/ig, ""); 
  } 
 
  function trim (str) { 
    if(!str) { return str; } 
    return str.replace(/^\s*|\s*$/gi, ""); 
  } 
 
  function writeHtml (html, obj) { 
    if( isScript(html) ) { 
      var dummy = document.createElement("div"); 
      dummy.innerHTML = "dummy<div>" + html + "</div>"; // trick for IE 
      var script = dummy.children[0].children[0]; 
      var lang = script.getAttribute("language") || "javascript"; 
      if(script.src) { 
        obj.src = script.src; 
        obj.charset = script.charset; 
        obj.language = lang; 
        obj.type = script.type; 
        loadScript(obj); 
      } else { 
        var code = trim( script.text ); 
        if(code) { 
          logScript( obj, code, lang); 
          globalEval( code, lang); 
        } 
        flush(obj); 
      } 
    } else { 
      var container = getCachedElById(obj.domId); 
      if(!container) { 
        throw new Error("crapLoader: Unable to inject html. Element with id '" + obj.domId + "' does not exist"); 
      } 
       
      html = trim(html); // newline before <object> cause weird effects in IE 
      if(html) { 
        container.innerHTML += html; 
      } 
      checkWriteBuffer(obj); 
    } 
  } 
 
  function writeReplacement (str) { 
    inputBuffer.push(str); 
    debug("write: " + str); 
  } 
 
  function openReplacement () { 
    // document.open() just returns the document when called from a blocking script: 
    // http://www.whatwg.org/specs/web-apps/current-work/#dom-document-open 
    return document; 
  } 
 
  function closeReplacement () { 
    // document.close() does nothing when called from a blocking script: 
    // http://www.whatwg.org/specs/web-apps/current-work/#dom-document-close 
  } 
 
  publ = { 
    hijack: function(options) { 
      if(isHijacked) { return; } 
      isHijacked = true; 
      extend(globalOptions, options); 
      if(globalOptions.parallel && !support.scriptOnloadTriggeredAccurately) { 
        globalOptions.parallel = false; 
        debug("Browsers onload is not reliable. Disabling parallel loading."); 
      } 
 
      document.write = document.writeln = writeReplacement; 
      document.open = openReplacement; 
      document.close = closeReplacement; 
      document.getElementById = getElementByIdReplacement; 
    }, 
 
    release: function() { 
      if(!isHijacked) { return; } 
      isHijacked = false; 
      document.write = this.orgWrite; 
      document.writeln = this.orgWriteLn; 
      document.open = this.orgOpen; 
      document.close = this.orgClose; 
      document.getElementById = this.orgGetElementById; 
      elementCache = {}; 
    }, 
 
    handle: function(options) { 
      if(!isHijacked) { 
        debug("Not in hijacked mode. Auto-hijacking."); 
        this.hijack(); 
      } 
      var defaultOptsCopy = extend({}, defaultOptions); 
      var obj = extend(defaultOptsCopy, options); 
      obj.depth = 0; 
 
      if (!obj.domId) { 
        obj.domId = "craploader_" + new Date().getTime(); 
        var span = document.createElement("span"); 
        span.id = obj.domId; 
        document.body.appendChild(span); 
      } 
 
      if (options.func) { 
        runFunc(obj); 
        return; 
      } 
 
      if(globalOptions.parallel) { 
        setTimeout(function() { 
          loadScript(obj); 
        }, 1); 
      } else { 
        queue.push(obj); 
        setTimeout(function() { 
          if(loading === 0) { 
            checkQueue(); 
          } 
        }, 1); 
      } 
    }, 
 
    loadScript: function(src, domId, options) { 
      if (typeof domId !== "string") { 
        options = domId; 
        domId = undefined; 
      } 
      this.handle(extend({ 
        src:  src, 
        domId: domId 
      }, options)); 
    }, 
 
    runFunc: function(func, domId, options) { 
      if (typeof domId !== "string") { 
        options = domId; 
        domId = undefined; 
      } 
      this.handle( extend({ 
        domId: domId, 
        func:   func 
      }, options) ); 
    }, 
 
    orgGetElementById  : document.getElementById, 
    orgWrite      : document.write, 
    orgWriteLn     : document.writeln, 
    orgOpen       : document.open, 
    orgClose      : document.close, 
    _olt        : 1, 
    _oltCallback    : function() { 
      support.scriptOnloadTriggeredAccurately = (publ._olt===2); 
    } 
  }; 
 
  return publ; 
}());

demo.php示例程序如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
 <head> 
 <meta http-equiv="content-type" content="text/html; charset=utf-8"> 
 <title> AD Loader </title> 
 <style type="text/css"> 
 .banner1{margin:10px; border:1px solid #CCCCCC; width:728px; height:90px;} 
 .banner2{margin:10px; border:1px solid #CCCCCC; width:300px; height:250px;} 
 </style> 
 <script type="text/javascript" src="http://code.jquery.com/jquery-1.10.1.min.js"></script> 
 </head> 
 
 <body> 
 <div class="banner1" id="ad_728x90"></div> 
 <div class="banner2" id="ad_300x250"></div> 
 <div class="banner2" id="ad_l2_300x250"></div> 
   
 <&#63;php 
  function showAD($channel='', $step='', $async=''){ 
   include('ADLoader.class.php'); 
   $ad_config = include('ADConfig.php'); 
   ADLoader::setConfig($ad_config, 'ADLoader.js'); 
   return ADLoader::load($channel, $step, $async); 
  } 
 
  echo showAD('case_openx'); // 异步加载 
  //echo showAD('case_url');  // url方式异步加载 
  //echo showAD('case_sync_openx', 300, false); // 同步加载 
 &#63;> 
 
 </body> 
</html>

adurl.php文件如下：

<&#63;php
$zoneid = isset($_GET['zoneid'])&#63; intval($_GET['zoneid']) : 0; 
if($zoneid){ 
&#63;> 
var zoneid = <&#63;=$zoneid &#63;>; 
var m3_u = (location.protocol=='https:'&#63;'https://ads.nmg.com.hk/www/delivery/ajs.php':'http://ads.nmg.com.hk/www/delivery/ajs.php'); 
var m3_r = Math.floor(Math.random()*99999999999); 
if (!document.MAX_used) document.MAX_used = ','; 
document.write ("<scr"+"ipt type='text/javascript' src='"+m3_u); 
document.write ("&#63;zoneid=" + zoneid); 
document.write ('&cb=' + m3_r); 
if (document.MAX_used != ',') document.write ("&exclude=" + document.MAX_used); 
document.write (document.charset &#63; '&charset='+document.charset : (document.characterSet &#63; '&charset='+document.characterSet : '')); 
document.write ("&loc=" + escape(window.location)); 
if (document.referrer) document.write ("&referer=" + escape(document.referrer)); 
if (document.context) document.write ("&context=" + escape(document.context)); 
if (document.mmm_fo) document.write ("&mmm_fo=1"); 
document.write ("'><\/scr"+"ipt>"); 
<&#63; } &#63;>

本文所述完整实例源码点击此处本站下载。

希望本文所述对大家的php程序设计有所帮助。

php中类的用法

class myclass
{
function showerror($msg)
{
$msg=trim($msg);
echo "

这个。。。。貌似实现不了
不知道你具体要做什么
你还是在类中实例那个对象的类好了
class a
{
function say()
{
echo 'b';
}
}

class b
{
function test()
{
$a = new a();
$a->say();
}
}

$b = new b();
$b->test();

你的pdo对象应该在整个项目都是不变的吧？你想调用已经实例化的对象的话一般数据库类是个单例模式。
比如这样
你的pdo类中加上这个单例模式方法
class database
{
private static $_instance;

public static function getInstance()
{
if(!isset(self::$_instance))
{
self::$_instance = new self();
}
return self::$_instance;
}
}

然后在你的登录类里面直接调用这个类的这个方法
如果已经实例化了就用原来那个对象，没有的话重新生成这个对象。

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php中类的用法

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