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PHP function example that imitates Google paging effect

Dec 28, 2017 pm 03:48 PM
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本文主要介绍了PHP实现仿Google分页效果的分页函数,实例分析了php实现分页的相关技巧。希望对大家有所帮助。本文实例讲述了PHP实现仿Google分页效果的分页函数。分享给大家供大家参考。

具体如下:

/**
 * 分页函数
 * @param int $total  总页数
 * @param int $pagesize 每页几条
 * @param string $pkey url中页面变量名称
 * @param string $url  基础url,其中的{page}会被替换为页码
 * 依赖函数 request_uri httpInt
 */
function page($total,$pagesize=10,$pkey='p',$url=null){
  $a_num=10;
  $first=' 首页 ';
  $last=' 尾页 ';
  $pre=' 上页 ';
  $next=' 下页 ';
  $a_num=$a_num%2==0?$a_num+1:$a_num;
  if(!$url){
    $url=preg_replace("/&?{$pkey}=[^&]{0,}/", '',request_uri());
    $url=strpos($url, '?')===FALSE?$url.'?'.$pkey.'={page}':$url.'&'.$pkey.'={page}';
  }
  $pages=ceil($total/$pagesize);
  $curpage=httpInt($pkey,false,1);
  $curpage=$curpage>$pages||$curpage<=0?1:$curpage;//当前页超范围置为1
  $body=&#39;&#39;;$prefix=&#39;&#39;;$subfix=&#39;&#39;;
  $start=$curpage-($a_num-1)/2;//开始页
  $end=$curpage+($a_num-1)/2; //结束页
  $start=$start<=0?1:$start;  //开始页超范围修正
  $end=$end>$pages?$pages:$end;//结束页超范围修正
  if($pages>=$a_num){//总页数大于显示页数
    if($curpage<=($a_num-1)/2){$end=$a_num;}//当前页在左半边补右边
    if($end-$curpage<=($a_num-1)/2){$start-=5-($end-$curpage);}//当前页在右半边补左边
  }
  for($i=$start;$i<=$end;$i++){
     if($i==$curpage){
       $body.=&#39;<b>&#39;.$i.&#39;</b>&#39;;
     }else{
       $body.=&#39;<a href="&#39;.str_replace(&#39;{page}&#39;,$i,$url).&#39;"> &#39;.$i.&#39; </a>&#39;;
     }
  }
  $prefix=($curpage==1?&#39;&#39;:&#39;<a href="&#39;.str_replace(&#39;{page}&#39;,1,$url).&#39;">&#39;.$first.&#39;</a><a href="&#39;.str_replace(&#39;{page}&#39;,$curpage-1,$url).&#39;">&#39;.$pre.&#39;</a>&#39;);
  $subfix=($curpage==$pages?&#39;&#39;:&#39;<a href="&#39;.str_replace(&#39;{page}&#39;,$curpage+1,$url).&#39;">&#39;.$next.&#39;</a><a href="&#39;.str_replace(&#39;{page}&#39;,$pages,$url).&#39;">&#39;.$last.&#39;</a>&#39;);
  $info=" 第{$curpage}/{$pages}页 ";
  $go=&#39;<script>function ekup(){if(event.keyCode==13){clkyup();}}function clkyup(){if(!/\d+/.test(document.getElementById(\&#39;gsd09fhas9d\&#39;).value)){alert(\&#39;请输入页码!\&#39;);return;};location=\&#39;&#39;.$url.&#39;\&#39;.replace(/\\{page\\}/,document.getElementById(\&#39;gsd09fhas9d\&#39;).value);}</script><input onkeyup="ekup()" type="text" id="gsd09fhas9d" style="width:40px;vertical-align:text-baseline;padding:0 2px;font-size:10px;border:1px solid gray;"/> <span id="gsd09fhas9daa" onclick="clkyup();" style="cursor:pointer;text-decoration:underline;">转到</span>&#39;;
  return $prefix.$body.$subfix.$info.$go;
}
/**
 * 说明:获取 _SERVER[&#39;REQUEST_URI&#39;] 值的通用解决方案
 */
function request_uri()
{
  if (isset($_SERVER[&#39;REQUEST_URI&#39;]))
  {
    $uri = $_SERVER[&#39;REQUEST_URI&#39;];
  }
  else
  {
    if (isset($_SERVER[&#39;argv&#39;]))
    {
      $uri = $_SERVER[&#39;PHP_SELF&#39;] .&#39;?&#39;. $_SERVER[&#39;argv&#39;][0];
    }
    else
    {
      $uri = $_SERVER[&#39;PHP_SELF&#39;] .&#39;?&#39;. $_SERVER[&#39;QUERY_STRING&#39;];
    }
  }
  return $uri;
}
/**
 * 获取HTTP传递的整数
 * @param string $key 参数名称
 * @param bool $ispost 采取POST传递方式,默认为真http://blog.ddian.cn
 * @return 整数,非法时默认为 $default
 */
 function httpInt($key, $ispost=true,$default=0) {
   if ($ispost) {
     if (isset($_POST[$key])) {
       if (empty($_POST[$key])) {
         return $default;
       } else {
         $val = trim($_POST[$key]);
         if (preg_match("/^\-?\d+$/", $val)) return intval($val);
         else return $default;
       }
     } else {
       return $default;
     }
   } else {
     if (isset($_GET[$key])) {
       if (empty($_GET[$key])) {
         return $default;
       } else {
         $val = trim($_GET[$key]);
         if (preg_match("/^\-?\d+$/", $val)) {
           return intval($val);
         } else {
           return $default;
         }
       }
     } else {
       return $default;
     }
   }
}
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