php 分页

<?php defined('BASEPATH') OR exit('No direct script access allowed');
/**
* CodeIgniter views Helpers
*
* @package		htdocs
* @subpackage	application
* @category	helpers
*/

/**
* 页码构造函数
*
* @param array $params
*
* @return string
*/
function pagers($params){
if(!$params['current']) $params['current'] = 1;
if(!$params['total']) $params['total'] = 1;
if($params['total'] < 1){
return '';
}

$prev = $params['current'] > 1?
'<a href="'.str_replace($params['token'],$params['current'] - 1, $params['link']).'" class="prev" title="上一页">«上一页</a>':
'<a href="javascript:" class="prev" title="上一页">«上一页</a>';

$next = $params['current'] < $params['total']?
'<a href="'.str_replace($params['token'], $params['current']+1, $params['link']).'" class="next last" title="下一页">下一页»</a>':
'<a href="javascript:" class="next" title="下一页">«下一页</a>';

//     if($params['type']=='mini'){
//         return <<<EOF
//     <div class="pager"><strong class="pagecurrent">{$params['current']}</strong><span class="line">/</span><span class="pageall">{$params['total']}</span>{$prev}{$next}</div>
// EOF;
//     }else{

$c = $params['current'];
$t = $params['total'];
$v = array();
$l = $params['link'];
$p = $params['token'];

// 仿JD page rule
if($t < 11){// $t是总页数,当总页数 > 11的时候
$v[] = pager_link(1, $t, $l, $p, $c); //pager_link 是构造分页的函数 pager_link( $from,$to,$link,$站位,$c当前页面 )
}else{
if($c < 6) {//当前页数<6,总页数>=11 eg:c=5,t=12 || 1 2 3 4 5c 6 7 ... 12
$v[] = pager_link(1, $c + 2, $l, $p, $c);//1 2 3 4 5c 6 7
$v[] = pager_link($t, $t, $l, $p);//12
} elseif($t - $c < 4) {//最后4页的时候 eg:c=11,t=12 || 1 ... 10 11c 12
$v[] = pager_link(1, 1, $l, $p);//1
$v[] = pager_link($c - 1, $t, $l, $p, $c);// 10 11c 12
} else {
// 为了适应700像素,小改动 前1 后2
//当c>=6  并且不是最后4页的时候 5,11   1..4567...11
$v[] = pager_link(1, 1, $l, $p);
$v[] = pager_link($c - 1, $c + 2, $l, $p, $c);
$v[] = pager_link($t, $t, $l, $p);
}
}
$links = implode('<b class="pn-break">...</b>',$v);

return <<<EOF
<span class="p-num">{$prev}{$links}{$next}</span>
EOF;
// }
}

/**
* 页码链接地址
*/
function pager_link($from,$to,$l,$p,$c=null){
for($i=$from;$i<$to+1;$i++){
if($c==$i){
$r[]='<a href="javascript:;" class="curr">'.$i.'</a>';
}else{
$r[]=' <a href="'.str_replace($p,$i,$l).'">'.$i.'</a> ';
}
}
return implode(' ',$r);
}

/**
* CI pager
*/
function ci_pager($params) {
$this->load->library('pagination');
return $this->pagination->initialize($params);
}

/**
* 截取字符串
*
* @param string $string
* @param int $length
* @param string $ext
*
* @param string $res
*/
function cut_str($string, $length, $ext = '...') {
$res = '';
if(!$length || $length < 1) return '';
if($string{$length+1}) {
$i = 0;
$vchar_num = 0;

while ($vchar_num < $length && $i < strlen($string)) {
$ord_char = ord($string{$i});

if($ord_char < 192) {
$res .= $string{$i};
$i++;
} elseif($ord_char < 224) {
$res .= $string{$i} . $string{$i + 1};
$i += 2;
} else {
$res .= $string{$i} . $string{$i + 1} . $string{$i + 2};
$i += 3;
}

$vchar_num++ ;
}
} else {
$res = $string;
}
if(!empty($ext) && $i && $string{$i}) $res .= $ext;
return $res;
}

/**
* 构造链接
*
* @param array $model
* @param array $before_params
* @param array $add_url_str
* @param string $target_blank //是否在当前页,不是则直需要重新构造@TODO
* jd,官网采用单页html格式,而采用友好链需解析后才能构造
*
* @return string
*/
function com_url($model, $before_params = array(), $add_url_str = array(), $target_blank = false) {
$new_url = '';
$site = site_url();

if(!$target_blank) {
$parse_url_arr = array();
$new_url .= $site;
if(!empty($model) && is_array($model)) {
$new_url .= implode('/', $model);
}
if(!empty($before_params) && is_array($before_params)) {
foreach ($before_params as $bk => &$bv) {
if(isset($add_url_str[$bk])) {
$bv = $add_url_str[$bk];
}
}
$new_url .= '/'.implode('/', $before_params).'/';
}
} else {
// @TODO
}
return $new_url;
}

/**
* 格式化数字
*
* 慎用此函数,前台购物车累计与接口提交计算有出入不一致时,影响,建议不知道接口计算规则
* 情况下不使用此函数
* @todo 汇率多国货币class
*
* @param number $number
* @param int $decimal
* @param string $operater
*
* @return number
*/
function format_number($number, $decimal, $operater = 'round') {
$bm = bcmul($number, pow(10, $decimal), $decimal);
$opres = call_user_func($operater, $bm);
$result = bcdiv($opres, pow(10, $decimal), $decimal);
return $result;
}

// 配置pagination
$token = time();
$current_checked['page'] = $token;
$page_params = array(
'current' => $current_page,
'total' => $list_select->TOTAL_PAGE,
'totallistnum' => $list_select->RECORD_COUNT,
'defaultListnum' => $page_size,
'pageLimit' => $page_size,
'link'=> com_url($this->data['c_m'], $current_checked, ''),
'token' => $token
);
$this->data['pager'] = $page_params;

<!--  page ***************************************************** -->
<? if ($pager): ?>
<div class="page clearfix">
<div id="J_bottomPage" class="p-wrap">
<!-- <span class="p-num">
<a class="pn-prev disabled">
<i><</i>
<span>上一页</span>
</a>
<a href="javascript:;" class="curr">1</a>
<a  href="javascript:;">2</a>
<a  href="javascript:;">3</a>
<a  href="javascript:;">4</a>
<a  href="javascript:;">5</a>
<b class="pn-break">...</b>
<a class="pn-next" href="javascript:;" title="使用方向键右键也可翻到下一页哦！">
<span>下一页</span>
<i>></i>
</a>
</span> -->
<?php echo pagers($pager); ?>
<span class="p-skip">
<input type="hidden" id="first_page_x" value="<? echo com_url($c_m, $current_checked, array('page' => 1)); ?>" />
<span>共<? echo $pager['total']; ?>页  到第</span>
<input id="p_j_num" class="input-txt" type="text" maxlength="4"  value="<? echo $current?$current:$pager['current']; ?>" onkeydown="javascript:if(event.keyCode==13){SEARCH.page_jump(100,1);return false;}"/>
<span>页</span>
<a class="btn btn-default" onclick="MGB.page_jump()" href="javascript:;">确定</a>
</span>
</div>
</div>
<? endif; ?>
<!--  *************************************************************page -->