2019PHP高薪工程师学习路线图....>>>
<?php
/*
* 文章内容分页类
*/
header("Content-type: text/html; charset=utf-8");
class cutpage {
private $pagestr; //被切分的内容
private $pagearr; //被切分文字的数组格式
private $sum_word; //总字数(UTF-8格式的中文字符也包括)
private $sum_page; //总页数
private $page_word; //一页多少字
private $cut_tag; //自动分页符
private $cut_custom; //手动分页符
private $page; //当前切分的页数,第几页
private $url;
function __construct($pagestr, $page_word = 6500) {
$this->page_word = $page_word;
$this->cut_tag = array("</table>", "</div>", "</p>", "<br/>", "”。", "。", ".", "!", "……", "?", ",");
$this->cut_custom = "{nextpage}";
if (intval(trim($_GET['page']))) {
$tmp_page = intval(trim($_GET['page']));
} else {
$tmp_page = 0;
}
$this->page = $tmp_page > 1 ? $tmp_page : 1;
$this->pagestr = $pagestr;
}
function cut_str() {
$str_len_word = strlen($this->pagestr);
//获取使用strlen得到的字符总数
$i = 0;
if ($str_len_word <= $this->page_word) { //如果总字数小于一页显示字数
$page_arr[$i] = $this->pagestr;
} else {
if (strpos($this->pagestr, $this->cut_custom)) {
$page_arr = explode($this->cut_custom, $this->pagestr);
} else {
$str_first = substr($this->pagestr, 0, $this->page_word);
//0-page_word个文字 cutStr为func.global中的函数
foreach ($this->cut_tag as $v) {
$cut_start = strrpos($str_first, $v);
//逆向查找第一个分页符的位置
if ($cut_start) {
$page_arr[$i++] = substr($this->pagestr, 0, $cut_start) . $v;
$cut_start = $cut_start + strlen($v);
break;
}
}
if (($cut_start + $this->page_word) >= $str_len_word) { //如果超过总字数
$page_arr[$i++] = substr($this->pagestr, $cut_start, $this->page_word);
} else {
while (($cut_start + $this->page_word) < $str_len_word) {
foreach ($this->cut_tag as $v) {
$str_tmp = substr($this->pagestr, $cut_start, $this->page_word); //取第cut_start个字后的page_word个字符
$cut_tmp = strrpos($str_tmp, $v); //找出从第cut_start个字之后,page_word个字之间,逆向查找第一个分页符的位置
if ($cut_tmp) {
$page_arr[$i++] = substr($str_tmp, 0, $cut_tmp) . $v;
$cut_start = $cut_start + $cut_tmp + strlen($v);
break;
}
}
}
//
if (($cut_start + $this->page_word) > $str_len_word) {
$page_arr[$i++] = substr($this->pagestr, $cut_start, $this->page_word);
}
}
}
}
$this->sum_page = count($page_arr); //总页数
$this->pagearr = $page_arr;
return $page_arr;
}
// //显示上一条,下一条
// function pagenav() {
// $this->set_url();
// $str = '';
// for ($i = 1;$i <= $this->sum_page;$i++) {
// if ($i == $this->page) {
// $str.= "<a href='#' class='cur'>" . $i . "</a> ";
// } else {
// $str.= "<a href='" . $this->url . $i . "'>" . $i . "</a> ";
// }
// }
// return $str;
// }
// function set_url() {
// parse_str($_SERVER["QUERY_STRING"], $arr_url);
// unset($arr_url["page"]);
// if (empty($arr_url)) {
// $str = "page=";
// } else {
// $str = http_build_query($arr_url) . "&page=";
// }
// $this->url = "http://" . $_SERVER["HTTP_HOST"] . $_SERVER["PHP_SELF"] . "?" . $str;
// }
}
?>