


PHP implements paging: text paging and number paging,
Source: http://www.ido321.com/1086.html
Recently, paging is used in projects. The paging function is a frequently used function, so it is encapsulated in the form of a function.
<span>// 分页分装</span><span> <span>/**</span> <span>* $pageType 分页类型 1是数字分页 2是文本分页</span> <span>* 可以将$pageTotal,$page,$total等数据作为参数传递,或者在paging作为全局变量(推荐)</span> <span>*/</span> <span>function</span> paging($pageType) { <span>global</span> $pageTotal,$page,$total; <span>if</span>($pageType == 1) { <span>echo</span> <span>'<div id="pagenum">'</span>; <span>echo</span><span>'<ul>'</span>; <span>for</span>($i=0; $i < $pageTotal; $i++) { <span>if</span>($page == ($i+1)) { <span>echo</span> <span>'<li><a href="blogfriends.php?page='</span>.($i+1).<span>'" class="selected">'</span>.($i+1).<span>'</a></li>'</span>; } <span>else</span> { <span>echo</span> <span>'<li><a href="blogfriends.php?page='</span>.($i+1).<span>'">'</span>.($i+1).<span>'</a></li>'</span>; } } <span>echo</span><span>'</ul>'</span>; <span>echo</span><span>'</div>'</span>; } <span>else</span> <span>if</span>($pageType == 2) { <span>echo</span> <span>'<div id="pagetext">'</span>; <span>echo</span> <span>'<ul>'</span>; <span>echo</span> <span>'<li>'</span>.$page.<span>'/'</span>.$pageTotal.<span>'页 | </li>'</span>; <span>echo</span> <span>'<li>共有<strong>'</span>.$total .<span>'</strong>个会员 | </li>'</span>; <span>// 第一页</span> <span>if</span>($page == 1) { <span>echo</span> <span>'<li>首页 | </li>'</span>; <span>echo</span> <span>'<li>上一页 | </li>'</span>; } <span>else</span> { <span>// $_SERVER["SCRIPT_NAME"]获取当前的脚本名字,方便移植</span> <span>// 也可以自定义常量,常量值和脚本文件名一致</span> <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'">首页 </a>| </li>'</span>; <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($page - 1).<span>'">上一页 </a>| </li>'</span>; } <span>// 最后一页</span> <span>if</span>($page == $pageTotal) { <span>echo</span> <span>'<li>下一页 | </li>'</span>; <span>echo</span> <span>'<li>尾页 | </li>'</span>; } <span>else</span> { <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($page + 1).<span>'">下一页 </a>| </li>'</span>; <span>echo</span> <span>'<li><a href="'</span>.$_SERVER[<span>"SCRIPT_NAME"</span>].<span>'?page='</span>.($pageTotal).<span>'">尾页 </a>| </li>'</span>; } <span>echo</span> <span>'</ul>'</span>; <span>echo</span> <span>'</div>'</span>; } }</span>
Parameter explanation:
$pageTotal is the total number of pages, $page is the current page, $total is the total number of data obtained from the database;
For simplicity, all parameters are encapsulated
<span>// 分页参数分装</span><span> <span>/**</span> <span>* $sql 可以 获取数据总数的一个sql语句</span> <span>* $size 每一页显示条数</span> <span>*/</span> <span>function</span> pageParam($sql,$size) { <span>// 将所有涉及的参数设置全局变量</span> <span>// $pagestart 某一页从哪里开始</span> <span>// $total 总记录数 $page 某一页 $pageTotal 总页数</span> <span>global</span> $pagestart,$pagesize,$total,$page,$pageTotal; $pagesize = $size; <span>// 获取数据总数</span> $total = mysql_num_rows(queryDB($sql)); <span>// 错误处理,先判断是否存在</span> <span>if</span>(<span>isset</span>($_GET[<span>'page'</span>])) { <span>// 具体某一页</span> $page = $_GET[<span>'page'</span>]; <span>// 判断是否为空(0是空)/小于0/是否是数字</span> <span>if</span>(<span>empty</span>($page) || $page < 0 || !is_numeric($page)) { $page = 1; } <span>else</span> { $page = intval($page); <span>//取整,防止小数出现</span> } } <span>else</span> { <span>// 初始化显示第1页</span> $page = 1; } <span>// 数据库清零</span> <span>if</span>($total == 0) { <span>// 设置为1</span> $pageTotal = 1; } <span>else</span> { <span>// 分页的总页数(进一取整处理)</span> $pageTotal = ceil($total / $pagesize); } <span>// 页数大于总页码$total</span> <span>if</span>($page > $pageTotal) { $page = $pageTotal; } <span>// 当页从某一条记录开始</span> $pagestart = ($page - 1) * $pagesize; }</span>
Parameter explanation:
$pagestart is the page starting from a certain record, $pagesize is the number of records displayed on each page
In use, call pageParam first, then call paging
<span>/**</span><span> <span>* 第一个 可以 获取数据总数的一个sql语句</span> <span>* 第二个 每一页显示条数</span> <span>*/</span> pageParam(<span>"select userid from user"</span>,2);</span>
<span><?php <span>// 分页类型 1是数字分页 2是文本分页</span> paging(2); ?> </span>
The calling position is selected according to the specific situation. The text is paginated as follows:
<span><?php <span>// 分页类型 1是数字分页 2是文本分页</span> paging(1); ?> </span>
The digital pagination is as follows:
The style can be adjusted by yourself.
Next article: A small example of a map displayed by Google Maps API

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实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

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方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。


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