PHP分页类添加查询条件
请问分页类显示的页码怎么加入查询的条件,现在查询出来的页码链接都没有加上查询条件的
php分页类源码
<br><br><?php <br />//为了避免重复包含文件而造成错误,加了判断函数是否存在的条件:<br>@$page = $_GET['page'];<br>if(!function_exists('pageft')){<br>//定义函数pageft(),三个参数的含义为:<br>//$totle:信息总数;<br>//$displaypg:每页显示信息数,这里设置为默认是20;<br>//$url:分页导航中的链接,除了加入不同的查询信息“page”外的部分都与这个URL相同。<br>// 默认值本该设为本页URL(即$_SERVER["REQUEST_URI"]),但设置默认值的右边只能为常量,所以该默认值设为空字符串,在函数内部再设置为本页URL。<br>function pageft($totle,$displaypg=20,$shownum=0,$showtext=0,$showselect=0,$showlvtao=7,$url=''){<br><br>//定义几个全局变量:<br>//$page:当前页码;<br>//$firstcount:(数据库)查询的起始项;<br>//$pagenav:页面导航条代码,函数内部并没有将它输出;<br>//$_SERVER:读取本页URL“$_SERVER["REQUEST_URI"]”所必须。<br>global $page,$firstcount,$pagenav,$_SERVER;<br><br>//为使函数外部可以访问这里的“$displaypg”,将它也设为全局变量。注意一个变量重新定义为全局变量后,原值被覆盖,所以这里给它重新赋值。<br>$GLOBALS["displaypg"]=$displaypg;<br><br>if(!$page) $page=1;<br><br>//如果$url使用默认,即空值,则赋值为本页URL:<br>if(!$url){ $url=$_SERVER["REQUEST_URI"];}<br><br>//URL分析:<br>$parse_url=parse_url($url);<br>$url_query=$parse_url["query"]; //单独取出URL的查询字串<br>if($url_query){<br>//因为URL中可能包含了页码信息,我们要把它去掉,以便加入新的页码信息。<br>//这里用到了正则表达式,请参考“PHP中的正规表达式”<br>$url_query=ereg_replace("(^|&)page=$page","",$url_query);<br><br>//将处理后的URL的查询字串替换原来的URL的查询字串:<br>$url=str_replace($parse_url["query"],$url_query,$url);<br><br>//在URL后加page查询信息,但待赋值:<br>if($url_query) $url.="&page"; else $url.="page";<br>}else {<br>$url.="?page";<br>}<br><br>//页码计算:<br>$lastpg=ceil($totle/$displaypg); //最后页,也是总页数<br>$page=min($lastpg,$page);<br>$prepg=$page-1; //上一页<br>$nextpg=($page==$lastpg ? 0 : $page+1); //下一页<br>$firstcount=($page-1)*$displaypg;<br><br>//开始分页导航条代码:<br>if ($showtext==1){<br>$pagenav="<span>".($totle?($firstcount+1):0)."-".min($firstcount+$displaypg,$totle)."/$totle 记录</span><span>$page/$lastpg 页</span>";<br>}else{<br>$pagenav=""; <br>}<br>//如果只有一页则跳出函数:<br>if($lastpg<br>if($prepg) $pagenav.="<a>首页</a>"; else $pagenav.='<span>首页</span>';<br>if($prepg) $pagenav.="<a>上一页</a>"; else $pagenav.='<span>上一页</span>';<br>if ($shownum==1){<br> $o=$showlvtao;//中间页码表总长度,为奇数<br> $u=ceil($o/2);//根据$o计算单侧页码宽度$u<br> $f=$page-$u;//根据当前页$currentPage和单侧宽度$u计算出第一页的起始数字<br> //str_replace('{p}',,$fn)//替换格式<br> if($f $n=$lastpg;//总页数,20页<br> if($n if($page==1){<br> $pagenav.='<span>1</span>';<br> }else{<br> $pagenav.="<a>1</a>";<br> }<br> ///////////////////////////////////////<br> for($i=1;$i if($n $c=$f+$i;//从第$c开始累加计算<br> if($i==1 && $c>2){<br> $pagenav.='...';<br> }<br> if($c==1){continue;}<br> if($c==$n){break;}<br> if($c==$page){<br> $pagenav.='<span>'.$page.'</span>';<br> }else{<br> $pagenav.="<a>$c</a>";<br> }<br> if($i==$o && $c $pagenav.='...';<br> }<br> if($i>$n){break;}//当总页数小于页码表长度时 <br> }<br> if($page==$n && $n!=1){<br> $pagenav.='<span>'.$n.'</span>';<br> }else{<br> $pagenav.="<a>$n</a>";<br> }<br>}<br><br>if($nextpg) $pagenav.="<a>下一页</a>"; else $pagenav.='<span>下一页</span>';<br>if($nextpg) $pagenav.="<a>尾页</a>"; else $pagenav.='<span>尾页</span>';<div class="clear"> </div>

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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