PHP從練項(xiàng)目之?dāng)?shù)字分頁(yè)效果
Jun 13, 2016 pm 12:23 PM
PHP自練項(xiàng)目之?dāng)?shù)字分頁(yè)效果
學(xué)習(xí)要點(diǎn)：
1.LIMIT 用法
2.各種參數(shù)
3.超鏈接調(diào)用
第一：先在文件中設(shè)置數(shù)字分頁(yè)模塊；我的文件是（blog.php）
<span style="color: #008000;">//</span><span style="color: #008000;">分頁(yè)模塊</span><span style="color: #800080;">$_page</span> = <span style="color: #800080;">$_GET</span>['page'<span style="color: #000000;">];</span><span style="color: #800080;">$_pagesize</span> = 10<span style="color: #000000;">;</span><span style="color: #800080;">$_pagenum</span> = (<span style="color: #800080;">$_page</span> - 1) * <span style="color: #800080;">$_pagesize</span><span style="color: #000000;">;</span><span style="color: #008000;">//</span><span style="color: #008000;">首頁(yè)要得到所有的數(shù)據(jù)總和</span><span style="color: #800080;">$_num</span>=<span style="color: #008080;">mysql_num_rows</span>(_query("SELECT tg_id FROM tg_user"<span style="color: #000000;">));</span><span style="color: #800080;">$_pageabsolute</span>=<span style="color: #800080;">$_num</span> / <span style="color: #800080;">$_pagesize</span>;
要注意的是在數(shù)據(jù)庫(kù)中取集的時(shí)候
//我們必須每次重新讀取結(jié)果集，而不是從新去執(zhí)行SQL語(yǔ)句。
$_result = _query("SELECT tg_username,tg_sex,tg_face FROM tg_user ORDER BY tg_reg_time DESC LIMIT $_pagenum,$_pagesize");
設(shè)置分頁(yè)循環(huán)的效果
<span style="font-size: 16px;"><div id="page_num"> <ul> <?php <span style="color: #0000ff;">for(<span style="color: #800080;">$i</span>=0;<span style="color: #800080;">$i</span>$_pageabsolute;<span style="color: #800080;">$i</span>++<span style="color: #000000;">){ </span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$_page</span> == (<span style="color: #800080;">$i</span>+1<span style="color: #000000;">)) { </span><span style="color: #0000ff;">echo</span> '<li><a href="blog.php?page='.(<span%20style=" color:>$i+1).'" class="selected">'.(<span style="color: #800080;">$i</span>+1).'</a></li>'<span style="color: #000000;">; }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">echo</span> '<li><a href="blog.php?page='.(<span%20style=" color:>$i+1).'">'.(<span style="color: #800080;">$i</span>+1).'</a></li>'<span style="color: #000000;">; } } </span>?> </ul> </div></span>
相對(duì)應(yīng)的CSS
#page_num { height:20px; clear:both; padding:10px 0; position:relative;}#page_num ul { position:absolute; right:30px; height:20px;}#page_num ul li { float:left; width:26px; height:20px;}#page_num ul li a { display:block; width:20px; height:20px; line-height:20px; border:1px solid #333; text-align:center; text-decoration:none;}#page_num ul li a:hover,#page_num ul li a.selected { background:#666; font-weight:bold; color:#fff;} 
在其中可能會(huì)由于編碼出現(xiàn)容錯(cuò)誤，解決的方法是
<span style="font-size: 18px;"><span style="color: #008000;">//</span><span style="color: #008000;"> 分頁(yè)模塊</span><span style="color: #0000ff;">if</span> (<span style="color: #0000ff;">isset</span> ( <span style="color: #800080;">$_GET</span> ['page'<span style="color: #000000;">] )) { </span><span style="color: #008000;">//</span><span style="color: #008000;"> 在數(shù)據(jù)不再數(shù)據(jù)范圍內(nèi)出錯(cuò)的解決方法</span> <span style="color: #800080;">$_page</span> = <span style="color: #800080;">$_GET</span>['page'<span style="color: #000000;">]; </span><span style="color: #008000;">//</span><span style="color: #008000;"> 是否為空，是否小于0，是否不是數(shù)字。//如果其中有一個(gè)是，那么就=1</span> <span style="color: #0000ff;">if</span> (<span style="color: #0000ff;">empty</span> ( <span style="color: #800080;">$_page</span> )||<span style="color: #800080;">$_page</span> < 0 || !<span style="color: #008080;">is_numeric</span>( <span style="color: #800080;">$_page</span><span style="color: #000000;"> )) { </span><span style="color: #800080;">$_page</span> = 1<span style="color: #000000;">; } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> { </span><span style="color: #800080;">$_page</span> = <span style="color: #008080;">intval</span> ( <span style="color: #800080;">$_page</span> ); <span style="color: #008000;">//</span><span style="color: #008000;"> 如果是數(shù)字，但是小數(shù)，那么就$_page = intval($_page);轉(zhuǎn)換成整數(shù)</span><span style="color: #000000;"> }} </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> { </span><span style="color: #800080;">$_page</span> = 1<span style="color: #000000;">;}</span><span style="color: #800080;">$_pagesize</span> = 10<span style="color: #000000;">;</span><span style="color: #800080;">$_num</span> = _num_rows( _query ( "SELECT tg_id FROM tg_user"<span style="color: #000000;"> ) );</span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$_num</span>==0<span style="color: #000000;">) { </span><span style="color: #800080;">$_pageabsolute</span>=1<span style="color: #000000;">;}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #800080;">$_pageabsolute</span>=<span style="color: #008080;">ceil</span>(<span style="color: #800080;">$_num</span>/<span style="color: #800080;">$_pagesize</span><span style="color: #000000;">);}</span><span style="color: #008000;">//</span><span style="color: #008000;">當(dāng)頁(yè)碼大于總頁(yè)碼的時(shí)候，就會(huì)返回到總頁(yè)碼的最后一頁(yè)</span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$_page</span>><span style="color: #800080;">$_pageabsolute</span><span style="color: #000000;">) { </span><span style="color: #800080;">$_page</span>=<span style="color: #800080;">$_pageabsolute</span><span style="color: #000000;">;}</span><span style="color: #800080;">$_pagenum</span> = (<span style="color: #800080;">$_page</span> - 1) * <span style="color: #800080;">$_pagesize</span>;</span>?
? AI ??
Undress AI Tool
??? ???? ??
Undresser.AI Undress
???? ?? ??? ??? ?? AI ?? ?
AI Clothes Remover
???? ?? ???? ??? AI ?????.
Clothoff.io
AI ? ???
Video Face Swap
??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!
?? ??
??? ??
???++7.3.1
???? ?? ?? ?? ???
SublimeText3 ??? ??
??? ??, ???? ?? ????.
???? 13.0.1 ???
??? PHP ?? ?? ??
???? CS6
??? ? ?? ??
SublimeText3 Mac ??
? ??? ?? ?? ?????(SublimeText3)
??? ??
8638
17
1784
16
1729
56
1579
28
1444
31
PHP?? ?? ? ??? ????? ?????????
Jun 20, 2025 am 01:03 AM
TOSECURELYHANDLEAUSTENCENDACTIONANDACTERIZINGINPHP, FORCUCTSESTEPS : 1. ALWAYSHASHPASSWORTHPASSWORD_HASH () ? VERVERIFYUSINGPANSWORD_VERIFY (), usePREPAREDSTATEMENTSTOPREVENTSQLINGERGED, andSTOREUSERSESSEATAIN $ _SESSIONSAFTERLOGIN.2.impleplempletrole ?? ACCESSC
PHP?? ?? ???? ??? ??? ?? ? ? ???????
Jun 19, 2025 am 01:05 AM
PHP?? ?? ???? ???? ????? ??? ?? ??? ???? ?? ??? ??? ??? ???? ????. 1. finfo_file ()? ???? ?? ?? ??? ???? ???/jpeg? ?? ?? ?? ? ?????. 2. uniqid ()? ???? ??? ?? ??? ???? ? Web ?? ????? ??????. 3. php.ini ? html ??? ?? ?? ??? ???? ???? ??? 0755? ?????. 4. Clamav? ???? ???? ???? ??? ??????. ??? ??? ?? ???? ????? ???? ?? ??? ????? ???? ??? ? ??? ?????.
PHP?? == (??? ??)? === (??? ??)? ???? ??????
Jun 19, 2025 am 01:07 AM
PHP?? ==? ==? ?? ???? ?? ??? ??????. == ?? ??? ?? ?? ?????. ?? ??, 5 == "5"? true? ????, ?? ??? ???? ?? ?? ??? ????? ????? (? : 5 === "5"? false? ?????. ?? ?????? ===? ? ???? ?? ?????? == ?? ??? ??? ???? ?????.
php (, -, *, /, %)?? ?? ??? ??? ??????
Jun 19, 2025 pm 05:13 PM
PHP?? ?? ??? ??? ???? ??? ??? ????. 1. ?? ??? ?? ? ?? ??? ??? ???? ???? ??? ? ????. ??? ??? ???? ????? ????? ???? ????. 2. ?? ?? ?? - ??, ??? ???? ?? ??? ?????. 3. ?? ???? ??? ??? ???? ??? ??? ?????. 4. Division? / ??? ???? 0?? ??? ?? ????? ??? ?? ??? ?? ? ? ????. 5. ???? ??? ???? ?? ?? ? ?? ??? ???? ? ??? ? ???, ??? ?? ? ? ??? ??? ???? ?????. ? ???? ???? ???? ??? ??? ??? ???? ?? ??? ? ??????? ????.
PHP? NOSQL ?????? (? : MongoDB, Redis)? ??? ?? ??? ? ?????
Jun 19, 2025 am 01:07 AM
?, PHP? ?? ?? ?? ?????? ?? MongoDB ? Redis? ?? NOSQL ??????? ?? ??? ? ????. ?? MongoDBPHP ???? (PECL ?? Composer? ?? ??)? ???? ????? ????? ??? ?????? ? ???? ????? ??, ??, ?? ? ?? ??? ?????. ??, Predis ????? ?? Phpredis ??? ???? Redis? ???? ?? ? ?? ? ??? ???? ??? ????? Phpredis? ???? ?? Predis? ?? ??? ?????. ? ? ?? ??? ???? ? ????? ????.
?? PHP ?? ? ?? ??? ??? ?? ??? ??????
Jun 23, 2025 am 12:56 AM
tostaycurrentwithphpdevelopments ? bestpractices, followkeynewssources lifephp.netandphpweekly, adgytwithcommunitiesonforumsandconferences, readlingupdated andgrad indewfeatures, andreadorcontributetoopensourceproceprosts.first
PHP ? ???? ? ??? ? ??????
Jun 23, 2025 am 12:55 AM
phpbecamepupularforwebdevelopmentduetoiteofleneflening, whithhtml, wididepreadhostingsupport, andalargeecosystemincludingframeworkslikelaravelandcmsplatformsformslikewordpress.itexcelsinhandlingformsubmissions, managingussess, interptisussivers, ?? ???
PHP ???? ???? ???
Jun 25, 2025 am 01:00 AM
TOSETTHERIGHTTIMEZONEINPHP, usedate_default_timezone_set () functionattStartOfyourscriptwitHavalidInlifiersuchas'America/new_york'.1.edate_default_timezone_set () beforeanydate/timeFunctions.2
