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ÕâÀïÌØ±ð×¢ÒâµÄÊÇ,ÅжÏÊÇ·ñÏàµÈÊÇ==¶ø²»ÊÇ=,ASP³ÌÐòÔ±¿ÉÄܳ£·¸Õâ¸ö´íÎó,= ÊǸ³Öµ.
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if ($state==1) {
echo "¹þ¹þ ;
echo "br" ;
}
µÚÁ½ÖÖÊdzýÁË if Ö®Íâ,¼ÓÉÏÁË else µÄÌõ¼þ,¿É½âÊÍ³É "Èô·¢ÉúÁËijÊÂÔòÔõÑù´¦Àí,·ñÔò¸ÃÈçºÎ½â¾ö".Óï·¨ÈçÏÂ
echo "¹þ¹þ" ;
echo "br";
else{
echo "ºÇºÇ";
µÚÈýÖÖ¾ÍÊǵݹéµÄ if..else Ñ»·,ͨ³£ÓÃÔÚ¶àÖÖ¾ö²ßÅжÏʱ.Ëü½«Êý¸ö if..else ÄÃÀ´ºÏ²¢ÔËÓô¦Àí.
Ö±½Ó¿´ÏÂÃæµÄÀý×Ó
if ( $a $b ) {
echo "a ±È b ´ó" ;
} elseif ( $a == $b ) {
echo "a µÈÓÚ b" ;
} else {
echo "a ±È b С" ;
ÉÏÀýÖ»Óöþ²ãµÄ if..else Ñ»·,ÓÃÀ´±È½Ï a ºÍ b Á½¸ö±äÁ¿.ʵ¼ÊҪʹÓÃÕâÖֵݹé if..else Ñ»·Ê±,ÇëСÐÄʹÓÃ,ÒòΪ̫¶à²ãµÄÑ»·ÈÝÒ×ʹÉè¼ÆµÄÂß¼³öÎÊÌâ,»òÕßÉÙ´òÁË´óÀ¨ºÅµÈ,¶¼»áÔì³É³ÌÐò³öÏÖĪÃûÆäÃîµÄÎÊÌâ.
ÏÂÀýÊÇÓà for Ñ»·Ð´µÄµÄÀý×Ó.
for ( $i = 1 ; $i = 10 ; $i ¡ô¡ô) {
echo "ÕâÊǵÚ".$i."´ÎÑ»·br" ;
Óï·¨ÈçÏÂ
ÆäÖÐµÄ expr Ìõ¼þ,ͨ³£Îª±äÁ¿Ãû³Æ.¶ø case ºóµÄ exprN,ͨ³£±íʾ±äÁ¿Öµ.ðºÅºóÔòΪ·ûºÏ¸ÃÌõ¼þÒªÖ´ÐеIJ¿·Ö.×¢ÒâÒªÓà break ÌøÀëÑ»·.
switch ( date ( "D" )) {
case "Mon" :
echo "½ñÌìÐÇÆÚÒ»" ;
break;
case "Tue" :
echo "½ñÌìÐÇÆÚ¶þ" ;
case "Wed" :
echo "½ñÌìÐÇÆÚÈý" ;
case "Thu" :
echo "½ñÌìÐÇÆÚËÄ" ;
case "Fri" :
echo "½ñÌìÐÇÆÚÎå" ;
default:
echo "½ñÌì·Å¼Ù" ;
ÕâÀïÐèҪעÒâµÄÊÇbreak;±ðÒÅ©ÁË,default,Ê¡ÂÔÊÇ¿ÉÒÔµÄ.
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ÏÂÃæËµÒ»ÏÂËüµÄʹÓÃ.
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ÔÚÊý¾Ý¿â shop Öд´½¨Ò»¸öбí :
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PHP¼òÖ±¾ÍÊÇÒ»¸öº¯Êý¿â,·á¸»µÄº¯ÊýʹPHPµÄijЩµØ·½Ï൱¼òµ¥.½¨Òé´ó¼ÒdownÒ»±¾PHPµÄº¯ÊýÊÖ²á,×ÜÓõĵ½.
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¢Ù.¡¢mysql_connect
´ò¿ª MySQL ·þÎñÆ÷Á¬½Ó.
Óï·¨: int mysql_connect(string [hostname] [:port], string [username], string [password]); ·µ»ØÖµ: ÕûÊý
±¾º¯Êý½¨Á¢Óë MySQL ·þÎñÆ÷µÄÁ¬½Ó.ÆäÖÐËùÓеIJÎÊý¶¼¿ÉÊ¡ÂÔ.µ±Ê¹Óñ¾º¯ÊýÈ´²»¼ÓÈκβÎÊýʱ,²ÎÊý hostname µÄĬÈÏֵΪ localhost¡¢²ÎÊý username µÄĬÈÏֵΪ PHP Ö´ÐÐÐг̵ÄÓµÓÐÕß¡¢²ÎÊý password ÔòΪ¿Õ×Ö·û´® (¼´Ã»ÓÐÃÜÂë).¶ø²ÎÊý hostname ºóÃæ¿ÉÒÔ¼ÓðºÅÓë¶Ë¿ÚºÅ,´ú±íʹÓÃÄĸö¶Ë¿ÚÓë MySQL Á¬½Ó.µ±È»ÔÚʹÓÃÊý¾Ý¿âʱ,ÔçµãʹÓà mysql_close() ½«Á¬½Ó¹Øµô¿ÉÒÔ½ÚÊ¡×ÊÔ´.
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±¾º¯ÊýÑ¡Ôñ MySQL ·þÎñÆ÷ÖеÄÊý¾Ý¿âÒÔ¹©Ö®ºóµÄ×ÊÁϲéѯ×÷Òµ (query) ´¦Àí.³É¹¦·µ»Ø true,ʧ°ÜÔò·µ»Ø false.
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mysql_select_db("shop");
Á¬½Ó»úMY SQLÊý¾Ý¿â,´ò¿ªSHOPÊý¾Ý¿â.ÔÚʵ¼ÊÓ¦ÓÃÖÐÓ¦µ±¼ÓÇ¿µã´íÎóÅжÏ.
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ÏÈ¿´Á½¸öº¯Êý£º
¢Ù.¡¢mysql_query
ËͳöÒ»¸ö query ×Ö·û´®. Óï·¨: int mysql_query(string query, int [link_identifier]); ·µ»ØÖµ: ÕûÊý
±¾º¯ÊýËͳö query ×Ö·û´®¹© MySQL ×öÏà¹ØµÄ´¦Àí»òÕßÖ´ÐÐ.ÈôûÓÐÖ¸¶¨ link_identifier ²ÎÊý,Ôò³ÌÐò»á×Ô¶¯Ñ°ÕÒ×î½ü´ò¿ªµÄ ID.µ± query ²éѯ×Ö·û´®ÊÇ UPDATE¡¢INSERT ¼° DELETE ʱ,·µ»ØµÄ¿ÉÄÜÊÇ true »òÕß false£»²éѯµÄ×Ö·û´®ÊÇ SELECT Ôò·µ»ØÐ嵀 ID Öµ,µ±·µ»Ø false ʱ,²¢²»ÊÇÖ´Ðгɹ¦µ«ÎÞ·µ»ØÖµ,¶øÊDzéѯµÄ×Ö·û´®ÓдíÎó.
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¿´Ò»¸ö¼òµ¥µÄÀý×Ó£º
$exec="select * from user";
$result=mysql_query($exec);
while($rs=mysql_fetch_object($result))
{
echo "username:".$rs-username."br";
µ±È»,±íuserÖÐÓÐÒ»¸öusernameµÄ×Ö¶Î,Õâ¾ÍÀàËÆaspÖеÄ
%
exec="select * from user"
set rs=server.createobject("adodb.recordset")
rs.open exec,conn,1,1
do while not rs.eof
response.write "username:"rs("username")"br"
rs.movenext
loop
µ±È»ÏÈÒªÁ¬½ÓÊý¾Ý¿â,Ò»°ãÎÒÃÇ require_once('conn.php');¶øconn.phpÀïÃæ¾ÍÊÇÉÏÒ»´Î˵µÄÁ¬½ÓÊý¾Ý¿âµÄ´úÂë.
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mysql_query($exec);
µ¥Õâ¸öÓï¾ä¾Í¿ÉÒÔÖ´ÐÐËùÓеIJÙ×÷ÁË,²»Í¬µÄ¾ÍÊÇ$execÕâ¸ösqlÓï¾ä
ɾ³ý£º$exec="delete from tablename where...";
Ð޸ģº$exec="update tablename set item1='".$_POST['item1']."' where ...";
˵µ½ÕâÀï¾ÍҪ˵һÏÂ±íµ¥ºÍphp±äÁ¿´«µÝ,Èç¹û±íµ¥ÖеÄÒ»¸ö input name="item1" type="text" id="item1"
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ÊDz»ÊǺܼòµ¥?µ«ÊÇͨ³£$exec»áÓÐÎÊÌâ,ÒòΪ¿ÉÄÜÄúµÄSQLÓï¾ä»áºÜ³¤,Äú»áÒÅ©.Á¬½Ó·û,»òÕß'À´°üΧ×Ö·ûÐÍ×Ö¶Î.
ÎÒÃÇ¿ÉÒÔ×¢ÊÍmysql_query($exec);Óï¾äÓÃecho $exec;´úÌæÀ´Êä³ö$execÒÔ¼ì²éÕýÈ·ÐÔ.Èç¹ûÄú»¹²»Äܲì¾õ$execÓÐʲô´íÎóµÄ»°,¿ÉÒÔ¸´ÖÆÕâ¸ösqlÓï¾äµ½phpmyadminÖÐÖ´ÐÐ,¿´¿´ËüµÄ³ö´íÐÅÏ¢.»¹ÓÐÐèҪעÒâµÄÊÇ,ÎÒÃDz»ÒªÊ¹ÓÃһЩÃô¸ÐµÄ×Ö·û´®×÷Ϊ×Ö¶ÎÃû×Ö,·ñÔòºÜ¿ÉÄÜ»á³öÏÖÎÊÌâ,±ÈÈç˵dateʲôµÄ.±äÁ¿µÄÃüÃû,×ֶεÄÃüÃû×ñÑÒ»µã¹æÂÉÓеÄʱºò¶Ô×Ô¼ºÊÇÒ»Öֺô¦,³õѧÕß²¢²»¿ÉºöÊÓÆäÖØÒªÐÔ.
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SESSIONµÄ×÷Óúܶà,×î¶àÓõľÍÊÇÕ¾µãÄÚÒ³Ãæ¼ä±äÁ¿´«µÝ.
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È»ºó¾Í¿ÉÒÔʹÓÃSESSION±äÁ¿ÁË,±ÈÈç˵Ҫ¸³Öµ¾ÍÊÇ£º$_SESSION['item']="item1";ÒªµÃµ½Öµ¾ÍÊÇ$item1=$_SESSION['item'];,ºÜ¼òµ¥°É.ÕâÀïÎÒÃÇ¿ÉÄÜ»áʹÓõ½Ò»Ð©º¯Êý,±ÈÈç˵ÅжÏÊDz»ÊÇijSESSION±äÁ¿Îª¿Õ,¿ÉÒÔÕâôд£ºempty($_SESSION['inum'])·µ»Øtrue or false.
ÏÂÃæ×ÛºÏÒ»ÏÂÇ°ÃæËù˵µÄÎÒÃÇÀ´¿´Ò»¸öµÇ½³ÌÐò,ÅжÏÓû§ÃûÃÜÂëÊÇ·ñÕýÈ·.
µÇ½±íµ¥ÊÇÕâÑù£ºlogin.php
table width="100%" height="100%" border="0" align="center" cellpadding="0" cellspacing="0"
tr
tr class="tdbg"
/tr
tdp align="center"Username/p/td
tdp align="center"
input name="username" type="text" id="username"
/p/td
tdp align="center"Password/p/td
input name="password" type="password" id="password"
input type="submit" name="Submit" value="Submit"
/table/td/form
/table
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require_once('conn.php');
session_start();
$username=$_POST['username'];
$password=$_POST['password'];
$exec="select * from admin where username='".$username."'";
if($result=mysql_query($exec))
if($rs=mysql_fetch_object($result))
if($rs-password==$password)
$_SESSION['adminname']=$username;
header("location:index.php");
else
echo "scriptalert('Password Check Error!');location.href='login.php';/script";
echo "scriptalert('Username Check Error!');location.href='login.php';/script";
echo "scriptalert('Database Connection Error!');location.href='login.php';/script";
conn.phpÊÇÕâÑù£º
ÓÉÓÚ $_SESSION['adminname']=$username;ÎÒÃÇ¿ÉÒÔÕâÑùдÑéÖ¤ÊÇ·ñµÇ½Óï¾äµÄÎļþ£ºcheckadmin.php
if($_SESSION['adminname']=='')
echo "scriptalert('Please Login First');location.href='login.php';/script";
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¹Ø¼ü¾ÍÊÇÓõ½ÁËSQLÓï¾äÖеÄlimitÀ´ÏÞ¶¨ÏÔʾµÄ¼Ç¼´Ó¼¸µ½¼¸.ÎÒÃÇÐèÒªÒ»¸ö¼Ç¼µ±Ç°Ò³µÄ±äÁ¿$page,»¹ÐèÒª×ܹ²µÄ¼Ç¼Êý$num
¶ÔÓÚ$pageÈç¹ûûÓÐÎÒÃǾÍÈÃËü=0,Èç¹ûÓÐ0¾ÍÈÃËüÒ²=0,Èç¹û³¬¹ýÁË×ܵÄÒ³Êý¾ÍÈÃËû=×ܵÄÒ³Êý.
$execc="select count(*) from tablename ";
$resultc=mysql_query($execc);
$rsc=mysql_fetch_array($resultc);
$num=$rsc[0];
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ceil($num/10))Èç¹ûÒ»Ò³10¼Ç¼µÄ»°,Õâ¸ö¾ÍÊÇ×ܵÄÒ³Êý
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if(empty($_GET['page']))
$page=0;
$page=$_GET['page'];
if($page0)$page=0;
if($page=ceil($num/10))$page=ceil($num/10)-1;//ÒòΪpageÊÇ´Ó0¿ªÊ¼µÄ,ËùÒÔÒª-1
ÕâÑù$exec¿ÉÒÔÕâôд $exec="select * from tablename limit ".($page*10).",10";
//Ò»Ò³ÊÇ10¼Ç¼µÄ
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a href="xxx.php?page=0"FirstPage/a
a href="xxx.php?page=?=($page-1)?"PrevPage/a
a href="xxx.php?page=?=($page¡ô1)?"NextPage/a
a href="xxx.php?page=?=ceil($num/10)-1?"LastPage/a
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ÉÏ´«Îļþ±íµ¥±ØÐë¼ÓÉÏ enctype="multipart/form-data"
ºÍ input type="file" name="file"
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$f=$HTTP_POST_FILES['file'];
$dest_dir='uploads';//É趨ÉÏ´«Ä¿Â¼
$dest=$dest_dir.'/'.date("ymd")."_".$f['name'];//ÎÒÕâÀïÉèÖÃÎļþÃûΪÈÕÆÚ¼ÓÉÏÎļþÃû±ÜÃâÖØ¸´
$r=move_uploaded_file($f['tmp_name'],$dest);
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mail("ÊÕ¼þÈ˵ØÖ·","Ö÷Ìâ","ÕýÎÄ","From:·¢¼þÈË\r\nReply-to:·¢¼þÈ˵ĵØÖ·");
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