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建立动态的WML站点(三)

发布时间:2006-10-09 作者: 来源:转载
接着用户必须在下一个文件(index3.wml)中输入。我们要求用户输入科目的名字或者教授的姓。你要留意一下变量在页面之间是怎样传送的。语法看来有点复杂,不过可以让你了解整个过程是怎样通过几个文件来完成的。<DOtype="text"label="Go"><GOhref="query.w
接着用户必须在下一个文件(index3.wml)中输入。我们要求用户输入科目的名字或者教授的姓。你要留意一下变量在页面之间是怎样传送的。语法看来有点复杂,不过可以让你了解整个过程是怎样通过几个文件来完成的。

<?php

Header("Content-type: text/vnd.wap.wml");

header("Cache-Control: no-cache, must-revalidate");

header("Pragma: no-cache");

echo ("<?xml version='1.0'?>;");

>;

<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"

"http://www.wapforum.org/DTD/wml_1.1.xml" >; <WML>

<CARD id=card3 title=Name>

<?php

echo ("<p>Insert ");

if (${$choice} == "surname") {

echo ("professor's surname (or part of it).n");

} else if (${$choice} == "subject") {

echo ("the subject (or part of it).n");

} else {

echo ("Maybe there is some problem.n");

} echo ("<INPUT name='"${$choice}"' type='"text"'>");

?>

<DO type="text" label="Go">

<GO href="query.wml" method="get">

<?php

echo ("<POSTFIELD value='"$"."$choice".""/' name='"$choice"'>");

echo ("<POSTFIELD value='"$"."${$choice}".""/' name='"${$choice}"'>");

?>

</GO>

</DO>

<P></P>

</CARD>

</WML>

<DO type="text" label="Go">

<GO href="index3.wml#card3" method="get">

<?php

echo ("<POSTFIELD value='"$"."$choice".""/' name='"$choice"'>");

echo ("<POSTFIELD value='"$choice"/' name='"choice"'>");

?>

</CARD>

</WML>

写查询代码

以下的文件负责处理查询。它的名字是query.wml,我们将更详细地分析它。

<?php

Header("Content-type: text/vnd.wap.wml");

printf("<?xml version="1.0"?>n");

printf("n");

printf("n");

// 以下各行是用来为查询授课时间构造SQL语句的

$consulting_tables =

"(professors left join teach on (professors.Id = teach.Id), subjects)";

$consulting_columns =

"professors.Surname, professors.Name, subjects.Subject , ";

$consulting_columns .=

"subjects.Cod_number, professors.Consulting_hour, professors.Consulting_place";

$consulting_query=

"subjects.Cod_Subject = teach.Cod_subject ";

// 以下各行是用来为查询测验时间构造SQL语句的

$exams_tables= "(exams left join professors ON (exams.Id = professors.Id), subjects)";

$exams_columns= "subjects.Subject , subjects.Cod_number, professors.Surname, ";

$exams_columns.= "professors.Name, exams.Date, exams.Time, exams.Room, exams.Test";

$exams_query= "exams.Cod_Subject = subjects.Cod_Subject ";

// 以下各行是用来为查询测验时间表的sql语句增加查询限制

if ($exams_data) {

switch($exams_data) {

case "subject":

$exams_query.= " and subjects.Subject like '%$subject%'";

break;

case "surname":

$exams_query.= " and professors.Surname like '%$surname%'";

break;

}

}

// 以下各行是用来为查询授课时间的sql语句增加查询限制

if ($consulting_data) {

switch($consulting_data) {

case "subject":

$consulting_query

.= " and subjects.Subject like '%$subject%'";

break;

case "surname":

$consulting_query.= " and professors.Surname like '%$surname%'";

break;

}

}

// 处理与数据库的连接

function connect($tables, $data, $condition_passed) {

//

// put your password and username in next line

//

$db = mysql_pconnect("localhost","***","***");

// put your database name in next line

mysql_select_db("lanfranchi_co_uk",$db);

$sql = "SELECT $data FROM $tables WHERE $condition_passed order by professors.Surname";

$result = mysql_query($sql,$db);

return $result;

}

// 这个函数产生授课时间的wml代码

function consulting_print($consulting_result) {

global $file;

printf("n");

printf(" <P>Receiving hours

n");

while ($myrow = mysql_fetch_row($consulting_result)) {

printf(" <P>$myrow[0], $myrow[1]</P>n");

printf(" <P>$myrow[2]</P>n");

printf(" <P>$myrow[3]</P>n");

printf(" <P>$myrow[4]</P>n");

printf(" <P>$myrow[5]</P>n");

}

printf("</CARD>n");

}

// 这个函数产生测验时间表的wml代码

function print_exams($exams_result) {

global $file;

printf("<CARD id='"card1"' title='"hours"'>n");

printf(" <P>Examinations hours

n");

while ($myrow = mysql_fetch_row($exams_result)) {

printf(" <P>$myrow[2], $myrow[3]</P>n");

printf(" <P>$myrow[0]</P>n");

printf(" <P>$myrow[1]]</P>n");

printf(" <P>$myrow[4], $myrow[5]</P>n");

printf(" <P>$myrow[7]</P>n");

printf(" <P>$myrow[6]</P>n");

}

printf("</CARD>n");

}

// 检查你时候选择授课时间或者测验时间,连接数据库并且调用产生wml代码的函数

if ($consulting_data) {

$connection_result =

connect($consulting_tables, $consulting_columns, $consulting_query);

consulting_print($connection_result);

}

if ($exams_data) {

$connection_result =

connect($exams_tables, $ exams_columns, $ exams_query);

print_exams($connection_result);

}

printf("</WML>n");

?>

好,完成了。你已经建立了首个基于MySQL数据库的PHP/WML页面了,自己继续实践一下吧。

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