建立动态的WML站点(三)

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 $file;;;printf("＜CARD ＞n");;;printf(" ＜P＞Examinations hours;;n");;;while ($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。;