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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