Building WML Sites Page 5

Now the user must input the data as specified in the
next file, index3.wml. We ask the user to insert the name of a subject
or the surname of a professor. Look how variables are sent, in this
page and in the previous. The syntax is pretty complex, but it lets
you handle all the whole process, with only a few files.

<?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).<br />n");
} else if (${$choice} == "subject") {
    echo ("the subject (or part of it).<br />n");
} else {
    echo ("Maybe there is some problem.<br />n");
}
echo ("<input type="text" name="${$choice}" />");
?> 
<do type="text" label="Go"> 
<go method="get" href="query.wml"> 
<?php
echo ("<postfield name="$choice" value="$"."$choice".""/>");
echo ("<postfield name="${$choice}" value="$"."${$choice}".""/>");
?> 
</go> 
</do> 
<p> 
</p> 
</card> 
</wml>