WAP Server Configuration
1. Modify the Apache's httpd.conf file and add the following content:
```
AddType application/x-httpd-php .wml
AddType text/vnd.wap.wml .wml; charset=gb2312
AddType image/vnd.wap.wbmp .wbmp
AddType application/vnd.wap.wmlc .wmlc
AddType text/vnd.wap.wmlscript .wmls
AddType application/vnd.wap.wmlscriptc .wmlsc
AddType application/java-archive .jar
AddType text/vnd.sun.j2me.app-descriptor .jad
```
2. Modify the Apache's mime.types file and add the following content:
```
text/vnd.wap.wml .wml
image/vnd.wap.wbmp .wbmp
application/vnd.wap.wmlc .wmlc
text/vnd.wap.wmls .wmls
application/vnd.wap.wmlsc .wmlsc
text/vnd.wap.wml wml
text/vnd.wap.wmlscript wmls
text/vnd.sun.j2me.app-descriptor
application/java-archive
application/vnd.wap.xhtml+xml xhtml
```
3. Test Code:
```php
\n");
echo("!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\" \"http://wapforum.org/DTD/wml_1.1.xml\">\n");
echo ("\n\n");
echo date("l dS of F Y h:i A")."\n";
echo 'Hello World!';
echo ("\n\n");
?>
```
Note: Ensure that all paths and configurations are correctly set up in your environment for proper functioning.