Here is the code for this page

<!--#echo var="HTTP_USER_AGENT"-->

<!--#set var="foobar" value="foobar.com" -->

<!--#if expr="${foobar} = /blooh-blah/" --> 
<p>This is the <i>if</i> part of the conditional
<br>This should not print
<!--#else -->
<p>This is the <i>else</i> part of the conditional
<br>This should print 
<!--#endif -->

<pre>
<!--#printenv -->
</pre>

This is the else part of the conditional
This should print

UNIQUE_ID=aCNZSEmR3JtYuJhgjk43FQAAAM0
SCRIPT_URL=/~downeyt/scripts/cgi2_examples/ch06/conditional.shtml
SCRIPT_URI=https://users.cs.fiu.edu/~downeyt/scripts/cgi2_examples/ch06/conditional.shtml
HTTPS=on
SSL_TLS_SNI=users.cs.fiu.edu
SSL_SERVER_S_DN_CN=cs.fiu.edu
SSL_SERVER_I_DN_C=US
SSL_SERVER_I_DN_O=Let's Encrypt
SSL_SERVER_I_DN_CN=R10
SSL_SERVER_SAN_DNS_0=*.cs.fiu.edu
SSL_SERVER_SAN_DNS_1=cs.fiu.edu
SSL_VERSION_INTERFACE=mod_ssl/2.4.37
SSL_VERSION_LIBRARY=OpenSSL/1.1.1k
SSL_PROTOCOL=TLSv1.3
SSL_SECURE_RENEG=true
SSL_COMPRESS_METHOD=NULL
SSL_CIPHER=TLS_AES_256_GCM_SHA384
SSL_CIPHER_EXPORT=false
SSL_CIPHER_USEKEYSIZE=256
SSL_CIPHER_ALGKEYSIZE=256
SSL_CLIENT_VERIFY=NONE
SSL_SERVER_M_VERSION=3
SSL_SERVER_M_SERIAL=068CB7C7DDD79D6E9EDCD4EC20CB94609B5F
SSL_SERVER_V_START=Apr 15 12:45:03 2025 GMT
SSL_SERVER_V_END=Jul 14 12:45:02 2025 GMT
SSL_SERVER_S_DN=CN=cs.fiu.edu
SSL_SERVER_I_DN=CN=R10,O=Let's Encrypt,C=US
SSL_SERVER_A_KEY=rsaEncryption
SSL_SERVER_A_SIG=sha256WithRSAEncryption
SSL_SESSION_ID=8355e95bb3491468d9e99fa91659225fc6b2b3a23097d6c5dd925e1595179fd5
SSL_SESSION_RESUMED=Initial
HTTP_ACCEPT=*/*
HTTP_USER_AGENT=Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_ACCEPT_ENCODING=gzip, br, zstd, deflate
HTTP_HOST=users.cs.fiu.edu
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
SERVER_SIGNATURE=
SERVER_SOFTWARE=Apache
SERVER_NAME=users.cs.fiu.edu
SERVER_ADDR=131.94.130.45
SERVER_PORT=443
REMOTE_ADDR=3.145.88.233
DOCUMENT_ROOT=/var/www/html
REQUEST_SCHEME=https
CONTEXT_PREFIX=/~downeyt
CONTEXT_DOCUMENT_ROOT=/home/bear-d/users/downeyt/public_html
SERVER_ADMIN=root@localhost
SCRIPT_FILENAME=/home/bear-d/users/downeyt/public_html/scripts/cgi2_examples/ch06/conditional.shtml
REMOTE_PORT=59454
GATEWAY_INTERFACE=CGI/1.1
SERVER_PROTOCOL=HTTP/1.1
REQUEST_METHOD=GET
QUERY_STRING=
REQUEST_URI=/~downeyt/scripts/cgi2_examples/ch06/conditional.shtml
SCRIPT_NAME=/~downeyt/scripts/cgi2_examples/ch06/conditional.shtml
DATE_LOCAL=Tuesday, 13-May-2025 10:38:00 EDT
DATE_GMT=Tuesday, 13-May-2025 14:38:00 GMT
LAST_MODIFIED=Monday, 19-Aug-2013 12:07:44 EDT
DOCUMENT_URI=/~downeyt/scripts/cgi2_examples/ch06/conditional.shtml
DOCUMENT_ARGS=
USER_NAME=downeyt
DOCUMENT_NAME=conditional.shtml
foobar=foobar.com