Errata

The description of "servers" could use a bit of clarification (for some audiences). The concept of
the "web server" has, up to this point, been depicted in various figures as a hardware box that
looks like a typical PC. This paragraph describes a server as a set of programs, one of which
coordinates the others. The paragraph goes on to describe the "starting of new servers" (What?
Another hardware box?) and the "killing of unused servers" (How do you "kill" a piece of
hardware?).

This could be a mystery unless the reader understands the concept that the "the server" is "a set/
collection of intercommunicating processes/programs, i.e., software, that is/are running on one or
more computers", and that the controlling/coordinating process has the ability to dynamically
create/spawn/give birth to additional processes, and destroy them, in order to share the load.

"Both strcmp( ) and strncmp( ) take two strings as parameters, str1 and str2,
and return 0 if the strings are identical, 1 if str1 is less than str2, and -1
if str1 is greater that str2."

"1 if str1 is less than str2, and -1 if str1 is greater that str2"
is inconsistant with examples below on same page:

print strcmp("aardvark", "zebra"); // -1
print strcmp("zebra", "aardvark"); // 1
print strcmp("mouse", "Mouse"); // 1
print strncmp("aardvark", "aardwolf", 5); // -1

Examples are correct and statement is wrong.

The string $phone is not completely verified, only the first four (or five) characters. This, of course, may have been the author's intention.

Example gives:

$var = strtotime("14/5/1955")

The strtotime function takes a US format date, so this should be given as:

$var = strtotime("5/14/1955")

The destructor uses $donation, but this only exists as a value for the constructor. Hence it
creates an "undefined variable" error.

Donation::$totalDonated = Donation::$totalDonated - $donation;

should be replace with

Donation::$totalDonated = Donation::$totalDonated - $this->amount;

Missing double-quote at the end of the print statement.

I.e.

print "There was an error: {$x->getMessage()};

should be

print "There was an error: {$x->getMessage()}";

The GROUP BY statement ends with count(*)>2, but the example output on the next page includes
count(*) values of 2. I.e. the GROUP BY statement should have the ">" replaced with a ">=".

The last paragraph incorrectly refers to non-existant function "mysql_errorno()" rather than the correct "mysql_errno()".

The last paragraph incorrectly refers to non-existant function "mysql_errorno()" rather than the correct "mysql_errno()".

Given Apache httpd.conf change does not match that given in Appendices A-C; it is missing "Satisfy
All".

It states that shellclean() and mysqlclean() are in db.inc. db.inc is shown on page
183 but does not include these functions.

A similar statement is on page 253, center paragraph.
shellclean() is shown on page 200 and mysqlclean() is shown on page 202.

AUTHOR: There are several versions of db.inc. It evolves throughout the book as new
functions and variables are added. The version on the website is the final
version and does contain the functions.

I think a line is missing in the SELECT clause. It is selecting odate and idate (followed by a comma which will cause a SQL syntax error), but the print statements are expecting columns named "cust_id" and "order_id", in addition to idate and odate.

I think a line is missing in the SELECT clause. It is selecting odate and idate (followed by a comma which will cause a SQL syntax error), but the print statements are expecting columns named "cust_id" and "order_id", in addition to idate and odate.

The documentation of the loadTemplatefile() function switches the meaning of the second
and third function parameter. The 3rd sentence says: "The second parameter specifies..."
It should read "The third parameter specifies...". Conversely, the 5th sentence should
say "The second parameter..." instead of "The third parameter..."

Both the blockExists() and BlockvariableExists() functions are declared here to return an array, but the description says that they return true or false.

Both the blockExists() and BlockvariableExists() functions are declared here to return an array, but the description says that they return true or false.

I believe that

"If the double of the digit is greater than 10 ..."

should read

"If the double of the digit is greater than 9 ..."

The bottom arrow is labeled "201 OK".
It should either be "200 OK" or 201 Created".

The book says that strcmp is case-sensitive. However, as the example in Table 15-2
shows, it is case-insensitive.

parseCurrentBlock() takes no arguments. This is correctly stated on page 246 but calls on the above pages include an argument.

The query groups on wine_id, but sorts on date_added. There can be several records with the same
wine_id, but different date_added values, so it isn't clear which date_added value the query will
return. I tried a little experiment, but couldn't
tell if MySQL will always return a specific record or just returns the first one it
finds when it does the grouping. If the query is actually correct, then the book
should explain this.

% ./configure --with-apxs2=/usr/local/apache2/bin/apxs
--with-mysql=/usr/local/mysql/

The final forward slash '/' causes errors on the configure. It should not be there,
with the correct command being:

% ./configure --with-apxs2=/usr/local/apache2/bin/apxs
--with-mysql=/usr/local/mysql

The unix command:
% pico /etc/http/httpd.conf

should read:
% pico /etc/httpd/httpd.conf