The return values, not the arguments, for asin(), acos(), and atan() are in radians. The arguments for these functions are dimensionless.

NOW READS:
"These functions assume that all angles are in radians, not degrees."

The order of the parameters were also inversed for in_array, first code line under Solution:

NOW READS:
if (in_array($value, $array)) {

The order of the parameters of the function were inversed.

array_search ($array, $value)

NOW READS:
array_search ($value, $array)

Inside the pc_debug() function in the first code block of the Solution, inside pc_debug() in the first code block of the
Discussion, inside pc_debug() and in the if()/elseif() statement in the last
code block of the Discussion:

"defined(DEBUG)"

NOW READS:

"defined('DEBUG')

ftruncate($fp,0)

NOW READS:
ftruncate($fh,0)

In the following code, the DBM handle was missing for dba_replace and dba_insert.
The code at the bottom of page 244 NOW READS:

$dbh = dba_open('fish.db','c','gdbm') or die($php_errormsg);

// retrieve and change values
if (dba_exists('flounder',$dbh)) {
$flounder_count = dba_fetch('flounder',$dbh);
$flounder_count++;
dba_replace('flounder',$flounder_count, $dbh);
print "Updated the flounder count.";
} else {
dba_insert('flounder',1, $dbh);
print "Started the flounder count.";
}

The DBM handle was also missing in the code at the top of page 245;
This code NOW READS:

// what fish do we have?
for ($key = dba_firstkey($dbh); $key !== false; $key = dba_nextkey($dbh)) {
$value = dba_fetch($key, $dbh); =>
print "$key: $value
";
}

The DBM handle was also missing in the code at the bottom of page 246;
This code NOW READS:

// read in and unserialize the data
if ($exists = dba_exists($_REQUEST['username'], $dbh)) {
$serialized_data = dba_fetch($_REQUEST['username'], $dbh) or die($php_errormsg);
$data = unserialize($serialized_data);
} else {
$data = array();
}

The DBM handle was also missing for dba_replace and dba_insert, in the code at the top of page 247.
This code NOW READS:

// write data back to file
if ($exists) {
dba_replace($_REQUEST['username'],serialize($data), $dbh);
} else {
dba_insert($_REQUEST['username'],serialize($data), $dbh);
}

printf('<tr><td>%s: </td><td><input type="text" name="%s" value="%s">,

NOW READS:
printf('<tr><td>%s: </td><td><input type="text" name="%s" value="%s">',

The link -

http://xmlrpc-epi.sourceforge.net/sample/utils/utils.php

NOW READS:
http://xmlrpc-epi.sourceforge.net/xmlrpc_php/index.php

The book describes a beta version of Net_Whois. Between the time we wrote
the chapter and Net_Whois 1.0, there were
some backwards incompatible changes made to the API. Net_Whois::query() is
no longer a static method

Previously the Solution was:

require 'Net/Whois.php';
$server = 'whois.networksolutions.com';
$query = 'example.org';
$data = Net_whois::query($server, $query);

The Solution NOW READS:

require 'Net/Whois.php';
$server = 'whois.networksolutions.com';
$query = 'example.org';

$whois = new Net_Whois;
$data = $whois->query($server, $query);

In discussion on page 452, the line
"print Net_Whois::query('whois.internic.net', 'example.org');"

NOW READS::
$whois = new Net_Whois;
print $whois->query('example.org', 'whois.internic.net');

NOW READS:
"passes it two arguments: 12; and 56."