Errata

Programming PHP

Errata for Programming PHP

Submit your own errata for this product.

The errata list is a list of errors and their corrections that were found after the product was released.

The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.

Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update

Version Location Description Submitted by Date submitted
Printed Page 19
3rd paragraph

PHP code is printed there, as follows:

// convert &#nnn, entities into characters
$text = preg_replace('/&#([0-9])+);/e', "chr('\1')", $text);

My comment:

The right parenthesis behind the plus mark is superfluous and has
to be dropped. The correct version is:

$text = preg_replace('/&#([0-9])+;/e', "chr('\1')", $text);

 Anonymous   
Printed Page 25
Strings Section

The example:
$name = "Guido";
echo "Hi, $name
";
echo 'Hi, $name';
The book suggest it will be outputted in two linies but it will
be on one single linie . The
will only put the two strings in seperate lines in
the source code. A <br> is required after the
to make it work.

 Anonymous   
Printed Page 29
second block of code

In the first block of code on page 29, the function "database_query($res)" is
invoked. In the second block of code, the same function is invoked, but the
invocation is prepended with a dollar sign ("$database_query($res)"). I believe the
initial dollar sign should not be there.

 Anonymous   
Printed Page 30
1st section, 3rd code example

Line that reads:
if($uninitialized_variable === NULL){

should be:
if($uninitialized_variable == NULL){

There's an extra '=', which can be confusing at such an early point in learning the
language.

 Anonymous   
Printed Page 50
example of while loop

While loop tests for $i <= 10, but $i is never incremented, as in $i++ Only $total is
incremented, but the loop does not test $total. The next example, showing an
alternative syntax does the same. On page 51, the $i is properly incremented.

 Anonymous   
Printed Page 51
second full paragraph, just below the middle of the page

I think that "if ($j = 5)"
should read
"if ($j == 5)".
In other words, the equal sign needs to be double instead of single

 Anonymous   
Printed Page 51
2nd Paragraph

The text that reads:

while ($i < 10) {
while ($j < 10) {
if ($j = 5)
continue 2; // Continues through two levels
$j++;
}
$i++;
}

should read:

while ($i < 10) {
while ($j < 10) {
if ($j == 5)
continue 2; // Continues through two levels
$j++;
}
$i++;
}

note: $j == 5

 Anonymous   
Printed Page 51
code following 2nd paragraph OR explanation following code

First of all, as a couple people noted, the third line of the code should probably be
a comparison, not an assignment. However, since continue (just like in C) returns to
the beginning of the code block, even with this fix, $i never gets a chance to
increment itself, so once j hits 5 we get an infinite loop! Well, it is still valid
CODE (even with assignment instead of comparison in if's expression), so I can't say
the code is the mistake, but the explanation following the code is inconsistent with
the code, as $i retains its original value.

Here is replacement code that terminates, making the statement following the code
somewhat more palatable:

/* one of my pet peeves--initialize vars before using them anywhere other than LHS of
assignments */
$i = $j = 0;
while ($i < 10) {
$i++;
while ($j < 10) {
/* echo "i == $i, j == $j
"; */
if ($j = 5)
continue 2;
$j++;
}
}

The resultant values of $i and $j are 10 and 5, respectively.
(Note that this is not too elegant, since the inner loop will not execute when $i is
0, unless $i is initialized to -1 now.)

Replacement code tested for PHP 4.3.1 (cli) on Linux.

 Anonymous   
Printed Page 54
"exit and return", last line of second paragraph

The exit() construct is NOT an alias for die() -- it's the other way around,
according to the on-line PHP Manual.

 Anonymous   
Printed Page 57
3rd and forth paragrahs

This section discusses using PHP to out put XHTML-style tags (i.e. <br />), however
the code examples use the following HTML Doctype:

<!doctype html public "-//w3c//dtd html 4.0 transitional//en">

Those examples should have an XHTML Doctype, such as the following:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 Anonymous   
Printed Page 67
Last Paragraph of "Passing Parameters by Reference" Section

The current text is:

==================
Even in cases where your function does affect the given value, you may want a
parameter to be passed by reference. When passing by value, PHP must copy the value.
Particularly for large strings and objects, this can be an expensive operation.
Passing by reference removes the need to copy the value.
==================

The first sentence should be:

==================
Even in cases where your function does not affect the given value, you may want a
parameter to be passed by reference.
==================

The paragraph is trying to describe why you would want to pass a parameter to an
array by reference instead of by value. Usually this is only done if you want to
modify the external variable. But the paragraph points out that it may also be done
to save on system resources (even though you may not wish to actually modify the
external variable). This is why the word "not" is a necessary addition. Otherwise
there's no point to the paragraph.

 Anonymous   
Printed Page 69
Sample code in third paragraph under "Return Values"

Function needs to refer to global array to work properly. Sample should read:

$names = array("Fred", "Barney", "Wilma", "Betty");
function & find_one($n) {
global $names;
return $names[$n];
}
$person =& find_one(1); // Barney
$person = "Barnetta"; // changes $names[1]

 Anonymous   
Printed Page 77
2nd bullet from top of page

The effect of minus (-) on strings is in fact vice-versa: it left-justifies, while
default is to right-justify.

 Anonymous   
Printed Page 77
4th bullet from top of page

"For types other than double, this specifier is ignored."
However, the statement:
printf('%.2s', 'abc');
results in an output of only 'ab' (i.e., the first N chars).
Also, for /some/ other types, the specifier is not ignored, it suppresses output of
all data (just like an invalid type specifier):
printf('%.2x', 1231);
printf('%.2X', 1231);
printf('%.2o', 1231);
result in no output.
The manual page http://www.php.net/manual/en/function.sprintf.php is equally mistaken
on this. However, this could be a bug in PHP implementation instead of a bug in the
book/manual.

Tested for all type specifiers under PHP 4.2.3 / bash 2.05.8 / Red Hat Linux

 Anonymous   
Printed Page 77
Table 4-2

Table 4-2 incorrectly lists the printf() type specifiers. The following are
specifiers that should be changed:
printed specifier -> (changed to) correct specifier
B -> b
C -> c
d or I -> d
e, E or f -> e or f
g or G -> g
O -> o
S -> s
U -> u

This info is taken from http://www.php.net/manual/en/function.sprintf.php

 Anonymous   
Printed Page 78
2nd bullet-point from top of page

under "formatting a date"

printf('%02d/%02d/%04y', $month, $day, $year);

should be:

printf('%02d/%02d/%04d', $month, $day, $year);

(the y isn't a valid printf type specifier)

 Anonymous   
Printed Page 80
Very bottom code fragment, second line

$record = trim($record, "
x0B";

should be

$record = trim($record, "
x0B");

Note the closing parenthesis

 Anonymous   
Printed Page 81
3rd Caption (HTML) 2nd paragraph (Entity-quoting all special characters)

Typo; first centence:

The htmlspecialchars() function changes all characters with HTML entity equivelents
into those equivalents (with the exeption of the space character).

This should be:
The htmlentities() function changes all characters with HTML entity equivelents into
those equivalents (with the exeption of the space character).

The example on the next page shows the proper function.

 Anonymous   
Printed Page 85
2nd code sample

the original line

as she hit the backslash(\) key.

would be encoded as

as she hit the backslash(\\) key.

Presumably, the author(s) meant for there to be only one slash in the first line.

 Anonymous   
Printed Page 86
last example

example to explain the difference between == and === is incorrect. The second if will return false. The text is correct, just the code example is wrong.

 Jamie Brown  Feb 25, 2013 
Printed Page 88
Table 4-5

under natural order, i believe the following:

pig10.jpg

should be:

pic10.jpg

 Anonymous   
Printed Page 93
middle

The comments for the two code lines say "find last comma",
but should say "find FIRST comma". Considering that this is
right after strrpos() is mentioned (and the difference is what
differentiates them), this is probably a "serious" typo.

 Anonymous   
Printed Page 93
sscanf sample code

The n in the echo call should be $n and the output is incorrect.

The sample code of the sscanf function is as follows:

$string = "Fred Flintstone (35)";
$n = sscanf($string, "%s %s (%d)", &$first, &$last, &$age);
echo "Matched n fields: $first $last is $age years old";

The out put says it is:

Fred Flintstone is 35 years old

I assume the echo line should read

echo "Matched $n fields: $first $last is $age years old";

And the output should read:

Matched 3 fields: Fred Flintstone is 35 years old

 Anonymous   
Printed Page 95
first code example

Should read:

function has_bad_chars($str) {
return strscspn($str, "
") == strlen($str);
}

 Anonymous   
Printed Page 100
Table 4-7

The expansion of [:punct:] is printed as

[-!"#$%&'()*+,./:;<=>?@[\]^_`{|}~

The first backslash escapes the second backslash. Should not the closing square
bracket immediately following also be escaped with a third backslash?:

[-!"#$%&'()*+,./:;<=>?@[\]^_`{|}~
^

 Anonymous   
Printed Page 101-102
Example 4-1

This script doesn't work: my credit cards are valid but not according to this. The
Luhn part may not apply to all of those cards you mention (in all countries).

 Anonymous   
Printed Page 102
near the bottom of the code sample

There is a line of code in the Luhn checksum example that reads as follows:

$theAdder << 1;

This operation will not explicitly double $theAdder unless the output is assigned to
that variable like this:

$theAdder = $theAdder << 1;

At least, that's the only way I can get left or right shift operations to work in my
environment (PHP 4.1.2, Apache/1.3.9).

 Anonymous   
Printed Page 103
Example parts for "Splitting"

the comment parts should be

// $terms is array('3', '5', 'i', '6', '12')
^

and

// $terms is array('3', '5', 'i/6-12')
^^^^^^

 Anonymous   
Printed Page 103
Second line of the Replacing example

The expression '[b]([^]]*)[/b]' doesn't work.
The subexpression '([^]]*)' won't parse.
It's supposed to be '([^[]*)' which would match any characters that are not '['.
That would match anything between [b] and [/b]

 Anonymous   
Printed Page 111
2nd line of code plus comment form top of page (2 errata in one)

String 'Sylvie' is missing a beginning quote! (Hence, code can't get parsed.) After
this fix, captured $m is array('ylvie', 'lvi'); $m[0] (which is like the $& in perl)
is NOT 'Sylvie' since it is the pattern matched within the input string, not the
entirety of the input string.
[I'm using a clunky term like "pattern matched within" since
preg_match('/php/i', 'abcpHpxyz', $m);
will result in $m[0] containing 'pHp', not 'php'.]

 Anonymous   
Printed Page 114
Last paragraph of "Splitting" section

At the end of section '4.10.13.3 Splitting' the text suddenly switches to a paragraph
about preg_replace_callback( ) that looks like it belongs in the previous section -
'4.10.13.2 Replacing'

 Anonymous   
Printed Page 119
first new paragraph

// $numbers holds the alphabet should be: // $letters holds
// $numbers = array(5, 4, 3, 2); should be // $reversed_numbers =

 Anonymous   
Printed Page 120
Section "Extracting Multiple Values"

According to the documentation at php.net (and my test results), list() only works on
numerical (indexed) arrays. In order to use list() with an associative array,
array_values() must be used.

Therefore:

$person = array('name => 'Fred', 'age' => 35, 'wife' => 'Betty');
list($n, $a, $w) = $person; // $n is 'Fred', $a is 35, $w is 'Betty'

Should be:

$person = array('name => 'Fred', 'age' => 35, 'wife' => 'Betty');
list($n, $a, $w) = array_values($person); // $n is 'Fred', $a is 35, $w is 'Betty'

And:

$person = array('name => 'Fred', 'age' => 35, 'wife' => 'Betty');
list($n, $a) = $person; // $n is 'Fred', $a is 35

Should be:

$person = array('name => 'Fred', 'age' => 35, 'wife' => 'Betty');
list($n, $a) = array_values($person); // $n is 'Fred', $a is 35

 Anonymous   
Printed Page 122
sub-chapter "Checking Whether an Element Exists"

There one can read:

if (array_key_exists(key, array)) {...}

The function returns a Boolean value that indicates whether the second argument is a
valid key in the array given as the first argument.

Remark by the reader:

The key is the first argument and the given array is the second argument.

 Anonymous   
Printed Page 123
5th code segment

// $subjects is array('physics', 'chem');

should be:

// $subjects is array('physics', 'chem', 'drama', 'classics');

 Anonymous   
Printed Page 124
first paragraph

The size of the replacement array doesn't have to be the same as the number of
elements you delete. The array grows or shinks as needed:

$new = array('law', 'business', 'IS');
array_splice($subjects, 2, 4, $new);
// $subjects should be array('physics', 'chem', 'law', 'business', 'IS', 'classics')
// assuming $subjects has the same starting value as before

or changing the code to achieve the wanted result

array_splice($subjects, 3, 4, $new);

 Anonymous   
Printed Page 125
1st Paragraph and 1st Code Example

This states "The most useful value is EXTR_PREFIX_SAME, which says that the third
arguement to extract() is a prefix for the variable names that are created". However,
it will only create a prefix if the associative name as a variable exists (see
http://www.php.net/manual/en/function.extract.php).

The code example gives the following results:
$book_cover == "bird";
$book_shape == "rectangular";
$shape == "round";

In reality it is:
$cover == "bird";
$book_cover == "";
$book_shape == "rectangular";
$shape == "round";

I think the author meant EXTR_PREFIX_ALL instead of EXTR_PREFIX_SAME. That would
return the expected results.

 Anonymous   
Printed Page 127
Example 5-1

the first call to list() should be removed since it seems to cause the first record
to be skipped.
reset($ages);
list($c1, $c2) = each($ages); \ remove this line.
echo("<table><tr><th>$c1</th><th>$c2</th></tr>
";
while (list($c1, $c2) = each($ages)) {....

should be:
reset($ages);
echo("<table><tr><th>$c1</th><th>$c2</th></tr>
";
while (list($c1, $c2) = each($ages)) {....

 Anonymous   
Printed Page 127
last example

for($i = 0; $i < count($array); $i++){
should read
for($i = 0; $i < count($addresses); $i++){

 Anonymous   
Printed Page 128
Reducing An Array - Example of function calls created by array_reduce()

the first function call is listed as:

add_up(2,3)

when it should really be:

add_up(4,3)

 Anonymous   
Printed Page 128
Section "Reducing an Array"

Reducing An Array - Example of function calls created by array_reduce();

The array reduce() line makes these function calls:

add_up(2,3)
add_up(13,5)
add_up(38,7)

The correct list of calls should be:

add_up(0,2) // This line is missing in the book
add_up(4,3) // This line is incorrect in the book
add_up(13,5)
add_up(38,7)

 Anonymous   
Printed Page 129
first example

the resulting calls of the second example of array_reduce() should be:
add_up(11, 2)
add_up(15, 3)
add_up(24, 5)
add_up(49, 7)

 Anonymous   
Printed Page 130
Code snippet following 2nd paragraph

Following the second paragraph is a code snippet, which reads as:
--
$person = array('name' => 'Fred', 'age' => 35, 'wife' => 'Wilma');
$k = array_search($person, 'Wilma');
echo("Fred's $k is Wilma
");
--
The parameters for the function array_search() should be reversed, as in:
--
$k = array_search('Wilma', $person);
--

 Anonymous   
Printed Page 132
Example 5-3. Sorting arrays

When the user_sort functions is supposed to be called, the variable '$sort_type' is
used in it's place.

--> $sort_type($values, 'user_sort');

should read:

--> user_sort($values, $sort_type);

and,

--> $sort_type($values);

should read:

--> user_sort($values);

 Anonymous   
Printed Page 132
Example 5-3

Along with the other reported mistakes in example 5-3, the variables $submitted and
$sort_type are referenced without ever being set. Most likely, there is a missing
extract call before the if($submitted) statement:

extract($_REQUEST);

 Anonymous   
Printed Page 132
17 lines from page bottom (the <form> tag)

This script only works if you change:

<form action="index.php">

to:

<form action="<?= $PHP_SELF; ?>">

Also the script provided for downloading contains only the part of the script on page
132 the continuation of the file on page 132 is not included in 5-3.php.

 Anonymous   
Printed Page 144
3rd paragraph

When invoking a static method the syntax is ClassName::methodName();
You cannot use the -> operator to write ClassName->methodName();

 Anonymous   
Printed Page 147
Line 10 of first code snippet

$barney =& new Person;
should read:
$barney = new Person;

 Anonymous   
Printed Page 157
Figure 6-4. The next page

In figure 6-4 it shows the output of next.php as follows:

The log contains:

Created Fri Jan 4 08:19:30 2002
Viewed first page Fri Jan 4 08:19:30 2002
Viewed first page Fri Jan 4 08:20:47 2002

According to the code in the above paragraph it should read as follows:

The log contains:

Created Fri Jan 4 08:19:30 2002
Viewed first page Fri Jan 4 08:19:30 2002
Viewed page 2 at Fri Jan 4 08:20:47 2002

 Anonymous   
Printed Page 160
8th paragraph

Here on p. 160 we are told that "the $_REQUEST array is also created by PHP if the
register_globals option is on". However, on page 287, para. 5, we are encouraged to
use $_REQUEST when register_globals has been disabled. Contradictory and confusing! I
think the mistake is on p 160.

 Anonymous   
Printed Page 160
8th paragraph

Update to submission from other person.

The register_globals option does not affect the $_REQUEST array, thus it's not confusing with what is stated on page 287.

The register_globals option only affects whether new variables are created for every form parameter, piece of request information, and server configuration value.

 Anonymous   
166
function getChildClasses

In the getChildClasses function there is a call to:

$classes = get_declared_classes(),

the results of which are looped over and for each result with the exception of classes starting with "__" a call to:

$child = new $class

is made. It seems that many of the built in classes returned by get_declared_classes are not able to be instantiated for one reason or another, and the script generally fails with a "Fatal Error"

Code for the function from the book is:

/ return an array of subclasses
function getChildClasses($object)
{
$classes = get_declared_classes();

$children = array();

foreach ($classes as $class) {
if (substr($class, 0, 2) == '__') {
continue;
}

$child = new $class;

if (get_parent_class($child) == get_class($object)) {
$children[] = $class;
}
}

return $children;
}

 Anonymous  Aug 04, 2013 
Printed Page 173
Fourth line from the top.

current line is:
move_uploaded_file($FILES['toProcess']['tmp_name'], "path/to/put/file/$file);
it should be:
move_uploaded_file($FILES['toProcess']['tmp_name'], "path/to/put/file/$file");

missing last quote after $file

 Anonymous   
Printed Page 175
6th line of code at top of page

Missing single quote before the comma in the preg_match function.

 Anonymous   
Printed Page 178
8th line of code

Regarding:

header('HTTP/1.0 401 Unauthorized');

This will not work if you have the CGI version of PHP installed (cf. PHPBuilder.com
forum). You need to put:

header('status: 401 Unauthorized');

Otherwise you get a server error like this one (in your Apache error.log):

[Sat Jun 15 13:34:18 2002] [error] [client 127.0.0.1] malformed header from script.
Bad header=HTTP/1.0 401 Unauthorized: c:/php/php.exe

 Anonymous   
Printed Page 178
8th line of code

Further to my last remark, it should be mentioned as follows (from a tutorial at
Zend.com):

The $PHP_AUTH_USER, $PHP_AUTH_PW and $PHP_AUTH_TYPE global variables are only
available when PHP is installed as a module. If you're using the CGI version of PHP,
you will be limited to Web server-based authentication or other custom types of
authentication (such as using HTML forms) to match passwords in a database.

http://www.zend.com/zend/tut/authentication.php

 Anonymous   
Printed Page 178
Code sample

The script as it stands is not sufficient to deny access to a web page if password
authentication fails. To correct this add the following line after the header()
lines:

exit;

 Anonymous   
Printed Page 191

(details of the 'date' function).
The format character for Minutes is listed incorrectly as I - it should
be i (lower case).

 Anonymous   
Printed Page 197
1st code example

The DB_FETCHMODE_OBJECT mode turns the row into an object, with a property for each
column in the result row:

$row = $result->fetchRow(DB_FETCHMODE_ASSOC);

should be

The DB_FETCHMODE_OBJECT mode turns the row into an object, with a property for each
column in the result row:

$row = $result->fetchRow(DB_FETCHMODE_OBJECT);

 Anonymous   
Printed Page 199
First paragraph of the Shortcuts section

The description of the different query methods lists 5 function names, including
getAssoc. However, the section never explains or gives an example of getAssoc. The
index has no other reference to the command other than this page.

 Anonymous   
Printed Page 199
"better way" code example

The line:

$db->insertMultiple($compiled, $movies);

should be

%db->executeMultiple($compiled, $movies);

 Anonymous   
Printed Page 200
first line of first example on page

first example on the page is presumably showing the use of getCol() but it contains a
call to getAll().
$titles = $db->getCol (.....)
******

 Anonymous   
Printed Page 200
3rd paragraph under section ' Details About a Query Response'

The text says:

"The affectedRows() method tells you about the number of rows affected by an INSERT,
DELETE or UPDATE operation.

$howmany = $response->affectedRows()

Indeed, the affectedRows() method does return the correct number, but it is a method
on the database connection object, NOT the query response object as shown in the
sample code.

 Anonymous   
Printed Page 202
Code snippert on top

The foreach loop on the top of the page is using the function splice().
That function does not exist.
I believe the authors want to replace
splice($a, 0, 0, $id)
with
array_splice($a, 0, 0, $id)

 Anonymous   
Printed Page 209
line 19 of script on the page

Although accurately displayed on page 209, the "examples" script for Example 8-5 is
missing an ending semi-colon on the 29th line (causing a parse error), as follows:

$pick_message = 'Click on one, or control-click on<BR>multiple categories:'

 Anonymous   
Printed Page 233
1st line of last paragraph

The sentence "A PHP document is made up of a numer of pages" should read "A PDF
document is made up of a number of pages," since this section is describing the
structure of PDF documents, and much of what follows specifically applies to PDF
documents and their pages, not to PHP programs in general.

 Anonymous   
Printed Page 262
Chapter

The examples given for using PHP/Sablotron and XSLT *will not* work with the
recently-released PHP 4.2.0; however, if you're still using PHP 4.1.2 they work fine.
I fussed with this for three days before trying the older version of PHP on a hunch,
and it worked.

Apparently they've changed something to do with integration of Sablotron in the new
release that has broken things.

 Anonymous   
Printed Page 266
Example 11-2

Example 11-2 shows this:
function start_element($inParser, $inName, &$inAttributes)
{
$attributes = array();
foreach($inAttributes as $key)
{
$value = $inAttributes[$key];
$attributes[] = "<font color="gray"> $key = "$value" </font>";
...

This appears to use the elements of $inAttributes as its keys. I had better luck
with this:
function start_element($inParser, $inName, &$inAttributes)
{
$attributes = array();
$arrkeys=array_keys($inAttributes);
foreach($arrkeys as $key)
{
$value = $inAttributes[$key];
$attributes[] = "<font color="gray"> $key = "$value" </font>";
...

2cents

 Anonymous   
Printed Page 271
Example 11-8

$fp = fopen('filename', 'r');

SHOULD BE:
$fp = fopen($filename, 'r');

 Kenneth Nellis  May 01, 2009 
Printed Page 275
start of the example 11-10

It reads Example 11-10 bookparse.xml

It should read Example 11-10 bookparse.php

 Anonymous   
Printed Page 340
2nd and 3rd paragraph

json_encode implements the jsonSerialize() method not json_decode()

Serialization suggests taking an object or data structure creating a format that can be stored or sent over a network. So, one would take an object and then create json from it and not the other way around.

Also, when you test the code with json_decode() it does not work and nothing is returned.

 Shawn Pike  Jun 18, 2014 
Printed Page 341
in ResourceFactory class - in authorFromJson method

in the for loop the book reads:

$this->books[] = new Book($bookIdentifier);

However $this does not exist in a static method since a static method does not exist in an instantiated method and $this only exists in instantiated classes.

Should read:

$author->books[] = new Book($bookIdentifier);

 Anonymous  Jun 18, 2014 
Printed Page 387
last paragraph

chop() ist not an alias for ltrim() as mentioned in the book but from rtrim()
according to the PHP documentation.

 Anonymous   
Printed Page 399
Second definition

The call file_exists is cached, but there isn't anything telling you that. On other calls that are cached it is stated:
"This information is cached; you can clear the cached with clearstatcache()."

It would be nice to have this on all of the calls that are cached.

The following calls are cached:
stat(), lstat(), file_exists(), is_writable(), is_readable(), is_executable(), is_file(), is_dir(), is_link(), filectime(), fileatime(), filemtime(), fileinode(), filegroup(), fileowner(), filesize(), filetype(), and fileperms().

Michael Hughes  Aug 04, 2009 
Printed Page 411
top (gettimeofday)

the microseconds key should be usec not msec:
http://www.php.net/manual/en/function.gettimeofday.php

 Anonymous   
Printed Page 451
tan definition

In your definition of the tan function, you say the tan "returns the arc tangent of
value in radians", whereas it infact it returns the tangent of a value in radians.
Thanks!

 Anonymous   
Printed Page 451
Section on system()

The description of the system() call is not accurate. The sentence reads "Executes
command via the shell and returns the last line of output from the command's
results."

A more accurate description would be "Executes command via the shell, returns and
outputs the results of the command."

 Anonymous   
Printed Page 478
"concatenating strings, 37"

The Index states the concatenation assignment operator is "+.". This is incorrect. The correct concatenation assignment operator is ".=", and is correctly identified on page 46.

 Anonymous  Jun 30, 2008