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.
| Version |
Location |
Description |
Submitted By |
| Printed |
Page 12
7th par |
Hi,
It is two years ago that this book was printed. Is it possible that the instructions on installing Apache are somewhat out of date by now (Sept. 2008)?
Anyway, I followed the instructions carefully, but when I ran the services.msc command there was no Apache2 in the list. So I am stuck, rendering the book fairly useless.
Any help? I downloaded Apache 2.2.9
Regards,
Hans
____________________
Hans Teijgeler
Laanweg 28
1871 BJ Schoorl
The Netherlands
+31-72-509 2005
hans.teijgeler@quicknet.nl
|
Anonymous |
| Printed |
Page 42
Returning by Reference |
Paragraph ends "you use the normal reference assign that you learned earlier". However, AFAICT there is no earlier reference to =& assignments; the first real discussion of them in on page 57.
|
MadOverlord |
| Printed |
Page 76
The Array Cursor |
In this section a motif is introduced : list($var,$val) = each($array)
However, it is nowhere explained what each() actually returns, other than that it steps through $array. Nor is list() ever explained. And neither have entries in the glossary.
For other confused people, the answers are here:
http://php.net/manual/en/function.list.php
http://us.php.net/manual/en/function.each.php
|
MadOverlord |
| Printed |
Page 97
dechex() paragraph |
The sentence
The dechex() function converts a decimal number into a binary number.
should read
The dechex() function converts a decimal number into a hexadecimal number.
|
Anonymous |
| Printed |
Page 98
empty() function, 1st paragraph |
Current text:
"...if a variable was set and had a false value (such as 0 or an empty string),
empty() would return false, ..."
This is not so; empty() would return true. This text contradicts the first sentence
in the paragraph.
The same error appears on page 104 in the description of the isset() function.
|
Anonymous |
| Printed |
Page 104
md5() function description |
Book says "An MD5 checksum is 32 bytes long, which is equal to 128 bits," but since a byte is 8 bits, 8*32=256 bits which is wrong.
The correct answer is 128 bits which equals 16 bytes or 32 characters in HEX notation where each character represents 4 bits.
A problem also exists for sha1() on page 114.
|
Anonymous |
| Printed |
Page 114
sha1() section |
In the first sentence
SHA stands for the "Secure Hash Algorithm", and it is a way of converting a string of
any size into a 40-bit hexadecimal ...
40-bit should read 40-digit
In the 3rd paragraph, last sentence
If you have the passwords of people on your database ...
should read
If you have the checksummed passwords of people in your database ...
|
Anonymous |
| Printed |
Page 114
sha1() definition |
Book says "...it is a way of converting a string of any size into a 40-bit
hexadecimal number..."
The right answer is that it is 160-bits, 160/8=20 bytes. The 20 bytes uses 40
characters to display in hex notation.
-----
On the next page the book says at the end of the first paragraph "...can create a
checksum of strings of millions of characters in just 40 bytes."
The right answer is 20 bytes.
|
Anonymous |
| Printed |
Page 116
Description of str_pad() has errors |
Second parameter is final length of padded string, not amount to add. first example should be $newstring = str_pad($string, strlen($string) + 2);
Further examples need similar adjustment.
Default padding on my system is STR_PAD_RIGHT, not STR_PAD_BOTH.
php -v
PHP 5.1.4 (cli) (built: Sep 18 2006 19:11:27)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
built from source on a Macbook running OS X 10.4.9
|
Anonymous |
| Printed |
Page 134
2nd paragraph under Access Control Modifiers |
The word "word" should be changed to "world" in the sentence starting with "In an encapsulated word".
|
Anonymous |
| Printed |
Page 135
example code |
public should probably be removed from before both method/function
definitions to agree with the text description that it is not needed.
|
Anonymous |
| Printed |
Page 144
2nd and 4th section of mono type (2nd and 4th examples) |
I don't see where "Creating Poppy" gets printed anywhere. I think it should be:
Creating a dog: Poppy
Creating a poodle
blah blah
|
Anonymous |
| Printed |
Page 148
First example |
Last line in first example is:
print (int)($Joe === $Joe) . "
";
It should be:
print (int)($Bob === $Joe) . "
";
|
Anonymous |
| PDF |
Page 240
1st |
"The preg_match() function has a FORTH parameter.."
How come i see only three parameters...
and again in the source code there is a reference to the %myarray even though it wasn't declared...
some parameter is obviously missing...
|
Anonymous |
| Printed |
Page 247
Getting Arty - Example code |
To get the output shown on the next page (248), the for loop in the example code should have the condition $i > 200 and not $i >0. The code should be:
for ($i=400, $j=300; $i>200; $i -= 4, $j -= 3) {
The squares are then correctly drawn all the way into the centre (400/2).
|
Kim Burton |
