Plug in PHP 100 POWER SOLUTIONS- P19 ppt

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About the Plug-in
This plug-in takes a string variable containing accented text and returns a non-accented
version. It requires this argument:
$text A string variable containing the text to be modified
Variables, Arrays, and Functions
$from
Array containing a list of accented characters
$to Array containing non-accented versions of $from
How It Works
This plug-in uses the str_replace() function to replace the characters in the string $text
that match those in the array $from with their non-accented counterparts in the array $to.
In PHP, you can use str_replace() either to substitute single items or, as here,
complete arrays of strings, with each array having 55 characters. If, for example, the
character at location 23 is matched in the array $from, then the character at location 23 in
the array $to is substituted. The substituted text is then returned.
How to Use It
To transform accented text to non-accented text, call up the plug-in as follows:
echo PIPHP_RemoveAccents($text);
The Plug-in
function PIPHP_RemoveAccents($text)
{
$from = array("ỗ", "ổ", "", "ỏ", "ộ", "ớ", "ú", "ỳ", "", "ố",
"ỡ", "ũ", "ự", "ọ", "ở", "ù", "ử", "ỹ", "", "õ",
"ờ", "ợ", "ụ", "ỷ", "ồ", "e", "i", "ứ", "u", "ầ",
"ặ", "", "", "ẫ", "", "ể", "", "", "ẩ", "è",

"ề", "", "", "ậ", "ẽ", "ệ", "ĩ", "", "", "ấ",
"ẻ", "ễ", "", "", "ỉ");

$to = array("c", "ae", "oe", "a", "e", "i", "o", "u", "a", "e",
"i", "o", "u", "a", "e", "i", "o", "u", "y", "a",
"e", "i", "o", "u", "a", "e", "i", "o", "u", "C",
"AE", "OE", "A", "E", "I", "O", "U", "A", "E", "I",
"O", "U", "A", "E", "I", "O", "U", "Y", "A", "E",
"I", "O", "U", "A", "O");

return str_replace($from, $to, $text);
}
C h a p t e r 3 : Te x t P r o c e s s i n g
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C h a p t e r 3 : Te x t P r o c e s s i n g
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Shorten Text
Sometimes, when you want to display the URL on a web page, it can be so long it looks
untidy and messes up your layout. Of course, you can come up with suitable text for a
hyperlink instead of showing the URL, but what about when a user posts a web address to
your web site?
This plug-in has a simple solution because it shortens any long URLs (or other strings)
by removing the middle and only keeping the two ends. Figure 3-10 shows a long URL text
string followed by a version shortened by this plug-in.
You should note that when used on URLs, the shortened text is only for the displayed
part of an HTML link and not the actual link itself, which must remain unchanged; the
plug-in’s main use is for reducing the space that the text of a link takes up on a web page.
About the Plug-in
This plug-in takes a string variable containing a long URL (or other string) and returns a
shortened version. It takes these arguments:

• $text A string variable containing the text to be modified
• $size A numeric variable containing the new string size
• $mark A string variable containing a character sequence to mark the part that was
removed
Variables, Arrays, and Functions
$len
Numeric variable containing the length of the original string
$a
String variable containing the left-hand part of the new string
$b
String variable containing the right-hand part of the new string
How It Works
This plug-in first notes the length of the original string, and if the new required length is not
smaller, simply returns the original string since there’s no shortening to do.
FIGURE 3-10 Shortening URLs or other strings is easily done with this plug-in.

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Otherwise, the left portion of the new string is created by copying half the number of
characters that are to be in the new string from the left of the original string using the
substr() function. The result is then stored in $a. The right-hand portion is similarly
derived by taking half the number of characters required for the new string from the right
of the original string.
This is not quite true. Actually the left and right halves are each one character less than
half the required size of the new string to allow for inserting the $mark string to signify the
part of the string that has been removed.
The three parts—$a, $mark, and $b—are then assembled and returned.
How to Use It

To shorten a URL (or other string), call the plug-in like this, where $text is the string to
shorten, 60 is the new maximum size, and /-/-/ is the marker to signify the portion of the
string that was removed:
echo PIPHP_ShortenText($text, 60, "/-/-/");
The new shorter string will be displayed. You can replace the marker shown with any
string of your choosing.
The Plug-in
function PIPHP_ShortenText($text, $size, $mark)
{
$len = strlen($text);
if ($size >= $len) return $text;

$a = substr($text, 0, $size / 2 -1);
$b = substr($text, $len - $size / 2 + 1, $size/ 2 -1);
return $a . $mark . $b;
}
CHAPTER 4
Image Handling

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H
TML and CSS have developed to such an extent that the depth and variety of
features available to a web developer have never been greater. But when it comes to
images and manipulating them there’s not a lot you can do, other than resize them
in-browser (not a true resize, more of a squash or a stretch) and add borders. True, using
JavaScript you can overlay one image on another and blend them by making one image

semi-transparent, but that’s about the extent of it.
That’s where PHP comes to the rescue, thanks to the GD library of image functions, which
most implementations of PHP now include by default. For example, the recommended Zend
Server CE from Chapter 1 already has GD enabled, as does the Mac MAMP setup.
Installing the GD Library
If you are running a different PHP installation and these plug-ins won’t work because GD
isn’t available, then you need to add it. On Ubuntu and Debian Linux, you can install GD
from the terminal with the following commands:
sudo -i
apt-get install php5-gd
/etc/init.d/apache2 restart
And on Fedora Linux you enter (as root):
yum install php-gd
On other setups, you’ll need to read the PHP documentation for your operating system
and usually recompile PHP with GD using the with-gd option.
For further details on the GD library, including installation and usage, please visit http://
php.net/manual/en/book.image.php. Otherwise, let’s get onto the next batch of ten plug-ins.
Upload File
A major service offered by many web sites is the facility for users to upload files and images.
For example, you may wish to let your users create avatars or upload photos they have
taken. Or perhaps you need to support the uploading of Word, Excel, or other types of files.
Using this plug-in you can enable this feature, while retaining the security of your web site.
Figure 4-1 shows the result of uploading an image file called test.jpg.
FIGURE 4-1 The Upload File plug-in is easy to use and provides lots of information and error checking.

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