Copy the following code. Paste it in a file, save it in PHP extension, upload it or use it at localhost – just change the usersEmail value to your email address, if you are already at gravatars website and hit it. Other instructions for customization of script – you can find in the script. e.g. size of gravatar, default image, rating etc.

Gravatars PHP Script for Your Website

<?php
// The users email, passed to Gravatar
$usersEmail = "myemail@live.com";
 
// default avatar to load if Gravatar doesn't find one
$defaultImage = "http://domain.com/default.png";
 
// The size of the image
$avatarSize = "50";
 
// Minimum rating for your site
// Possible values (G, PG, R, X)
$avatarRating = "G";
 
// Border around the image
$avatarBorder = "000000";
 
// URL for Gravatar
$gravatarURL = "http://www.gravatar.com/avatar.php?gravatar_id=%s&default=%s&size=%s&border=%s&rating=%s";
 
$avatarURL = sprintf
(
	$gravatarURL,
	md5($usersEmail),
	$defaultImage,
	$avatarSize,
	$avatarBorder,
	$avatarRating
);
 
print "<img src="" .
	$avatarURL . "" width="" .
	$avatarSize . "" height="" .
	$avatarSize . "" />";
?>

Enable Gravatar/Avatar at Your Website – Gravatar Image PHP Script is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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Options FollowSymLinks Fileinfo
or
Options SymLinksIfOwnerMatch Fileinfo

If you wish to enable mod_rewrite at the .htaccess level (i.e. only in certain (sub)directories within each vHost and not for all (sub)directories of each vHost), then you must set allowOverride Options (at a minimum) in httpd.conf, and place one of

Options +FollowSymLinks
or
Options +SymLinksIfOwnerMatch

in the .htaccess file(s) to enable mod_rewrite.

In the latter case, it is usual to set Options Fileinfo (and any others) in httpd.conf, and then set Options +FollowSymLinks in .htaccess along with +/-indexes, +/-MultiViews, etc. as desired. Take a look at the +/- add/subtract option syntax versus fixed Option declarations — You’ll likely want to establish fixed baseline Options in httpd.conf, and then use the add/subtract syntax at the .htaccess level. For security, don’t enable any Option unless you’re sure you need it.

If you did not get any clue what the crap was just above, just ignore it and do the following.

Go to Wamp -> Left click at icon in the taskbar -> Click Config files -> httpd.conf
A file will be opened.
Search rewrite in it.
You will get:

#LoadModule rewrite_module modules/mod_rewrite.so

Remove hash from the beginning (Uncomment it) e.g.

LoadModule rewrite_module modules/mod_rewrite.so

Save the file. Mod Rewriting is enabled.

Open Notepad or Textpad or Dtreamweaver.
Create new file.
Save it as .htaccess in the required directory or root directory of website.
Copy and paste the following in it.

Options +FollowSymLinks
RewriteEngine On

And you are done. Use this .htacces file now to code onward and it will work.
The above, when you uncommented the rewrite thing, you enabled mod-rewrite in wamp.

This case is important when there is involvement of redirecting and the use of .htaccess file at localhost. e.g. When you use WordPress at localhost for development purpose, then this method to allow .htaccess file and mod-rewrite for wamp is good. Its GoOoOOoOooD!

Allow htaccess and Mod Rewrite in Wamp is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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Some PHP developers write code with Globals On.

Left click wamp icon -> config files -> php.ini

When its open, search for register_globals

These must be Off by default e.g.
register_globals = Off

Many developers were used to program in environment of On Globals. This makes programming easier but this method is vulnerable and security risk. You do not have to get variables which you post at the new page where PHP does something in case of Globals On. Sometimes developers still do the same thing.

This is not recommended.

Globals should be off in PHP.ini and scripts should work while Globals are off.

So the reason is obvious. Many scripts you download, you will see do not get variables when these are posted. Those are programmed in environment of Globals On (Easy way PHP Coding).

Next time you download a script and if that is not working, check that Variables are being requested after when these are posted or not.

What to Do

Suppose someone posts a form with his name and email with variables txtName and txtEmail which are text input names. txtName and txtEmail should be requested at the next PHP page. If these are not being called, then you will get Null result which will be empty.

Request these variables in the following manner at the next page at the top of everything where PHP code starts. In case of above example:

$txtName=$_REQUEST["txtName"];
$txtEmail=$_REQUEST["txtEmail"];

Now $txtName contains the name of user and $txtEmail contains the email and you can use these further. When some PHP script is not working, always see that if these variables are being requested by this manner at the next page? If not you can get every variable like this and the script will be working in most cases. You can also use $_Post instead of $_REQUEST.

Another reason is not using proper PHP starting tag.

Wrong Tag

<?

Correct Usage of PHP Tag

<?php

Some servers will output errors if you do not use proper PHP starting tag.

Also read Post and Get if this is not clear.

PHP Script Not Working – Solution is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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If you have already used some social networking website or you are a blogger then you definitely know what the tags are. WordPress offers Tags Cloud which can be customized the way you use it at your blog. By default WP Tag Cloud will generate limited number of tags in alphabetical order. Custom templates for tags can be made which means that you can have a full page of tags as you want it. Look at the 404 page of phpmagicbook. I have used tags to give the users some more options to browse if he gets distracted by ‘page not found error’. I was thinking to give my users all tags option to click at any one. Okay now this is just one use. You can have your own customized tags page which can contain just tags and nothing more. We explore some ways about how we can customize tags/tags template/tags page at our WordPress blog.

Default Tags Cloud

Paste the following code anywhere in your blog theme’s template files (e.g. 404 page, single post page etc.) to see default tags cloud in action:

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud();
?>

Display All Tags

Following code will give you all the WordPress tags which you have used in your blog.

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('number=0');
?>

Define Custom Font Size in Tags Cloud

Following code will determine the smallest and largest size in your tags cloud.

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('smallest=8&largest=22');
?>

Random Ordered Tags Cloud

Following code will generate random tags cloud which will not be in alphabetical order.

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('order=RAND');
?>

Tags Cloud Limited in Size & Ordered by Number of Posts

Following code will generate custom font sized tags cloud ordered by post frequency under a specific tag.

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('smallest=8&largest=22&number=30&orderby=count');
?>

Tags Cloud Format

You can format Tags Cloud in flat (Default) format – separated by whitespace, list format and array format by using following method:

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('format=list' );
?>

And there is ASC (Default), DESC and RAND order for Tags display order.
Exclude and Include option to exclude and include tags and more…

Mixing Things Up

And finally with a bit of a magic you can add the bits and bytes into a full story of customized Tags Cloud for your own blog. A possible combination of code and example:

<?php
if (function_exists('wp_tag_cloud'))
wp_tag_cloud('smallest=8&largest=22&unit=pt&number=50&format=flat&orderby=name&order=ASC&exclude=garbagetag&include=mytag' );
?>

Example: Browse Ajax Rain’s tags page to view the full tags option in action.

WordPress has got complete guide about how you can create custom tags cloud page template or how you can customize tags cloud at your blog in a number of ways. Give it a try.

Have your say! Do you like to customize Tags Cloud at your blog or this is not a necessary part?

Customizing WordPress Tags Cloud – A Guide is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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.htaccess file is a magic file. You can change the way your website works by using it. I have been reading a lot about .htaccess files. Perticularly .htaccess is very useful in shared web hosting environment where the users have no direct access to their servers or they want to implement some restrictions/security to their files. I will include here some very essential and useful .htaccess tricks. I have used some of these tricks and more to secure my websites according to my web server’s environment and to optimize speed/performance of my websites. Websites with heavy traffic, Digg traffic, Stumble upon or slashdot traffic will need to be optimized via many ways and .htaccess can help a lot.

Data Compression

Use this code to compress data at web server. Data compression can minimize resources and bandwidth you consume while your website browsing.

# data compression
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/javascript text/css application/javascript

GZip Data Compression

Following is GZIP Compression code. More effective. You can specify which files to compress.

# gzip compression
<IfModule mod_gzip.c>
    mod_gzip_on       Yes
    mod_gzip_dechunk  Yes
    mod_gzip_item_include file      \.(html?|txt|css|js|php|pl|jpg|png|gif)$
    mod_gzip_item_include handler   ^cgi-script$
    mod_gzip_item_include mime      ^text/.*
    mod_gzip_item_include mime      ^application/x-javascript.*
    mod_gzip_item_exclude mime      ^image/.*
    mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>

Preserve Bandwidth

Preserve bandwidth using this method. This is also a compression method.

# preserve bandwidth
<ifmodule mod_php4.c>
 php_value zlib.output_compression 16386
</ifmodule>

Cache Control

Cache is very very useful. By using following code in .htaccess you can enable cache of your files. When enabling cache you will see significant increase in website load time. You will be really amazed to see heavy pages and images loading very fast.

# Begin Cache Control
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType application/x-javascript A2592000
ExpiresByType text/css A2592000
ExpiresByType image/gif A604800
ExpiresByType image/png A604800
ExpiresByType image/jpeg A604800
</IfModule>

Secure .htaccess file

Deny .htaccess file to all intruders. You can specify more files which you want to protect by seperating file names by | sign. .htaccess file can have potential information which must be secured from all outside intruders.

# secure htaccess file
<Files .htaccess>
 order allow,deny
 deny from all
</Files>

Secure Directories

By default your web server’s indexes are on. That means the directory with no index file in it will display all the files in it. Do you want the files in your wp-admin, wp-includes, images, uploads, themes, plugins folders to be seen? It is really not a good idea to show your online folder files. By using following code you will enable protection for all online directories with no index file and will not display files in them.

# No directory listing across domain
Options -Indexes

Secure Hidden Files at Server

Hidden files can be server configuration files, log files and other server reserved files which should be protected from hackers as well.

# Disallow hidden files
RedirectMatch 403 /\..*$

Stop Hotlinking

Some webmasters will just copy the path of images and other media from your website and use that in their own website to display your content consuming your bandwidth. This method is called as hotlinking. Protect hotlinking by using the following code. sorry.gif in the following example is the alternative file which will be displayed when someone will try and steal your content.

# stop hotlinking and serve alternate content
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?yourservernamehere.com/
RewriteRule \.(gif|jpg)$ http://www.yourservernamehere.com/sorry.gif [R,L]

Secure Contact Forms

Secure your contact form from bots and automated softwares which will email you spam. Change ‘contact.php’ page name to your contact page name.

# secure contact forms
RewriteCond %{HTTP_REFERER} !^http://www.yourservernamehere.com/.*$ [NC]
RewriteCond %{REQUEST_POST} .*contact.php$
RewriteRule .* - [F]

Redirect Error Pages

Have you ever encountered 500 error. Internal Server error. That’s really ugly black and while page. I would suggest you to create your own custom error pages and use them wisely to make users stay at your website even some error occurs. Use the following code to redirect the users to your custom error pages in case some error occurs.

<IfModule mod_rewrite.c>
RewriteEngine On
ErrorDocument 206 http://www.yourservernamehere.com/maintenance-mode.html
ErrorDocument 400 http://www.yourservernamehere.com/maintenance-mode.html
ErrorDocument 408 http://www.yourservernamehere.com/maintenance-mode.html
ErrorDocument 500 http://www.yourservernamehere.com/maintenance-mode.html
ErrorDocument 404 http://www.yourservernamehere.com/404.html
</IfModule>

Disable ETags

Disabling Etags will also increase website speed a bit. Removing ETags is a very safe option.

# disable etags
FileETag none

Enable Simple Mod Rewrite

This is not a performance tip. This is how you enable rewriting at your server. I will write a guide about Mod Rewriting in next .htaccess post.

# enable basic rewriting
RewriteEngine on

Instruct Browser to Download Multimedia Files – Force Download

If you want to tell the browser to download certain file types then use the following code.

# instruct browser to download multimedia files
AddType application/octet-stream .avi
AddType application/octet-stream .mpg
AddType application/octet-stream .wmv
AddType application/octet-stream .mp3

In the end let m give you two beautiful resources about .htaccess.

Best Huge Resources About .htaccess Tricks

PerishablePress – .htaccess Tricks (BEST)

Online .htaccess Editor

Use this .htaccess editor to select and create rules easily.

More Resources

Following links will lead you to more detailed resources about .htaccess file customization.
.htaccess Caching Resources
How to Optimize Your Site With HTTP Caching
Speed-up Sites With .htaccess Caching
Data Compression
Compress PHP, CSS, JS & Optimize Website Performance
More Resources
corz.org .htaccess tips
Unix .htaccess Files
http://wiki.dreamhost.com/Category:Htaccess
http://wiki.dreamhost.com/Htaccess_tricks
http://wiki.dreamhost.com/Mod_rewrite
http://wiki.dreamhost.com/DEFLATE
http://wiki.dreamhost.com/More_.htaccess_mod_rewrite_examples
http://en.wikipedia.org/wiki/Htaccess

I am happy to share .htaccess useful tricks. I had searched much for .htaccess codes to optimize my website performance. My next target for .htaccess is Mod Rewrite. How we can Rewrite URLs. Like blogs do. They can change the URL in a friendly way and display post title rather than http://www.homepagename.com?post=some-digit

Allow me to give you all these codes in ready to use .htaccess file in downloadable form.
Just change ‘yourservernamehere’ in the file with your domain name and remove any part which you do not want.

Download .htaccess File

Happy Coding…
Happy Valentine’s Day From PHPMagicBook

.htaccess Essential Tricks For Blog/Website Performance – Guide is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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With Condition

<?php
if ( is_front_page() ) { include (TEMPLATEPATH . '/bio.php'); }
 else { include (TEMPLATEPATH . '/subscribe.php'); }
 ?>

Include a Specific File Without Condition

<?php include (TEMPLATEPATH . '/sidebar2.php'); ?>

Include a Specific File by URL

<?php include ('http://www.websiteurl.com/some-file.php'); ?>

How to Include Specific File In WordPress Blog Template is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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<?php if ( is_front_page() or is_home() or is_single() ) { ?>
Your content goes here.
<? } ?>

is_front_page() and is_home() both will server same purpose.
Put this code anywhere in your blog containing some content in the middle and it should display that content when just single post is viewed or home page of blog is being viewed.

How To Display Some Content at Just Home Page and Single Post of Blog is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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Add the following code where you want the rss to be displayed at your blog i.e. sidebar or footer:

<?php include_once(ABSPATH . WPINC . '/rss.php');
wp_rss('http://feeds.feedburner.com/phpmagicbook', 7); 
?>

We just included the rss.php file, which is a part of WordPress core.
This file allows us to use the wp_rss() function.

wp_rss() function takes two parameters:
The first is the rss feed url
The second is the number of rss entries to be displayed

How simple is that!

Display RSS Feed From Any Blog on Your WordPress Blog is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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Add RSS Feed Link For Comments on Each Post

In order to provide a rss feed for the comments of a specific post, you just have to call the comment_rss_link() function like below:

<?php comments_rss_link('Comments RSS Feed'); ?>

You can put this code in WP LOOP to display RSS for post’s comments from each post right beneath itself.

Similarly we can add a rss link on each post.

Add RSS Link on Each Post

<a href="<?php bloginfo('url'); ?>?feed=rss&p=<?php the_ID(); ?>" target="_blank">RSS 2.0</a>

You can put this code in WP LOOP to display RSS from each post right beneath itself.

Provide RSS Feed for Each Post and Comment at Your WordPress Blog is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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While you are modifying the code, so you will be logged in. We can hide the code when admin user is still in session or when he is logged in, code will not be displayed.

We just have to use the is_user_logged_in() function, which returns true if an user is logged in.

Just paste the following code anywhere on your theme where you display ads.

if (!is_user_logged_in()) {
// Insert Adsense (or whatever) code here
}

Remove Ads for Registered Users or Admin on WordPress Blog is a post from: PHP Magic Book - Free PHP Scripts, Tutorials and Downloads

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