Here are some reason that prevent Word Press to run wp-cron correctly.

• Server doesn’t have DNS, and so it can’t figure out who “example.com” is, even though it is *itself*.
• Server administrators, in a misguided attempt at security, have blocked “loopback” requests, so it can’t actually make a call back to itself.
• Server is running something called “mod_security” or similar, which actively blocks the call due to brain-dead configuration.

There is simple to complex workaround to solve this issue. This problem automatically fix when your server is configured to run wp-cron properly but it require server root access and extensive server administration knowledge. So server configuration method is simply not for everyone to use. There is simple workaround to fix this issue that force wordpress to run wp-cron using alternative method that does not rely on web server configuration. To fix the issue add below line in the wp-config.php file. This line can be add anywhere in the wp-config.php file.

define(‘ALTERNATE_WP_CRON’, true);

This should restore wordpress schedule functionality.

• Create a .htaccess file or edit .htaccess file if you application already using
• Add below lines on the top on file content
  AddType x-mapp-php5 .php
  AddHandler x-mapp-php5 .php
• Upload .htaccess file to root folder of your hosting account.

Done!

Why Redirect Loop?

The issue arise because database was not created during wordpress installation but word press config file was written. WordPress uses wp-config.php file to store database configuration.  If WordPress find this file in the  installation directory then no further installation procedure begin. WordPress now look at DB to load default blog but there is no table in the database. Again, control goes to install procedure but WordPress understand blog already installed because WordPress config file is present in root folder. Once again WordPress try to load blog from database and redirect loop occur.  I hope WordPress guys will fix this in future releases.

The Fix

The fix is very simple. Simply, rename or delete WordPress config file and re-install wordpress mu.  Make sure database user you are using during installation have sufficient permission to create and manipulate database tables.

To fix the issue simply replace vendor function with new method.  New import method return boolean true or false depend on the library loaded or not.  This is useful in some context.  With new import method you have option to verify third party library loading and act accordingly so your application never fail.

Old Method

vendor('facebook/facebook');

New Method

App::import('Vendor', 'facebook/facebook');

Suhosin comes with two component that can work separately or in collboration. The first component called Suhosin patch that help you to secure your application from some low-lever vulnerabilities like bufferoverflows. The second component comes as PHP extension that reduce risk of other security flaws.

Click Here to Learn More

cd : Change directory
Examples:
cd ~ : Change your directory to your home directory.
cd – : Change to the last directory you were in.

tail : Reads and display the end of the file
Examples:
tail /var/www/me.txt : Display last 20 lines (by default) lines of the given file.
tail -f /var/www/me.txt : Watch the file continuously, while it’s being updated.
tail -400 /var/www/me.txt : Print last 400 lines of the file to the screen.

more : Open file one screen at a time.
Examples:
more /etc/log.txt : Opens the file one screen at a time rather than all at once. Press Space to go to next page.

pico : easy to use file editor
Examples:
pico /home/mysite/public_html/you.html : edit the you.html file from the public_html directory.

vi : popular editor in linux, have lots of features but harder to use
Examples:
vi /home/mysite/public_html/you.html : edit the you.html from the public_html directory.

grep : looks for certain patterns in files
Examples:
grep root /etc/passwd : shows all matches of root in /etc/passwd
grep -v root /etc/passwd : shows all lines that do not match root

touch : create an empty file
Examples:
touch /home/mysite//public_html/new.html : create an empty file called new.html in the directory /home/mysite//public_html/

ln : create’s “links” between files and directories
Examples:
ln -s /usr/local/apache/conf/httpd.conf /etc/httpd.conf : Now you can edit /etc/httpd.conf rather than the original. changes will affect the orginal, however you can delete the link and it will not delete the original.

rm : delete a file
Examples:
rm filename.txt : Deletes filename.txt, It will confirm you before deleting file.
rm -f filename.txt : Deletes filename.txt without confirmation.
rm -rf tmp/ : Recursively deletes the directory tmp, and all files in it, including subdirectories.

last : shows who logged in with the time
Examples:
last -20 : shows only the last 20 logins
last -20 -a : shows last 20 logins, with the hostname in the last field

netstat : shows all current network connections.
netstat -an : shows all connections to the server, the source and destination ips and ports.
netstat -rn : shows routing table for all ips bound to the server.

top : shows useful live system info
processes in a table format, memory information, uptime and other useful info. This is excellent for managing your system processes, resources and ensure everything is working fine and your server isn’t bogged down. top then type Shift + M to sort by memory usage or Shift + P to sort by CPU usage

ps: ps is short form of process status, equivalent to the top command. It’s used to show currently running processes with their PID.

A process ID is a unique number that identifies a process, with that you can kill or terminate a running program on your server (see kill command).
Examples:
ps U username : shows processes for a certain user
ps aux : shows all system processes
ps aux –forest : shows all system processes like the above but organizes in a hierarchy that’s very useful!

file : attempts to guess what type of file a file is by looking at it’s content.
Examples:
file * : prints out a list of all files/directories in a directory

du : shows disk usage.
Examples:
du -sh : shows a summary of total disk space used in the current directory, including subdirectories.
du -sh * : same as above, but for each file and directory. helpful when finding large files taking up space.

wc : word count
Examples:
wc -l filename.txt : tells how many lines are in filename.txt

cp : copy a file
Examples:
cp filename filename.backup : copies filename to filename.backup
cp -a /home/mysite/old/* /home/mysite/new/ : copies all files, retaining permissions form one directory to another.

kill: terminate a system process
Examples:
Syntax: kill -9 PID Examples: kill -9 431
Syntax: kill PID Examples: kill 10550

Supports the following languages:

* C++ — `cpp`, `c`, `c++`
* C# — `c#`, `c-sharp`, `csharp`
* CSS — `css`
* Delphi — `delphi`, `pascal`
* Java — `java`
* JavaScript — `js`, `jscript`, `javascript`
* PHP — `php`
* Python — `py`, `python`
* Ruby — `rb`, `ruby`, `rails`, `ror`
* SQL — `sql`
* VB — `vb`, `vb.net`
* XML/HTML — `xml`, `html`, `xhtml`, `xslt`

How to Use Wordpress Syntax/Source Code Highlight Plugin

This plugin do not add any button in the editor to wrap code automatically. Hope this feature will be added soon. You need to wrap you code within </strong>add your php code here <strong>[/source code] tag.

Download: http://downloads.wordpress.org/plugin/syntaxhighlighter.zip
Live Demo/Screenshot: http://www.bala-krishna.com/how-to-clean-special-characters-from-php-string

Here is detailed explanation of function:

$specialCharacters Array: This array used to replace special character with other character or string. if you want to interchange (+) with (plus) then you need to specify in the array. You can add/remove array element according to your requirement.

strtr function: This function used to replace other language special characters to plain English character. You can remove this line safely but ensure before that these characters not in your string and you don’t need to remove them.
Last 4 line used to remove other unknown unwanted special characters.

function just_clean($string)
{
// Replace other special chars
$specialCharacters = array(
'#' => '',
'$' => '',
'%' => '',
'&' => '',
'@' => '',
'.' => '',
'€' => '',
'+' => '',
'=' => '',
'§' => '',
'\\' => '',
'/' => '',
);</code>

while (list($character, $replacement) = each($specialCharacters)) {
$string = str_replace($character, '-' . $replacement . '-', $string);
}

$string = strtr($string,
"ÀÁÂÃÄÅ? áâãäåÒÓÔÕÖØòóôõöøÈÉÊËèéêëÇçÌÍÎÏìíîïÙÚÛÜùúûüÿÑñ",
"AAAAAAaaaaaaOOOOOOooooooEEEEeeeeCcIIIIiiiiUUUUuuuuyNn"
);

// Remove all remaining other unknown characters
$string = preg_replace('/[^a-zA-Z0-9\-]/', ' ', $string);
$string = preg_replace('/^[\-]+/', '', $string);
$string = preg_replace('/[\-]+$/', '', $string);
$string = preg_replace('/[\-]{2,}/', ' ', $string);

return $string;
}

Here is the quick fix the error:

1. Download .htaccess file from your root directory or create one if not exist.
2. Add following Line in .htaccess file.
3. <IfModule mod_security.c>
   <Files post.php>
   SecFilterEngine Off
   SecFilterScanPOST Off
   </Files>
   </IfModule>
4. If <IfModule mod_security.c> line already in your .htaccess file then place only <Files..></Files> block inside if module block.
5. Save file and upload file to your host root directory.
6. All done..