php log variables to file

a quick way to view a variable content without interrupt the webpage with a var_dump or print_r

file_put_contents('/path_to_file/file.txt', var_export($variable, true));

testing mod rewrite apache

file .htaccess

RewriteEngine On 

RewriteRule ^.*$ index.php

file index.php

<?php

print 'mod_rewrite works!';

?>

Simply put this two files in /var/www/test_mod_rewrite and from the browser call localhost/test_mod_rewrite. "mod_rewrite_works!" should be printed

move dropbox folder in debian

You could just create a symlink to ~/Dropbox

ln -s <dir-that-you-want-to-sync> ~/Dropbox

php json header

For JSON:

header('Content-Type: application/json');

For JSON-P:

header('Content-Type: application/javascript');

fatal error: libcouchbase/couchbase.h: No such file or directory

Installing couchbase library from php I found this little fatal error:

fatal error: libcouchbase/couchbase.h: No such file or directory

This is because the C library not was installed properly. Just run:

sudo wget -O /etc/apt/sources.list.d/couchbase.list packages.couchbase.com/ubuntu/couchbase-ubuntu1204.list 

wget -O- packages.couchbase.com/ubuntu/couchbase.key | sudo apt-key add - 

sudo apt-get update 

sudo apt-get install libcouchbase2 libcouchbase-dev

and then:

sudo apt-get install php-pear 

sudo pecl install couchbase 

sudo apt-get install build-essential

Update php.ini with extension=couchbase.so and restart apache.

Couchbase cbrestore example

Finally I can get cbrestore working after "guess" the syntax. Couchbase official cbrestore documentation is really poor.

The magic line:

sh cbrestore /home/user/Descargas/backup2014-02-10 http://Administrator:password@localhost:8091 --bucket-source=demo --bucket-destination=demo

Disallowed Key Characters WTF??!!

For any weird reason, when I send some forms  this message is displayed:

Disallowed Key Characters

WTF? What I changed?? I don't know. I only know one thing: when this message appeared, I had to start debugging the FRAMEWORK, not my code, not your code, just the framework.

I found the problem in file system/core/Input.php, line 727, function _clean_input_keys{}

When I have a POST field containing "-", this doesnt match the preg_match("/^[a-z0-9:_\/-]+$/i", $str), I dont know why because the "-" IS HERE!!! then ...

I run this: var_dump(preg_match("/^[a-z0-9:_\/-]+$/i", '-')); die(); and of course was TRUE.

Conclusion: I don't know WTF is happening (It's like a devil '-' different from '-'), but, if you are seeing "Disallowed Key Characters" message and you have a post field called, for example "login-submit", rename this field to "login_submit" and maybe all the things start working again.

Codeigniter dinamic route from database

What if we want to route from a db table? I search all the web and I dont find a solution that makes me happy, so, I build one.

File /core/MY_Router.php: we extend the core router to add the database functionality.

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/*

CUSTOM ROUTER FUNCTION TO CHECK FOR CITY SLUG PLUS CONTROLLERS */

 class MY_Router extends CI_Router{

public function __construct(){

        parent::__construct();

        $this->config =& load_class('Config', 'core');

        $this->uri =& load_class('URI', 'core');

        require_once(BASEPATH.'database/DB'.EXT);

        $this->db = DB();

    }

public function _set_routing(){

$db_routes = $this->db

->where('active', 1)

->get('routes')

->result();

foreach ($db_routes as $route) {

$this->routes[$route->slug] = 'coupons/index/' . $city->slug;

$this->routes[$route->slug . '/(:any)'] = 'coupons/index/' . $city->slug . '/$1';

}

parent::_set_routing();

}

}

We need to change one character in system/core/Router.php to avoid overwrite the routes array.

In line 141 change this:

$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route; 

to this:

$this->routes += ( ! isset($route) OR ! is_array($route)) ? array() : $route;

(NOTE THE + SIGN)

That's all. Efective and Beautiful.