Tag: PHP

PHP if else statement- Normal and advanced

Here now I am giving you the normal code example.

$test = 100;

if ( $test == 100 ) {
echo “The if statement evaluated to true”;
} else {
echo “The if statement evaluated to false”;
}

If you want to use this in one line than use following code:

echo $testprint = ( $test == 100 ) ?  “The if statement evaluated to true” : “The if statement evaluated to false”;

This will gives you same output.

Now I am giving you the multiple IF else statment in very short way.

if ( one= true ){
if ( two=true){
echo “one”;
}else{
echo “two”;
}
}else{
echo “nothing”;
}

Short way:

$shortway = (one= true) ? (two=true ) ? “one” : ‘two’ ) : “nothing”;

Solved :Error establishing a database connection

Many times I saw this message. “Error establishing a database connection”. That time I did not understand why this message is coming.

When started working on WordPress blog Plugins, Themes. Then I got to know about this error.
Whenever you mis-configured the wp-config.php file. You will this kind of error.

You need to Fill following information correctly:(dont forget to create database your own)
** The name of the database for WordPress */

define(‘DB_NAME’, ‘wordpress’);

/** MySQL database username */

define(‘DB_USER’, ‘root’);

/** MySQL database password */

define(‘DB_PASSWORD’, ”);

/** MySQL hostname */

define(‘DB_HOST’, ‘localhost’);

This will solve your problem.

Use PHP in Rails project

Many times you need to use PHP scripts in Rails project. You will got so much open source PHP scripts for various use.

Example is So many Rails site is using WordPress for blogging system.

Main reason behind using PHP files or script is SEO. PHP is a very SEO friendly.

Customer does not want to spend money or time already existing scripts or program.

If you want to use PHP files or project under Rails project. Just create any folder in Public directory and put your php files in to that folder.

lets say you created the “fourm” dir in public directory.

You need to add following lines in your apache rule file(httpd.conf)

LoadModule proxy_module modules/mod_proxy.so

LoadModule proxy_http_module modules/mod_proxy_http.so

Under <VirtualHost  *:80> tag add following lines:

ProxyRequests Off

RewriteEngine On

RewriteCond  %{HTTP_HOST}    ^example.com [NC]
RewriteCond %{REQUEST_URI}  !^/forum(.*)$ [NC]

RewriteCond  %{HTTP_HOST}    ^example.com [NC]

RewriteRule ^/forum/?(.*)$ /document_root/forum/$1 [QSA,NC,L]

Than you are able to use PHP code or scripts in Rails project

NginX Rule for WordPress Mu with Pretty Url

I am using wordpressmu 2.6.5, quite old version. Three month back i moved our site Apache to Nginx. Now these day nobody use wordpress mu. Still article can be used for wordpress multisite.

NginX Rule for WordPress Mu with Pretty Url

Nginx i am using for Rails and WordPressmu application.

I am able to run wordpressmu and Clean Urls(Pretty Url) successfully. I am using Fedora 9 as OS.
“/usr/share/nginx/html/wordpress” – This is my path where i installed WordPressmu

Here is my Nginx code:


server {
listen 80;
server_name localhost.localdomain;
# access_log logs/site.access.log;

location ~* ^.+\.(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js)$
{
root /usr/share/nginx/html/wordpress;
rewrite ^/.*(/wp-admin/.*\.(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js))$ $1 last;
rewrite ^/.*(/wp-includes/.*\.(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js))$ $1 last;
rewrite ^/.*(/wp-content/themes/.*\.(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js))$ $1 last;
rewrite ^/.*(/wp-content/.*\.(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js))$ $1 last;
rewrite ^.*/files/(.*(html|jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js))$ /wp-content/blogs.php?file=$1 last;
expires 10d;
break;
}

location / {
root /usr/share/nginx/html;
index index.php;

rewrite ^.*/.*/files/(.*) /wordpress/wp-content/blogs.php?file=$1;
if (!-e $request_filename) {
rewrite ^.+?(/wp-.*) /wordpress$1 last;
rewrite ^.+?(/.*\.php)$ /wordpress$1 last;
rewrite ^(.+)$ /wordpress/index.php?q=$1 last;
break;
}

fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;

fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
fastcgi_param REDIRECT_STATUS 200;
include fastcgi_params;

}

location = /50x.html {
root /var/www/nginx-default;
}

}

This code is working fine for me.

Install Apatana Studio on Fedora 9

Installation of Apatana in Detail

1. Download zip file from this location(http://www.aptana.com/studio/download)
File name:Aptana_Studio_Setup_Linux_1.2.7.zip
2. Then uncompress the .zip file. and copy the resulting ‘aptana’ folder under ‘/home/siwan’.(siwan is my username for fedora, you have replace your username)
3. Install xulrunner (for install xulrunner user following command, Became root first)
yum install xulrunner
or follow this step
Down load xulrunner from this url
http://releases.mozilla.org/pub/mozilla.org/xulrunner/releases/1.8.1.3/contrib/linux-i686/xulrunner-1.8.1.3.en-US.linux-i686-20080128.tar.gz
Unarchive using file roller to get a ‘xulrunner’ folder.
Open a terminal, and type the following commands, changing the path in the last line ie nigel to your username.
(for install xulrunner user following command, Became root first)

    mkdir /usr/lib/xulrunner
    cp -r /home/nigel/Download/xulrunner/* /usr/lib/xulrunner

4. Create a new file called say ‘aptana.sh’ and make it executable
use this command for make file executable.
Became root user first.
cd /home/siwan/aptana/
chmod +x aptana.sh
5. Copy the following into that text file

#!/bin/sh
MOZILLA_FIVE_HOME=/usr/lib/xulrunner
if [ $LD_LIBRARY_PATH ]; then
LD_LIBRARY_PATH=$MOZILLA_FIVE_HOME:$LD_LIBRARY_PATH
else
LD_LIBRARY_PATH=$MOZILLA_FIVE_HOME
fi
export MOZILLA_FIVE_HOME LD_LIBRARY_PATH
/home/siwan/aptana/AptanaStudio

Then run the aptana.sh file.
Enjoy with Aptana Studio

Easy Steps for setting up nginx with php on Linux

I am using Fedora 10 so for that linux version i used these commands for setting up my server.

Installing Nginx:
yum install nginx

Then we create the system startup links for nginx:
/sbin/chkconfig –level 35 nginx on

We can make PHP5 work in nginx through FastCGI.For that install all this packages:
yum install lighttpd-fastcgi php-cli php-mysql php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc php-eaccelerator php-magickwand php-magpierss php-mapserver php-mbstring php-mcrypt php-mhash php-mssql php-shout php-snmp php-soap php-tidy

Then open /etc/php.ini and add the line cgi.fix_pathinfo = 1 right at the end of the file:
vi /etc/php.ini
paste this line :- cgi.fix_pathinfo = 1

To start a PHP FastCGI daemon listening on port 9000 on localhost and running as the user and group nginx, we run the following command:
/usr/bin/spawn-fcgi -a 127.0.0.1 -p 9000 -u nginx -g nginx -f /usr/bin/php-cgi -P /var/run/fastcgi-php.pid

To restart PHP FastCGI daemon, Use this command:
ps -ef|grep php-cgi
kill PROCESS_ID

you don’t want to type in that command manually whenever you boot the system, so to have the system execute the command automatically at boot time, open /etc/rc.local…
vi /etc/rc.local
and add the command at the end of the file:
/usr/bin/spawn-fcgi -a 127.0.0.1 -p 9000 -u nginx  -g nginx -f /usr/bin/php-cgi -P /var/run/fastcgi-php.pid

THEN STOP THE APACHE WEB SERVER:
/sbin/init.d/httpd stop
To stop apache on every startup:
/sbin/chkconfig –level 35 httpd off

First take backup of your nginx configuration file:
cp /etc/nginx/nginx.conf nginx.conf_cp
use nginx.conf file from life180 “config/nginx” folder

Php Mysql Question and Answers for Interview

What is the difference between PHP4 and PHP5?
PHP4 cannot support oops concepts and Zend engine 1 is used.
PHP5 supports oops concepts and Zend engine 2 is used.
Error supporting is increased in PHP5.
XML and SQLLite will is increased in PHP5.Can we use include(abc.PHP) two times in a PHP page makeit.PHP”?
Yes we can include that many times we want, but here are some things to make sure of:
(including abc.PHP, the file names are case-sensitive)
there shouldn’t be any duplicate function names, means there should not be functions or classes or variables with the same name in abc.PHP and makeit.php

How i can get ip address – REMOTE_ADDR – the IP address of the client
REMOTE_HOST – the host address of the client, if available

What is the difference between echo and print statement? – echo() can take multiple expressions,Print cannot take multiple expressions.
echo has the slight performance advantage because it doesn’t have a return value.
True, echo is a little bit faster.

How we know browser properties -echo $_SERVER[‘HTTP_USER_AGENT’] . “<hr /> “;
$browser = get_browser();
foreach ($browser as $name => $value) {
echo “<b>$name</b> $value <br /> “;
}

How i will check that user is, logged in or not. i want to make it a function and i want to use in each page and after login i want to go in current page(same page. where i was working)

What is difference between require_once(), require(), include(). Becouse above three function usely use to call a file in another file.
Difference between require() and require_once(): require() includes and evaluates a specific file, while require_once() does that only if it has not been included before (on the same page).
So, require_once() is recommended to use when you want to include a file where you have a lot of functions for example. This way you make sure you don’t include the file more times and you will not get the “function re-declared” error.
Difference between require() and include() is that require() produces a FATAL ERROR if the file you want to include is not found, while include() only produces a WARNING.
There is also include_once() which is the same as include(), but the difference between them is the same as the difference between require() and require_once().

How do I generate a random number from-php?
srand((double)microtime()*1000000);
echo rand(0,100);

How do I set the browser timeout?
set_time_limit(900);
this sets the timeout too 900 seconds / 15 minutes.

How can I do error handling in php?

Is it possible to connect to a ftp server with php?
Yes it is possible, you can use the ftp_connect function. (PHP 3>= 3.0.13, PHP 4 >= 4.0b4)

How do I find out how a user came to my page?
You have the variable $HTTP_REFERER which holds the page that refered to you page, if there are any referer, ie if the user enters your url directly the referer variable will be empty.

How can I add text to an image?
array imagettftext ( resource $image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text )
how to rotate an image using php code?
$move90 = imagerotate($myimage,90);
//$myimage is the reference to the loaded image, eg through imagecreatefromjpeg

How do I find the size of an array? –use Count function
$values = range(“A”,”Z”);
echo count($values);

How do I remove escape characters from data?
$data = “I\’m the king of the castle”;
echo stripslashes($data); //I’m the king of the castle

What are magic quotes?
Magic quotes is a configuration setting within PHP that means that all data containing a single or double quote, or NUL, will automatically be escaped with a backslash before being entered into a database.

How can we encrypt the username and password using PHP?

What is the difference between $message and $$message?
$message is a simple variable whereas $$message is a reference variable.

What are the differences between DROP a table and TRUNCATE a table?

What’s the difference between md5(), crc32() and sha1() crypto on PHP?
The major difference is the length of the hash generated. CRC32 is, evidently, 32 bits, while sha1() returns a 128 bit value, and md5() returns a 160 bit value. This is important when avoiding collisions.

How to set cookies?
setcookie(’variable’,’value’,’time’)
;

Create breadcrumb in php – PHP Breadcrumb

breadcrumb is useful for every site. here I explained code about Create breadcrumb in php – PHP Breadcrumb. This code will be helpful for website developers.

Create breadcrumb in php – PHP Breadcrumb

What are breadcrumbs?

How to create the breadcrumbs in wordpress
How to create the breadcrumbs in wordpress

Well quite simply, in web page terms this refers to a list of links (usually at the top) that appear on a web page to tell the user where they are in the structure of the website they are viewing. This makes navigating backward and forward so much easier as they have the ability to skip directly back through whole categories, rather than just using the browser’s back button.

Example

The breadcrumbs.php include file:

Copy the code below, save it in a file called breadcrumbs.php and upload it to your site. This will print out a simple unordered list (<ul>) of the parent directories by directory name. The only edits you may wish to make to this file is to change the $ul_id='crumbs'; line if you wish to change the id of the <ul>. If you wish to add a background image or border etc to the <li> simply select it as #crumbs li{} and style. Script for Create breadcrumb in php:

<?
$ul_id='crumbs';
$bc=explode("/",$_SERVER["PHP_SELF"]);
echo '<ul id="'.$ul_id.'"><li><a href="/">Home</a></li>';
while(list($key,$val)=each($bc)){
$dir='';
if($key > 1){
$n=1;
while($n < $key){
$dir.='/'.$bc[$n];
$val=$bc[$n];
$n++;
}
if($key < count($bc)-1) echo '<li><a href="'.$dir.'">'.$val.'</a></li>';
}
}
echo '<li>'.$pagetitle.'</li>';
echo '</ul>';</pre>
?> This is some more usefull code
<pre><?
$url = $_SERVER['REQUEST_URI'];
echo $url;
echo "<br>";
$array = explode("/",$url);
echo $array[2]; ///which folder would you want to access ?
echo "size of array = ".sizeof($array)."<br>";
?>

Use above script for Create breadcrumb in php.

A script to insert in the HTML where you want the breadcrumbs to appear:

Edit the URI to point to where you saved the include file (once this is done it never needs to be changed again). Edit, ‘Insert Page Title’ to add the page title to the end of the breadcrumbs.

<?
$pagetitle="Insert Page Title";
include("http://www.yourdomain.com/breadcrumbs.php");
?>

Note: It would be useful to automatically print the page <title> as the last crumb but PHP cannot interrogate the DOM. Javascript would be required which we didn’t think appropriate as nothing would be returned if Javascript was turned off.

If you are looking for wordpress breadcrumbs then visit this link

wordpress breadcrumbs without any wp plugin

get page name from current url using php

Many people facing this problem for many kind of situations like, get page name from current url using php, Here we given php code for retrieve page name  … create dynamic javascript or css menu..,  navigation,  hit counter… for page..

get page name from current url using php

you can use set variable names for page.  second good way is use this function for print page name $_SERVER[“PHP_SELF”]

or if you want only page name than use this script


<?php

$pagename=pathinfo($_SERVER["PHP_SELF"]);
$pagename=$pagename["basename"];

echo $pagename;

?>

This is some more helpfull code…


$url = $_SERVER['REQUEST_URI'];
echo $url;
echo "<br>";
$array = explode("/",$url);
echo $array[2]; ///which folder would you want to access ?
echo "size of array = ".sizeof($array)."
";

URL unicode is another method for Creating Pretty or Clean Url and creating breadcrumbs

AJAX Login Demo

Here’s a demo of a login system built using Ajax. This is a cool implementation which allows a user to login, without having to refresh the page. Here are some advantages of the noted by author of the code:

  • User does not need to refresh the page to login.
  • User is notified instantly on incorrect username/password combination.
  • Overall user experience is more seamless.
  • Password is not sent in plain text ever (more secure than traditional system).
  • Javascript convenience with server-side security (uses PHP/MySQL).
  • Uses one-time use random seed to hash the password before sending (making interceptions useless)

Source code for the login form is also available on the site.

Link: JamesDam.com ≈ AJAX Login System Demo