What is the difference between $message and $$message?

What is the difference between $message and $$message?


They are both variables. But $message is a variable with a fixed name.
$$message is a variable who‘s name is stored in $message.

 For example
 if $message contains ―var1, $$message is the same as $var.

Detailed Code :

<?php
//Dear Techies this Script has one simple variable ie
$car_name = 'Ford';
//now  assign variable $car_name to $get_car_name
$get_car_name = $car_name;
echo $get_car_name.'<br>';
//answer is : Ford;

//this is simple variable..
//we can get the same answer in different technique..this can be done by
//using reference variable or variable of variable or using $$ dollar sign
//check this

$get_car_name_using_ref_var = 'car_name';

echo $$get_car_name_using_ref_var;
?>

I think now you can understand the difference between variable and reference variable in PHP

if u like this post, please put your valuable comments..

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Upload File Using FTP

  Upload Single file using FTP in PHP.

// FTP access parameters
$host = 'ftp.example.org';
$usr = 'example_user';
$pwd = 'example_password';
 
// file to move:
$local_file = './example.txt';
$ftp_path = '/data/example.txt';
 
// connect to FTP server (port 21)
$conn_id = ftp_connect($host, 21) 

or die ("Cannot connect to host");
 
// send access parameters
ftp_login($conn_id, $usr, $pwd) or die("Cannot login");
 
// turn on passive mode transfers (some servers need this)
// ftp_pasv ($conn_id, true);
 
// perform file upload
$upload = ftp_put($conn_id, $ftp_path, $local_file,

 FTP_ASCII);
 
// check upload status:
print (!$upload) ? 'Cannot upload' : 'Upload complete';
print "\n";
 
/*
** Chmod the file (just as example)
*/
 
// If you are using PHP4 then you need to use this code:
// (because the "ftp_chmod" command is just available 

in PHP5+)
if (!function_exists('ftp_chmod')) {
   function ftp_chmod($ftp_stream, $mode, $filename){
        return ftp_site($ftp_stream, sprintf('CHMOD %o %s',

 $mode, $filename));
   }
}
 
// try to chmod the new file to 666 (writeable)
if (ftp_chmod($conn_id, 0666, $ftp_path) !== false) {
    print $ftp_path . " chmoded successfully to 666\n";
} else {
    print "could not chmod $file\n";
}
 
// close the FTP stream
ftp_close($conn_id);

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Regular Expressions Concept In PHP Part 1

What is regular expression ?

Regular expression originating from the Unix system . where a program was designed , called grep. To help the developers to work on string and manipulate the strings.

Regular expression is search for a pattern in a given string or text. these search pattern written using a special format which a regular expression parser understand.

Regular expression is a very useful tool for developers, they allow to find , identify or replace text, word or any kind of character.

Regular expression is also called REGEX or REGEXP.

Regular expression syntax

Regular Expression                 Will match
1)     Foo                               this is a string, the string “foo”
2)      ^foo                             “foo”  at the start of a string
3)      Foo$                             “foo” at he end of a string  
4)      ^foo$                           “foo” when it is alone on a string
5)      [abc]                              a,b, or c
6)      [a-z]                               any lower case leter
7)      [^A-Z]                           any character that is not uppercase letter
8)      (gif|jpeg)                        matches either gif or jpeg  
9)      [a-z]+                            one or more lowercase letters        
10)   [0-9.-]                           any numbers, dot or minus sign      
11)   ^[a-zA-Z0-9_]{1,}$       any word of at least 1 letter, number or underscore
12)    ([wx])([yz])                  wy, wz, xy, or xz    
13)   [^a-zA-Z0-9]                any symbols but not any letter or number  
14)   ([A-Z]{3}|[0-9]{4})       Matches three letters or four numbers
a
    Dont Forget to leave Your comments...
 
    Part 2 will coming soon.....

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Language of the year

Before Entering to the programming world, we should know the index of programming language. As like Business ,there is a competition between all programming languages. The following link that i am providing will guide the developers to check whether their  programming skills are still up to date or to make a strategic decision about what programming language should be adopted when starting to build a new software system

                              

  TIOBE Programming Community Index for November 2012

                         Source : http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html

Position Nov 2012	Position Nov  2011	Delta in Position	Programming Language	Ratings Nov 2012	Delta Nov  2011	Status
1	2		C	9.224%	+1.90%	A
2	1		Java	17.455%	-0.42%	A
3	6		Objective-C	10.383%	+4.40%	A
4	3		C++	9.698%	+1.61%	A
5	5		PHP	5.732%	-0.36%	A
6	4		C#	5.591%	-1.73%	A
7	7		(Visual) Basic	5.032%	-0.01%	A
8	8		Python	4.062%	+0.45%	A
9	10		Perl	2.182%	+0.10%	A
10	11		Ruby	1.739%	+0.24%	A
11	9		JavaScript	1.278%	-1.29%	A
12	16		Delphi/ Object Pascal	0.995%	+0.12%	A
13	13		Lisp	0.951%	-0.23%	A
14	14		Pascal	0.881%	-0.11%	A
15	23		Visual Basic  .NET	0.769%	+0.24%	A-
16	19		Ada	0.662%	+0.04%	B
17	12		PL/SQL	0.632%	-0.81%	B
18	18		Lua	0.631%	0.00%	A-
19	15		MATLAB	0.620%	-0.34%	B
20	24		Assembly	0.585%	+0.06%	B

Long term trends

The long term trends for the top 10 programming languages can be found in the line diagram below.

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Hello Techies

Hello Techies, I ll get back on this blog very soooon with new ideas till then any addition or contribution would be a welcome. ........get in touch

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