Mukesh Chapagain's Blog » string

PHP: Parse Unparse String Array

Mukesh — Thu, 01 Jul 2010 07:28:49 +0000

Here is a quick tip on parsing and unparsing string and array in PHP.

You can parses the string into variables by using the parse_str PHP function.

Using parse_str function

void parse_str ( string $str [, array &$arr ] )

$str = The input string.
$arr = If the second parameter arr is present, variables are stored in this variable as array elements instead.

Using single parameter

$str = "first=value&arr[]=foo+bar&arr[]=baz";
parse_str($str, $data);
echo $first;  // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz

Using the second parameter

$str = "first=value&arr[]=foo+bar&arr[]=baz";
parse_str($str, $data);
echo ""; print_r($data); echo "";

The output will be:-

Array
(
    [first] => value
    [arr] => Array
        (
            [0] => foo bar
            [1] => baz
        )

)

You can unparse any array into string using the http_build_query function. This generates a URL-encoded query string from the associative (or indexed) array provided.

$data = array('foo'=>'bar',
              'baz'=>'boom',
              'cow'=>'milk',
              'php'=>'hypertext processor');

echo http_build_query($data); // foo=bar&baz=boom&cow=milk&php=hypertext+processor
echo http_build_query($data, '', '&'); // foo=bar&baz=boom&cow=milk&php=hypertext+processor

Hope this helps. Thanks.

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PHP: How to get integer or decimal from a string?

Mukesh — Thu, 29 Apr 2010 13:32:43 +0000

Suppose, I have a string with text and number and I only want the number. I don’t want the characters and text of the string.

Here is the way out:-

In this example, you will get only integer. It will omit all characters and text from the string.

$string = 'Nrs 89,994,874.0098';
echo preg_replace("/[^0-9]/", '', $string);
// output: 899948740098

This example prints decimal numbers removing all the characters from the string.

$string = 'Nrs 89,994,874.0098';
echo preg_replace("/[^0-9\.]/", '', $string);
// output: 89994874.0098

Hope this helps.

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jQuery: How to replace string, div content and image src?

Mukesh — Thu, 28 Jan 2010 05:05:51 +0000

In this article, I will be showing you how you can replace string, div content, and image src value with jQuery.

You can do this by replace() function in jQuery.

View Demo || Download Code

Here is the code to replace string. This will replace the ‘smile’ text with ‘be happy’.

var oldText = "Save Earth and smile!";
var newText = oldText.replace("smile", "be happy");

Here is the code to replace image src. The following code replaces ‘hills’ with ‘sunset’.

$(".img").attr("src").replace("hills", "sunset");

Here is the code to replace div content. The following code replaces the text ‘First’ with ‘This is the first’.

$("#one").text().replace("First", "This is the first");

Here is the full source code:



jQuery: Replace






	

	
	First div.
	

	
	Second div.

View Demo || Download Code

Cheers,

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Random number, string generation in PHP

Mukesh — Wed, 05 Mar 2008 08:02:22 +0000

Explaining/Illustrating different ways to generate random numbers and strings in PHP




RANDOM STRING GENERATION

Explaining/Illustrating different ways to generate random numbers and strings

Programmed By: Mukesh Chapagain

http://www.chapagain.com.np

http://blog.chapagain.com.np

*********************************/

//generating random numbers

//generating random numbers between 1 and 1000
$num = rand(1,1000);
echo "Random number from rand function: ";
echo $num;
echo "

";

//we can use mtrand() function for better random number generation
$mt_num = mt_rand(1,1000);
echo "Random number from mt_rand function: ";
echo $mt_num;
echo "

";

//generating a unique combination of numbers and letters
//works with PHP5 or higher
$unique = uniqid();
echo "Random string from uniqid function: ";
echo $unique;
echo "

";

//making the string more complex generated by uniqid function
//by using md5() function
//md5 function generates 32 character long string
//the function uniqid() works only with PHP5 or higher
$md5_unique = md5(uniqid());
echo "Random string from md5 to uniqid function: ";
echo $md5_unique;
echo "

";

//generating random string from a given string
//randomly shuffling a given string
$string = "Mukesh Chapagain";
$rand_string = str_shuffle($string);
echo "Random string from str_shuffle function: ";
echo $rand_string;
echo "

";

//generating random number from time() function
//the number changes every second
//this returns the current unix timestamp
$time = time();
echo "Random number from time function: ";
echo $time;
echo "

";

?>

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Fun with strings in PHP (Part 1)

Mukesh — Sun, 09 Dec 2007 04:48:39 +0000

Problem:

Concatenate and fetch data from two fields of database and then break it again.

Solution:

Posted below.

The description is included in the code.

You have to make a mysql database. The database part is as under:

create database test;

use test;

create table user(id int(9) not null auto_increment, first_name varchar(20), last_name varchar(20), primary key(id));

insert into user(first_name, last_name) values ("mukesh","chapagain");

PHP code below:

I have not used any loop (for, while, foreach, etc.) here to make the code simple. :-)



Fun with strings



"; // you will get the result as first_name,last_name
}
$newName = explode(",",$name); // this will make an array with each name as values

//print_r($newName);

// print the first name as
echo "First Name: " . $newName[0] . "
";

// print the second name as
echo "Second Name: " . $newName[1] . "
";

// you can find about how many elements/items are there with the commas
$count = count($newName);
echo "Count: $count 
";

// there is a function called 'implode' which will join array elements with a string
$newNameTwo = implode(" ",$newName); // this will print the names with spaces in between... before the names were separated with comma
echo "$newNameTwo 
";

?>

Happy PHPing!

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