Now you have learnt to set a cookie in php. Now the next thing is to retrieve the value stored in cookie.
With the following code you can retrieve the value stored in cookie.
To get the value stored in cookie we are using global variable $_COOKIE.
Here we are getting the value stored in cookie to the variable $mycookie.
Here is full code to check & print the value of the cookie.
Hi,
You might be searching for how to set a raw cookie in php. So here is a simple example which shows how to set a raw cookie.
To set a cookie use the function "setrawcookie"
setrawcookie() is exactly the same as setcookie() except that the cookie value will not be automatically urlencoded when sent to the browser.
This function accepts different number of arguments or parameters as setcookie. You can see the php reference manual of setcookie function here for more details.
In the following example we are passing 3 parameters
1) cookie name - its the name by which cookie will be identified.
2) cookie value - its the value stored in cookie.
3) expiration time - the time till the cookie will be available, after that it will be destroyed.
You can set the cookie by using above function.
more details can be found here.
You might be searching for how to set a cookie in php. So here is a simple example which shows how to set a cookie.
To set a cookie use the function "setcookie"
Note that the value portion of the cookie will automatically be urlencoded when you send the cookie, and when it is received, it is automatically decoded and assigned to a variable by the same name as the cookie name.
This function accepts different number of arguments or parameters. You can see the php reference manual of setcookie function here for more details.
In the following example we are passing 3 parameters
1) cookie name - its the name by which cookie will be identified.
2) cookie value - its the value stored in cookie.
3) expiration time - the time till the cookie will be available, after that it will be destroyed.
You can set the cookie by using above function.
more details can be found here for more details.
Hi,
Hi,
How can we know the number of days between two given dates using MySQL ? or find the difference between dates using MySQL ?
Do you ever faced this question in technical interview or technical test?
I know many of you have faced this....... :)
Here is a simple function which can be used to find the number of days between two given dates in MySQL.
Syntax - DATEDIFF(firstdate,seconddate)
so internally it will calculate the difference in MySQL by doing "firstdate minus seconddate", so if firstdate is greater than sencoddate then output will be positive and if firstdate is less than seconddate then output will be negative.
eg. if you use this function as
SELECT DATEDIFF('2009-11-19', '2009-10-15');
in MySQL
then you will get output as 35.
And if you pass parameters as
SELECT DATEDIFF('2009-10-15','2009-11-19')
then you will get output as -35.
If you know any other way to find the difference between dates then comments are always welcome.
Dont forget to tell your friends about http://programming-in-php.blogspot.com
Many times when you go for an interview or technical test you may find this question
Whenever it is required to get some input url from user then the first things comes is check whether that url is working and valid or it is not working.
Here is a simple function which can be used to verify the liveness of the url.
Just pass the url to this function and it will tell you whether the url is working and valid or invalid.
In the function "check_url" we are going to open the given url with "fopen".
If its opened then return true else return false.
Now we are going to use this function.
you can pass the url from the GET or POST method to the function.
Here we are going to specify it directly in the code.
So we are asking our code to open the url http://www.chaprak.com with our function.
so after execution it will show the message as
http://www.chaprak.com is a valid URL.
See its very simple to check the validity of the url in php.
Full source code to try is here -
If you have any ideas and suggestions to improve this function then comments are always welcome.
Dont forget to tell your friends about http://programming-in-php.blogspot.com
Here is a simple function which can be used to count the total number of words present in a string in php.
For this function we are going to use inbuilt functions in php like count, explode, trim.
Function is very simple, it accepts the text.
Then we are checking if there are any extra spaces before and after the string, if it is there then removing that with trim function.
Then we are using count and explode function.
Explode will divide the text into array. (for more information on how explode works visit our post Split string with php explode function and print array)
Then we are counting the total number of array elements by using count function.
Now we are actually going to use this function.
Here is a full source code to try it out.
If you have any ideas and suggestions to improve this function then comments are always welcome.
Have you ever came across a situation where you need to truncate the large text and show the "read more.." link to redirect user to read the full post ?
I know you might be searching for a function to show read more link in php.
Here is our simple function which can be used to show the "Read more.." links dynamically.
The above function can be used anywhere to show read more links with dynamic mysql queries.
How to use this function ???
Here is a simple example to do this
First you will need to create the connection with the database.
Connection settings are stored in "connect.php" file
This will output your article text with proper linking to original post with read more link.
Even you can customize the truncate function for more security check and customizing your display.
Share with friends if you liked it.
So you installed WampServer on Windows.
Many of us use windows operating system and want to know how to use php on Windows operating system ?
For this there is a very simple and useful solution. Even you don't have to setup & configure many things.
Following things are required for using php on windows
Hi Friends, programming-in-php.blogspot.com is a place to share experience and knowledge.
At many places we require the contact us or feedback form to get some input from the user or to get some feedback from the user.
Today i will be showing you how to create a very simple feedback form or contact us form in php with the mail function and without any database.
1) First we will be creating a simple form to accept the user input like name, email and their message or feedback or query.
Dear Admin,
";Message from : $username
";Email id : $email
";Message : $msg
";
sometimes it is required to get the current working directory of the script.
so to get the current working directory in php this is a small function.
This code can be used to show some random quotes or random links every time the page is loaded or refreshed.
$quote = array(
1 => "Random Quote 1",
2 => "This is sample quote 2",
3 => "check http://programming-in-php.blogspot.com",
4 => "it really works",
5 => "wooooooooooooooooooooow",
6 => "I am on twitter"
);
$randnum = rand(1,6);
echo "Random Quote - $quote[$randnum]";
?>
If it is needed to Split string in php and then use those splitted values for some processing in that case you can use this script which Splits string with php explode function and prints array.
$string = "Contents of the string can be splitted by explode function.";
$splitted = explode(" ",$string);
$cnt = count($splitted);
$i=0;
while($cnt > $i)
{
echo "$splitted[$i]";
echo "\n";
$i++;
}
?>
Caution: While using Javascript and an alert message is fired using a timer, then keep the timer for atleast 10 seconds, i.e. 10000. Else, the system will hang. I experienced it recently.
Please note.
This part is for Horizontal Menu using CSS.
The below one will come under the Head Tag.
The below one will come under Body Tag.
This code was taken from http://www.w3schools.com/css/tryit.asp?filename=trycss_float5
This is very simple and useful php script if you want to display some random quotes each time a page is visited or refreshed.
$quote = array(
1 => "Random Quote 1",
2 => "This is sample quote 2",
3 => "check http://programming-in-php.blogspot.com",
4 => "it really works",
5 => "wooooooooooooooooooooow",
6 => "I am on twitter"
);
$randnum = rand(1,6);
echo "Random Quote - $quote[$randnum]";
?>
Sometimes it is required to show the contents of some text file to the web page. So we can change those contents easily without any problem.
First we will create a simple text file, with some contents.
name it as "test.txt"
These contents are saved in test.txt file.
I am showing you the contents of some text file.
Its very useful to show the contents of the text file in a browser.
$file1="test.txt";
if (file_exists($file1))
{
$file = fopen("test.txt", "r");
while (!feof($file))
{
$display = fgets($file, filesize("test.txt"));
echo $display . "
";
}
fclose($file);
}
else
{
echo "Error occured ! ! ! Try again or report it to us";
}
?>
?>
This is a small program which generates a factorial of a number in php.
function doFactorial ($x) {
if ($x <= 1)
return 1;
else
return ($x * doFactorial ($x-1));
}
while($i<100)
{
print $i." --> ".(doFactorial ($i)) . "
";
$i++;
}
?>
sometimes it is required to restrict the length of the textarea so that user should not enter characters beyond a certain limit.
For this we can make use of this simple javascript.
First we will create a 2 textarea.
function restrict(mytextarea) {
var maxlength = 15; // specify the maximum length
if (mytextarea.value.length > maxlength)
mytextarea.value = mytextarea.value.substring(0,maxlength);
} // -->
Today we will be seeing a small easy function to generate a password of specified length.
For this we will be creating a function called "genpwd()"
Now this function is ready, now we want to display the generated password of our specified length.
For this we will print the function value, specifying the length of the password to be generated.
The full working sample example is here, you can copy and paste this code to try it out. It will generate a random string everytime you refresh the page.
function genpwd($cnt)
{
// characters to be included for randomization, here you can add or delete the characters
$pwd = str_shuffle('abcefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890@#%$*');
// here specify the 2nd parameter as start position, it can be anything, default 0
return substr($pwd,0,$cnt);
}
echo genpwd(10); // specify the length of the generated password
function passwordGenerator($length = null)
{
$pass = md5(time());
if($length != null) {
$pass = substr($pass, 0, $length);
}
return $pass;
}
echo passwordGenerator(6);
function generate_password($len = 8) {
$chars = str_split('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!@#');
$pwd = '';
for($i=0; $i < $len; $i++)
$pwd .= $chars[rand(1, $sizeof($chars)) -1];
return $pwd;
}
Sometimes we require that when the users click on a textarea at that time all the text should get selected.
This can be done with a small javascript.
Hi guys,
Hello,
Today we will be seeing a javascript which will help us to show how many characters are remaining for a textbox or textarea,As soon as the user starts typing in a textbox or textarea, then we will show how many characters are remaining for entering into the textbox.
Here we are creating a simple textbox, and we are specifying the "maxlength" of the textbox to 20.
Here is a way to convert numbers to words (upto one lakh). It can be extended as per your requirement as well. This is useful for billing etc. Note that only one parameter should be input, and not both. The second parameter is used only for some internal recursive calling.
Hi,
Hi friends,
We always require some kind of login box for any system which has members.
Hi,
Here you will find lots of useful and ready to use free php scripts and codes in php, css, ajax, javascript and many more.....
keep visiting this blog.
Whenever you are working on a project you might need to create a database connection and select a database.
While working on a project you might need a dynamic select box to be generated from the values present in the database.
So this example gives you a simple way to populate a select box with the values present in the database.
Consider a example - there is a table "article" in your database "mydb"
So for this first we need to create a connection with the database and we need to select the database.
For this we will create a file called "connect.php"
replace the values with your actual values as per directed in code
After that we will write our main code in a file called "myselect.php"
And its over. Its very simple.
Try it out, if you face any problem then comment here, i will help you.
Show a-z links on a page for pagination
You can replace $PHP_SELF with the filename for which you want to generate this pagination.
Ofcourse this code doesnt shows the logic to display actually pagination, but instead of taking characters from a-z in a array this is the simple way to show a-z characters for processing.
Soon even i will publish the code to do actual pagination.
[Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in]
If you are user of the Firefox web browser then this is the useful place for you.
A Great addon for the Firefox ! ! !
If you are want to understand how the page is displayed in firefox browser, how it is divided and showed then you can use the firebug addons for better understanding of the code.
Install this addon from the following URL.
https://addons.mozilla.org/en-US/firefox/collection/firebug_addons
PHP (Hypertext Pre-Processor)
If you are a beginner to php then there are some useful resources available on the net to start with.
Hi everyone,
