PHP Web Development Tutorials

PHP Web Development Tutorials and Articles
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Ill start by giving the code to the guest book then I will give a step by step on what each part does. <?php if(isset($_POST) && isset($_POST)) { if($_POST != "" && $_POST != "") { $F_D = getdate(); $FT = $F_D."/".$F_D."/".$F_D;
Cookies have long been used in PHP scripts, and are a very useful function. But what exactly are cookies? Maybe you have used then, but you still don't know exactly what they are. Or you are completely new to cookies? It doesn't matter, because in this tutorial I will show you exactly what cookies...
What are Regular Expressions? A regular expression is a pattern that can match various text strings. Using regular expressions you can find (and replace) certain text patterns, for example "all the words that begin with the letter A" or "find only telephone numbers". Regular expressions are...
Many times it is required for us to calculate the time remaining and display it in a very understandable format like days,weeks,hours etc. Here is a function i wrote to do the same. //FUNCTION FOR TIME LEFT function time_left($integer) { $seconds=$integer; if...
All PHP coders are aware of the mail() function in PHP, which can be used to send mails. On Linux systems we ussually have Sendmail program installed, if someone is facing a problem sending mails with mail() function, they can alternatively use Sendmail to send mails. For sending mails using...
I never recommend using " (double quotes) when programming with PHP. Always use ' (single quotes) unless you need the features of " (double quotes). You might think it's much easier to write code as: echo "Today is the $day of $month"; However, using single quotes forces variables to be...
There are times when we require to put a calendar in some web appplication of ours,writing the code to generate a calendar from scratch is painstaking and waste of time. So PEAR comes to rescue with its Calendar package. The package gives a ton of features, below you'll find a simple program to...
The PHP Extension and Application Repository (PEAR) is an open source structured library of packages for PHP developers. These packages provide routines which solve problems PHP developers regularly face: sending structured e-mail (such as an HTML attachment), interacting with different databases...
Manier times we require to create logs of various activities/errors in our web applications, so here we'll look into how to achieve that. Logging data to a file in PHP can be as simple or as complex as you want to make it. Break it down, though, and it all comes down to these three simple lines...
PHP offers one alternative - a special Log class that comes courtesy of PEAR, the PHP Extension and Application Repository ( In case you didn't know, PEAR is an online repository of free PHP software, including classes and modules for everything from data archiving to XML...
How to show the no. of users online on your site using PHP & MySQL. Step1: Creating the database Create a new table called 'useronline', with 3 fields inside a table. The fields are timestamp, ip and file. Below is the SQL to create the table. CREATE TABLE useronline ( timestamp...
Do a WHOIS query for any domain using the script below.:) <form method="POST" action= "<?$_SERVER?>"> <label>Do a WHOIS query:</label> <P> <INPUT name="domain" SIZE="20" MAXLENGTH="22"> <INPUT TYPE="SUBMIT" VALUE="Check name"> <INPUT TYPE="RESET" VALUE="Clear"> </P> </FORM>
Title says it all but to reemphasize that below PHP code block validate an email address. Its always good to have a client side validation for faster user responses but backend check is also needed for user not having client side scripting on. <?php function emailsyntax_is_valid($email) { ...
Many times we require to format a number to output with thousand place comma separator, here is a function will help you do so. function numcomma ($value) { if(strpos($value,".")) { $decimalval = substr($value,strpos($value,".")+1); $value =...
Shell Sort function in PHP <? function shellsort($elements,$length) { $k=0; $gap=(int) ($length / 2); while($gap>1) { $k++;
Here's a function which will format the passed bytes into KB,MB,GB...appropriately. function GetSize ($sizeb) { $sizekb = $sizeb / 1024; $sizemb = $sizekb / 1024; $sizegb = $sizemb / 1024; $sizetb = $sizegb / 1024; $sizepb = $sizetb / 1024; if ($sizeb > 1) {$size =...
Many times its required that we truncate a long string and add ellipsis to the end of the truncated string. Here's a function which does exactly that. function truncate( $varb, $num ) { $dnum = intval($num); if (strlen($varb)>$dnum) { $nvarb = substr($varb, 0,...
File upload is very common requirement of many web sites. We may require to upload pictures online to websites. Image upload is very common requirement and many sites are using this to allow members or visitors to upload files. We will learn how to upload multiple files using a single form. This...
Mysqli extension provides us to access the functionality offered by MySQL 4.1 and above.The i in the function name stands for improved (MySQL Improved). The mysqli extension is built using the PHP extension framework.The MySQLi library is much more optimized and quicker than the previous MYSQL...
File Transfer Protocol or popularly known as FTP has been a de facto standard for transferring files for many years, can be used in many programs / utilities like backup programs, etc. PHP is being increasingly used in writing scripts for maintenance and other purposes and the FTP extensions...