PHP Web Development Tutorials

PHP Web Development Tutorials and Articles
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Recently, an obscure detail in the way PHP processes strings came to my attention. This is processed by code that checks for simple lists (like 1. blah 2. blah, or - blah - blah, etc.). However, an innocent call to in_array($x, array('1.', '0.')) had surprising and unexpected results: our...
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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...
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Most applications like browsers, text editors, etc. come built in with spelling suggestions, they highlight a possible incorrect English word (any language for that matter) and offers a list of suggestions when clicked or selected. Even, search engines provide spelling suggestions. Even you...
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PDO or PHP Data Objects is a data abstraction layer, i.e. it provides uniform methods to access different types of databases, as a result switching between or moving to a different database system is relatively easier. So, in simple language the code to access a SQLite db will also work for MySQL...
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If we intend to make an image gallery, and we would like to show the thumbails of the images, it wouldn't be a wise idea to show the original images with their height & width modified in the <img> tag, that would result in low image quality & higher download time. The solution to this problem would...
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Arrays are common to many programming languages. They are special variables which can hold more than one value, each stored in its own numbered 'space' in the array. Instead of having many similar variables, you can store the data as elements in an array.Each element in the array has its own ID so...
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To display the data by splitting them in pages is very important if you have chances of more records to be displayed. function page_records() { global $page,$pagecount,$perpage; $arr = $_GET; if (is_array($arr)) { foreach($arr AS $_arrykey => $_arryval) {
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Management of files Manipulating files is a basic necessity for programmers and PHP gives you a great deal of tools for creating, uploading, and editing files. When you are manipulating files you must be very careful because you can do a lot of damage if you do some errors. Common errors include...
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Cookies have long been used in PHP scripts, and are a very useful function. But what exactly are cookies? Maybe you have used then, but you still don't know exactly what they are. Or you are completely new to cookies? It doesn't matter, because in this tutorial I will show you exactly what cookies...
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How to optimize your PHP installation to handle large file uploads. Though PHP presents a very versatile and user friendly interface for handling file uploads, the default installation is not geared for working with files in excess of 2 Mega Bytes. This article will help you...
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What are Regular Expressions? A regular expression is a pattern that can match various text strings. Using regular expressions you can find (and replace) certain text patterns, for example "all the words that begin with the letter A" or "find only telephone numbers". Regular expressions are...
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Do a WHOIS query for any domain using the script below.:) <form method="POST" action= "<?$_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>
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Exceptions are used to change the normal flow of a script if a specified error occurs.Exception handling is used to change the normal flow of the code execution if a specified error (exceptional) condition occurs. This condition is called an exception.when an exception is triggered the current code...
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Every web-applications needs to transfer data from one page to another and one of the way of doing it is using sessions in PHP.. Sessions are a special type of variables used to transfer/carry data from one page to others.. In this tutorial i’ll be covering PHP version 4.1.0 and above.. Using...
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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...
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Morse code is a method for transmitting information, using standardized sequences of short and long elements, for the letters, numerals, punctuation and special characters of a message. The short and long elements can be formed by sounds, marks or pulses, and are commonly known as "dots" and...
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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 $month"; However, using single quotes forces variables to be...
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PHP 4.0.2 onwards libcurl support was added in PHP, libcurl is a free client library initially written by Daniel Stenberg which allows us to communicate with servers using a variety of protocols like HTTP,HTTPS,FTP,SMTP,LDAP, etc. In this article we'll be looking at enabling libcurl support in...
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Shell Sort function in PHP <? function shellsort($elements,$length) { $k=0; $gap=(int) ($length / 2); while($gap>1) { $k++;
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Let us say you have some images and want to watermark those images with some other gif, jpeg, png images or with some plain text on the fly in PHP. It actually looks tough but it is very simple. Let us take a real time example of profile picture option we have here at Go4Expert.com where if you...
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