Category: Php Programming course

There are hundreds of functions in PHP, but most of them are rarely or never used. In the following you will find the most important PHP functions. For a complete list of features, see the PHP.net Function Guide . array functions array_key_exists($key, $array)  - Check if a key exists in an array. arsort($array)  - Sort an array in reverse order and [...]

php constant The value of a constant is, unlike a variable, no longer changeable once it has been defined. This is useful, for example, to define fixed, immutable values, such as the maximum length of a post or the version of your script. Constant Syntax - PHP Tutorial To define a constant, you use the keyword const, You can [...]

php cookies Cookies, like sessions, have the ability to capture specific data during a sequence of site views. However, cookies can also be used to store data beyond the session (eg 100 days after saving) because cookies are stored as a file on the visitor's computer. However, the visitor may, of course, prohibit us from [...]

php file upload The following script will explain how to enable a simple file upload. Your visitor can select a file from their local hard drive and then upload it to your webspace. For example, visitors can upload images to your website. Form for file upload Your file upload form may look like this: <form action="upload.php" method="post" [...]

php include require In the previous tutorials, you learned the basics of using PHP. At the end of our introduction, here are some tips on how to structure your code clearly. Split website into several files PHP has some features that allow you to split your scripts into several files. This is very helpful in many cases. Suppose [...]

php functions So far, we have mainly used functions that provide PHP. This tutorial is about writing and using your own functions. Often you have a certain programming problem that occurs in several places, for example, you want to calculate values of a certain mathematical function in several places of your scripts. Here every time to copy [...]

php session HTTP is a stateless protocol, meaning information is not cached between the various views of a visitor. This is, of course, impractical if we need to store certain information about a visitor, for example, which username he logged in with. To solve this, you use PHP sessions. Technical background - PHP Session Sessions give you [...]

php The email function of PHP is very handy because it allows us to send form data or create entire newsletter scripts. You can also use this procedure for a guestbook, for example, if you receive an email when someone enters the guestbook. Important If you perform this function on your computer, you will normally receive [...]

How to write files with example in PHP To be able to write to text files, PHP has the function file_put_contents ($ filename, $ data), As the first argument, the function expects the file name, as second the data which one wants to write into the file. If the file does not exist yet, it will be created. If [...]

read files In this part of the PHP tutorial, you will learn how to do file operations with PHP. This article is about reading files, in the next article about writing files. Read Files using file_get_contents() The easiest way to read a file is by using the function file_get_contents ($ filename), For example, create a text file in your [...]

Arrays are an important concept in PHP. An array is an ordered list. For example, a list of numbers or a list of text (strings). For example, we can use an array to group the days of the week into a list, or all users to our page. In the following, you will learn how to define arrays, how to [...]