MySQLi (MySQL Improved) is the new driver which is used to connect to MySQL databases exclusively in PHP. This improved extension has a lot of advantages over the old mysql_query statements. You can take advantages of the new functionality when you upgrade from mysql to mysqli. One of the major advantage you can get is the ability to use the…
PHP
To connect to MySQL databases in PHP, the age old mysql_connect API is no longer used. It has been deprecated and will not be supported in future PHP versions. So, there are recommendations everywhere for us to use either PDO (PHP Data Object) or mysqli_connect. Using PDO (PHP Data Objects) PDO supports multiple database types. You can connect to different…
About Object Oriented Programming Object oriented programming (OOP) was introduced in PHP 5. This new technique of programming allows us to define classes and create objects. The aim is to reduce rewriting of the same code again and again while increasing reusability of the available code. OOP also makes it simper to edit and update our code. OOP looks a…
PHP headers are used to send a message to the browser. The message can be something like forward to a new URL, give a 404 error, tell visitors that the page has moved permanently or give a 301 moved permanently status, tell the content type of the page, tell when the page expires or prompt the user to start downloading…
In PHP, you can perform all types of file operations. You can open or create any type of file that you want. You can also read files, write to them or update their content. There are many other things that you can do like forcing a file download while opening it. For websites, files are used to store data. You…
When you have to allow users to upload files using HTML forms and PHP, it is quite simple. All you have to use is $_FILES super global and it will upload the file. You can also set additional options like giving the uploaded file a file name and selecting the upload directory. You can also verify whether the uploaded file…
PHP is perfect for handling the data collected by HTML forms. You can process the forms and use the data in PHP. The data can then be emailed or stored in a database. The information then can be processed using POST or GET method. The method is specified when creating the form in HTML. Depending upon this method, you have…
In PHP there exists what is known as super global variables. These variables are usable from anywhere or any php file or script. They do not need to be pre-defined. Their values also need not be specified. They are used to hold certain values such as ip addresses, domain names, referrers etc. These superglobals are associative arrays. $_SERVER This is…
Cookies are used to store values and information. They are stored by the browser on the client’s side. So you can access cookies from multiple pages of your website. When they are stored, the data is URLencoded and they are decoded during retrieval. While setting a cookie, you can set a name, value, expiration date and other additional details like…
If you have to send email in PHP, then simply use the in-built mail() function. It must be enabled by your PHP web host. It normally is. If you need to see whether PHP mail is activated or not, just try the simplest example from below. If the mail is delivered, then the host supports PHP mail. Here’s a simple…