1) What is PHP?PHP is a web language based on scripts that allow developers to dynamically create generated web pages.2) What do the initials of PHP stand for?PHP means PHP: Hypertext Preprocessor.3) Which programming language does PHP resemble?PHP syntax resembles Perl and C4) What does PEAR stand for?PEAR means “PHP Extension and Application Repository”. It extends PHP and provides a higher level of programming for web developers.5) What is the actually used PHP version? Version 7.1 or 7.2 is the recommended version of PHP.6) How do you execute a PHP script from the command line? Just use the PHP command line interface (CLI) and specify the file name of the script to be executed as follows: PHP script.php7) How to run the interactive PHP shell from the command line interface? Just use the PHP CLI program with the option -an as follows: PHP -a8) What is the correct and the most two common way to start and finish a PHP block of code?The two most common ways to start and finish a PHP script are:<?php [ — PHP code—- ] ?> and <? [— PHP code —] ?>9) How can we display the output directly to the browser? To be able to display the output directly to the browser, we have to use the special tags <?= and ?>.10) What is the main difference between PHP 4 and PHP 5?PHP 5 presents many additional OOP (Object Oriented Programming) features.11) Are multiple inheritances supported in PHP?PHP supports only single inheritance; it means that a class can be extended from only one single class using the keyword ‘extended’.12) What is the meaning of a final class and a final method?‘ final’ is introduced in PHP5. The final class means that this class cannot be extended and a final method cannot be overridden.13) How is the comparison of objects done in PHP? We use the operator ‘==’ to test is two objects are instanced from the same class and have the same attributes and equal values. We can test if two objects are referring to the same instance of the same class by the use of the identity operator ‘===’.14) How can PHP and HTML interact? It is possible to generate HTML through PHP scripts, and it is possible to pass pieces of information from HTML to PHP.15) What type of operation is needed when passing values through a form or a URL? If we would like to pass values through a form or a URL, then we need to encode and to decode them using htmlspecialchars() and urlencode().
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