PHP Interview Questions & Answers

Showing 10 of 109 questions | Page 4

PHP technical interview questions and answers are essential for candidates preparing for web development roles. PHP powers millions of websites and content management systems, so companies often evaluate your knowledge of syntax, arrays, sessions, cookies, form handling, OOP concepts, and database connectivity. Popular companies like TCS, Wipro, Infosys, Capgemini, Cognizant, and Accenture regularly include PHP questions in coding rounds and technical interviews. This guide explains the most frequently asked PHP interview questions with simple examples and clear definitions. Whether you are a fresher preparing for campus placements or an experienced developer, these questions will help you understand PHP concepts better. You can also download PHP interview PDFs and practice mock questions for better preparation.

Web developers should complement their PHP skills with MySQL database knowledge and JavaScript programming for full-stack development

Showing 10 of 109 questions

Per page:

31. How come the code works, but doesnt for two-dimensional array of mine?

Any time you have an array with more than one dimension, complex parsing syntax is required. print “Contents: {$arr[1][2]}” wouldve worked.

32. How can we register the variables into a session?

session_register($session_var); $_SESSION['var'] = ‘value;

33. What is the difference between characters 23 and \x23?

The first one is octal 23, the second is hex 23.

34. How can we submit form without a submit button?

We can use a simple JavaScript code linked to an event trigger of any form field. In the JavaScript code, we can call the document.form.submit() function to submit the form. For example:

35. How can we create a database using PHP and mysql?

We can create MySQL database with the use of mysql_create_db($databaseName) to create a database.

36. How many ways we can retrieve the date in result set of mysql using php?

As individual objects so single record or as a set or arrays.

37. Can we use include (”abc.php”) two times in a php page “makeit.php”?

Yes.

38. I am writing an application in PHP that outputs a printable version of driving directions. It contains some long sentences, and I am a neat freak, and would like to make sure that no line exceeds 50 characters. How do I accomplish that with PHP?

On large strings that need to be formatted according to some length specifications, use wordwrap() or chunk_split().

39. whats the difference between htmlentities() and htmlspecialchars()?

htmlspecialchars only takes care of <, >, single quote ‘, double quote ” and ampersand. htmlentities translates all occurrences of character sequences that have different meaning in HTML.

40. What is the maximum length of a table name, a database name, or a field name in MySQL?

Database name: 64 characters Table name: 64 characters Column name: 64 characters