PHP Interview Questions for 3 Years Experience

PHP Interview Questions for Experience –

Question 1 – Please Define Magic method in PHP?

Answer – A magic methods are special built-in methods that are called automatically when certain conditions are met in PHP.

Every magic method starts with a double underscore (  __ ) in PHP.

PHP has several magic methods as –

• __construct()
• __set()
• __destruct()
• __debugInfo()
• __toString()
• __get() etc…

Question 2 – What are the different types errors in PHP?

Answer -PHP has main 3 types of errors given as follows-

• Warning: In PHP, a warning is an error that is displayed to the programmer while the script is running.
• Notice: A notice is not error. It is not displayed to the programmer.
• Fatal error: Fatal error is the most critical type of error. It will cause immediate termination of the script/program.

Question 3 – How will you get the IP address of user in PHP?

Answer – $_SERVER[‘REMOTE_ADDR’].

It is super global variable of PHP.

Question 4 – What do you understand about LAMP?

Answer – LAMP stand for Linux, Apache, MySQL and PHP. It is a Open Source Web Server for developing the web applications such as XAMPP.

Question 5 – How can you destroy the session and unset the variable of a session in PHP?

Answer –

<?php
session_destroy(); // destroy session

session_unset(); // remove all session variables
?>

Question 6 – How will you submit form without a submit button?

Answer – Using JavaScript code, we can call the document.form.submit() function to submit the form.

Question 7 – What are the different type of tables in mysql?

Answer –

1. MyISAM
2. Merge
3. Heap
4. InnoDB
5. BDB
6. ISAM

Question 8 – How can you enable error reporting in PHP?

Answer –

• First we check “display_errors” is “on” in the php.ini or
• declare “ini_set(‘display_errors’, 1)” in our script.
• Then, include “error_reporting(E_ALL)” in your code.

The above code will displayed all types of error messages.

Question 9 – You can change the value of a constant during the script’s execution?

Answer – No, A constant value cannot change if it’s declared during the PHP execution.

Question 10 – How can you get the number of elements in an array?

Answer – Using count() function –

<?php
$names=array("Ashok","Shivam","Haq"); // array
echo count($names); // the output is 3
?>

PHP Interview Questions for 3 Years Experience