25 PHP Interview Questions and Answers You Must Know

Here are some PHP questions and answers for experienced developers (with some beginner concepts covered).

 

Do you need to test a developer's PHP skills or have an internal PHP interview?

Some of the best developers in our network share their best PHP questions, answers and interview tips to help test a developer's knowledge and PHP experience.

If you are the one who interviews PHP developers, keep in mind that you should also ask these interview questions about a developer's experience and interview questions to test communication and management skills, or simply consult our Detailed Guide to hire PHP developers.

Without further ado, let's jump!
PHP interview tip # 1

     "One of the most important things that I observe is the creativity of the person I interviewed. I try to catch developers who constantly learn new things, are motivated by curiosity and are also very creative, not only in solving problems, but also in general. I mainly ask about PHP and PostgreSQL (I use this combo most of the time). "

 

PHP Interview Question 1

What is the difference between the include () and require () functions? 

 

Then, the process of the file, and the goes out of specific and may include, the clinic will cost you in the bear, if that can be included in the table, when it is said to involve as far as it can be to jump up to the next level and the next step will pass to execute the sentence.

 

How can we get out of a client is the IP address?

This problem may candidate to create and show you how playful is because there are not many options. $ _SERVER [ 'REMOTE_ADDR "]; the easy solution is not able to write only the question of the candidate's line of x.

 

PHP Interview Question # 3

What is the difference between the unset () and unlink ()

unset () sets variable "end" while unlink () deletes a file from the file system must pass.

PHP Interview Question # 4

Why is it that the output of code:

$ A = '1';
$ & $ A = b;
B $ = "$ 2 B ';
$ voice by ".". $ B;

PHP developer Laszlo Surý Sea

Tip # 2 PHP Interview

    "During an interview of a candidate ask potential to understand how they are updated with the new language features a very basic level of understanding. In my opinion, this is a good developer to define what may happen in the future." ~ Agli pancreatic: Lead Developer

PHP Interview Question # 5

The error of such as differ principally in PHP, and see that this figure

PHP in three main types of errors:

    3 - simple, non-critical errors that were not met, and it is executed. Under The data are not accessing an undefined variable.

    Warning - mistakes rather than earlier, but the execution's continue. Many, therefore, does not include () a file that does not exist.

    Fatal - this type of termination of this error leads to death, since it is occurs. An example of the largest losses we'll be accessing it from nothing into something, or require () is not a revision.

The understanding of what is going on, however, in the kinds of the error of the developers very happy with it and do not understand the help of the program, and what is meant by debugging to look for.

PHP Interview Question # 6

The crisis sent for blade?

    Buy displays the data submitted as part of the URL: After this information, as it's shown encoded by the petition.
    Buy can handle a maximum of 2048 characters POST has to subnavigation.
    Only the ASCII characters suffer me to the knowledge of GET, POST has, consist of no exceptions, is not given and granted to binary.
    To retrieve information when you get is normally used, and update the log to match.

HTTP protocol is most important is that the fundamentals for the PHP developer, and the difference is an essential part of it having been summoned by pretiosive Post.

PHP Interview Question # 7

How to control the error reporting php?

Check if "display_errors" is equal to "over" in php.ini or do "ini_set ( 'display_errors', 1)" in the script.
Then include "error_reporting (E_ALL)" in the code, to show error messages in all sorts of writing execution.


Question # 8 PHP Interview

What Features?

Features a mechanism that allows you to create reusable code in a place where many languages ​​like PHP inheritance is not supported. And courteously informed from the instantiated, not of his own accord.

Heavy is a powerful developer features that it knows about the language (s) in this work, and to deposit such features.

Question # 9 PHP Interview

Can the value of the constant change in the execution of the letter?

No, because once changed will not be based on declared value with PHP's execution.

PHP Interview Question # 10

You extend determined by the final race?

You are unable even extend fi nal defined also includes the kind of. If you want peace declaration or the kind of child's kind of the same.

PHP Interview Question # 11
What is __construct () and __destruct () PHP in kind are there?

All the ways in which we see things, and have built thee a PHP Constructor Destructor. After the artist once said that a new instance is created in general and to initialize it's the kind of properties. The Destructor method takes no parameters.

Comparable to these two, the white in PHP is to say, should know how to out of it are the basics OCF, in PHP.

PHP Interview Question # 12

In order to get the number of elements in an array?

The count () function is the returning number of elements in the array.

Your understanding array related helper functions, and it is important for the PHP developer.

Agli pancreatic lead developer PHP

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