Indexed Array – An indexed array is one that has a numeric index. The current array element’s value is assigned to $value in each pass, the array pointer is moved by one, and the next element is processed in the following pass. Functions in PHP can only create and access variables within their own scope by default.
In this blog, you can have a look at PHP interview questions that are helpful for 1 year, 2 years, 5 years of experience as a PHP developer. But before we begin, let’s have a quick look at the facts about PHP. PHP developers are in high demand due to the difficulty involved in learning the language.
What is the use of the function ‘imagetypes()’?
If a resource is not specified then last opend database is closed. The split() function will divide a string into various elements, the boundaries of each element based on the occurrence of pattern in string. Eregi() − The eregi() function searches throughout a string specified by pattern for a string specified by string. Using $_FILES[‘file’][‘type’] − it provides the MIME type of the uploaded file. A PHP session can be destroyed by session_destroy() function. To delete a cookie you should call setcookie() with the name argument only.
The POST method can be used to send ASCII as well as binary data. GET can’t be used to send binary data, like images or word documents, to the server. Echocan output one or more string butprintcan only output one string and always returns 1. Indexed Array – An array with a numeric index is known as the indexed array.
senior PHP developer interview questions and answers
The PHP rand() function is used to generate a random number. This function can generate numbers with-in a given hire php freelancer range. The random number generator should be seeded to prevent a regular pattern of numbers being generated.
This set of PHP Developer interview questions is designed to help you during your hiring process for a PHP Developer position in your company. The function getdate() optionally accepts a time stamp and returns an associative array containing information about the date. If you omit the time stamp, it works with the current time stamp as returned by time().
PHP interview questions and answers
After accessing your callback function, the receiving function can call it at any time. Objects are instances of programmer-defined classes that can box both other value types and functions specific to that class. SQL injections are a method to alter a query in a SQL statement send to the database server.
Yes, we use the urlencode() function to be able to protect special characters. $_FILES is an associative array composed of items sent to the current script via the HTTP POST method. $_SERVER is https://globalcloudteam.com/ an array including information created by the web server such as paths, headers, and script locations. The first code is faster than the second code especially for large large sets of data.
Are Parent constructors called implicitly inside a class constructor?
It’s possible to embed PHP scripts in an HTML page without a problem and transfer information from HTML to PHP. You will be tested on various other grounds such as general aptitude, management, and communication skills. So if you would like to know more about what it takes to break into this career, check out our in-depth guide on how to become a Full Stack Developer. The goto statement can be placed to enable jumping inside the PHP program. The target is pointed by a label followed by a colon, and the instruction is specified as a goto statement followed by the desired target label. The function func_num_args() is used to give the number of parameters passed into a function.
- All PHP code must be included inside one of the three special markup tags ate are recognised by the PHP Parser.
- Therequire_once()statement can be used to include aphpfile in another one, when you may need to include the called file more than once.
- For instance, we can write a .csv file, select a separator between fields , and then proceed to open the file with Excel.
- One of the environemnt variables set by PHP is HTTP_USER_AGENT which identifies the user’s browser and operating system.
- Once the cookie is set, you can access it by $_COOKIE superglobal variable.
An interface cannot contain a state, whereas an abstract class can have a state using instance variables. This is the primary distinction between an abstract class and an interface from the standpoint of object-oriented programming. With the help of the PHP Data Object/Objects extension, the computer language’s databases can be accessed using the most lightweight, consistent interface possible. Any database driver implementing the PHP Data Object’s interface can expose database-specific capabilities like the ordinary extension function. With the PHP Data Object function, any database function can be carried out. List the main types of errors in PHP and explain their differences.
Everything You Need To know About Java Hashcode
PHP is a loosely typed language and we do not require to declare the data types of variables, rather PHP assumes it automatically by analyzing the values. These are critical errors — for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP’s default behavior is to display them to the user when they take place.