If we would like to pass values through a form or an URL, then we need to encode and to decode them using htmlspecialchars() and urlencode(). Database manipulation operations, such as addition, deletion, and modification, can be done easily. If the client browser does not support cookies, the unique php session id is displayed in the URL; Sessions have the capacity to store relatively large data compared to cookies. It means that this protocol does not maintain state between two 32) Which function gives us the number of affected entries by a query? A persistent cookie is permanently stored in a cookie file on the browser's computer. PHP Create/Retrieve a Cookie. To be able to display a human-readable result we use print_r(). Alongside containing some of the PHP libraries, it also provides you with a simple interface to automatically install packages. Submitting a form by selecting an option from the drop-down box with the invocation of an onChange event, The default time allowed for a PHP script to execute is 30 seconds mentioned in the. For example, it is possible to write a .csv file, to choose for example comma as a separator between fields and then to open the file with Excel. Queries that create the database are input and later stored into a string variable. How can we display the output directly to the browser? 44) What does the function get_magic_quotes_gpc() means? So you should be thorough and should provide a detailed answers for basic questions. PHP Interview Question #5 On the OnClick event of a label in the form, a JavaScript function can be called to submit the form. 30 seconds . PHP sessions are stored on the server generally in text files in a … However, it can also resume an existing session if it is stopped. The function func_num_args() is used to give the number of parameters passed into a function. If it evaluates to FALSE, the execution of the loop ends. The unset() function is dedicated for variable management. What are the types of variables present in PHP? 53) Will a comparison of an integer 12 and a string "13" work in PHP? A session ends when the user closes the browser or after leaving the site, the server will terminate the session after a predetermined period of time, commonly 30 minutes duration. You can propagate a session id via cookies or URL parameters. Let's consider following examples to understand the concept of Session and cookies Example 1: Lets create a page test.php. It extends PHP and provides a higher level of programming for web developers. Discuss each question in detail for better understanding and in-depth knowledge of PHP PHP consists of many constants, and following are some of the widely used ones: PHP escape is a mechanism that is used to tell the PHP parser that certain code elements are different from PHP code. The extension .php is needed alongside the filename. PHP is one of the world’s most renowned scripting languages which is used for web development. Variables and … PHP - 101 PHP interview questions and 523 answers by expert members with experience in PHP subject. The strip_tags() function enables us to clean a string from the HTML tags. Next up on these PHP interview questions, you need to understand a fundamental concept. stristr() is identical to strstr() except that it is case insensitive. The session variable can store more data than the cookie variable. Q5. It is not holding the multiple variable in cookies. The Top PHP Interview Questions blog is segmented into three divisions: operator. The time limit can be set to zero to impose no time limit. The second is ('.='), which appends the argument on the right to the argument on the left. '), which returns the concatenation of its right and left arguments. Q7. FPDF is a PHP class, which allows generating PDF files with pure PHP (without using PDFlib). PHP uses DES for encryption. expr3 is tested at the end of each iteration. quite helpful. PHP sessions actually use cookies, but they add more functionality and security. Basic. Sessions automatically end when the PHP script finishes executing but can be manually ended using the session_write_close(). Following are some of them: The ‘final’ keyword, if present in a declaration, denotes that the current method does not support overriding by other classes. 97) Is it possible to extend the execution time of a PHP script? The function eregi_replace() is identical to the function ereg_replace() except that it ignores case distinction when matching alphabetic characters. There are three main types of arrays that are used in PHP. 54) How is it possible to cast types in PHP? :: is used to access static methods that do not require object initialization. Unless, if you have partitioned your data, then it becomes necessary to know from which instance to get the data from or to put into. The value of a variable depends on its latest assigned value. The format is as follows: A form can be posted or submitted without the button in the following ways: The default limit is 30 seconds. This is used when there is a requirement to create an immutable class. Private – Visible only in its own class Public – Visible to any other code accessing the class Protected – Visible only to classes parent(s) and classes that extend the current class. The constant() function is used to retrieve the values predefined in a constant variable. We have to keep in mind that if our PHP script is written for the Web CGI interface, it may not execute properly in the command-line environment. 80) What are the two main string operators? The metaphone() function calculates the metaphone key of a string. Following are some of the most widely used concepts that PHP offers: The answer to this is both yes and no. 95) What is the difference between characters \034 and \x34? The session cookie is stored in temporary memory and is not retained after the browser is closed. 73) What is the difference between $_FILES['userfile']['name'] and $_FILES['userfile']['tmp_name']? The target is pointed by a label followed by a colon, and the instruction is specified as a goto statement followed by the desired target label. This creates a lot of competition when it comes to applying for jobs. Sessions are passed in browser cookies, which are little extra bits of information that get sent to and from a web browser. The session variable can store more data than the cookie variable. .Net interview questions and answers, Top 10 .Net interview questions and answers, 0-6 years experienced .Net , Linq, MVC,WEB API, ADO.Net The default limit is 30 seconds. Server script sends a set of cookies to the browser. Next up on this core PHP interview questions and answers blog, let us take a look at the intermediate questions. Q10. Typically, these templates will include variables—like {$variable}—and a range of logical and loop operators to allow adaptability within the templates. These .htaccess files are used to change the functionality and features of the Apache web server. The ArrayIndexOutOfBoundException is an example of a runtime exception. 41) How do I escape data before storing it in the database? To be able to verify whether a PHP variable is an instantiated object of a certain class we use instanceof. This is a tutorial series on PHP Interview Questions and Answers. PHP session: when any user made any changes in a web application like the sign in or out, the server does not know who that person on the system is. First, a connection is established to the MySQL server using the PHP script. 79) what the difference between the 'BITWISE AND' operator and the 'LOGICAL AND' operator? 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