Php Interview Questions For 1 Year Experience
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As a PHP developer with 1 year of experience, you may be asked a variety of questions during an interview. Some common topics may include your understanding of the PHP programming language, experience with PHP frameworks such as Laravel or Symfony, knowledge of MySQL or other databases, and experience with web development and design. You may also be asked about your problem-solving skills, ability to work with a team, and experience with version control systems like Git. Additionally, questions may be asked about your familiarity with frontend languages like HTML, CSS, and JavaScript, as well as your understanding of concepts like object-oriented programming and database normalization. It is important to showcase your knowledge, experience, and critical thinking skills during the interview to demonstrate your suitability for the role.
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1 - What is the difference between GET and POST method in PHP?
GET method sends data through the URL, whereas POST method sends data through the request body. GET method should be used for requesting data, while POST method should be used for sending data to the server.
2) What is the difference between include and require statement in PHP?
Include statement includes and evaluates a file, whereas require statement includes and evaluates a file, but if the file is not found, it will cause a fatal error and stop the script execution.
3) What is the difference between isset and empty function in PHP?
Isset function checks if a variable is set and not null, while empty function checks if a variable is considered to be empty (i.e. 0, “”, null, false, array with no elements).
4) How to prevent SQL injection in PHP?
SQL injection can be prevented by using prepared statements with parameterized queries, escaping user input, and validating user input. It is also important to not trust user input and properly sanitize any data before using it in database queries.
5) What is the use of session in PHP?
Session in PHP helps to store user information on the server for later use. It is useful for creating a more personalized user experience, storing user login information, and to preserve data across multiple pages.
6) What are the different types of arrays in PHP?
In PHP, there are three types of arrays: indexed arrays, associative arrays, and multidimensional arrays. Indexed arrays use numerical indexes, associative arrays use a key value pair, and multidimensional arrays contain other arrays within them.
7) How to connect to a database from PHP?
To connect to a database from PHP, you can use the mysqli or PDO extension. First, create a new connection object using the appropriate credentials and then use it to establish a connection with the database.
8) What is the use of “echo” in PHP?
Echo is used to output data on the web page. It can be used to display HTML, variables, or the result of expressions.
9) What is the purpose of the “var” keyword in PHP?
The var keyword is used to declare a variable and is usually used for global variables in PHP.
10) What is the use of “htmlspecialchars” function in PHP?
The htmlspecialchars function is used to convert special characters to their corresponding HTML entities. This is useful for preventing cross site scripting (XSS) attacks.
11) How to redirect a page in PHP?
To redirect a page in PHP, you can use the header() function with the location parameter, specifying the URL of the page you want to redirect to.
12) How to check if a variable is an array in PHP?
You can use the is_array() function to check if a variable is an array in PHP. It will return true if the variable is an array, otherwise it will return false.
13) What is the use of “array_merge” function in PHP?
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The array_merge() function is used to merge two or more arrays into a single array. It does not change the original arrays, but creates a new one with the merged values.
14) How to handle errors in PHP?
Errors in PHP can be handled by using the try…catch block or by setting a custom error handler using the set_error_handler() function.
15) What is the use of “strlen” function in PHP?
The strlen() function is used to return the length of a string. It can be useful for validating input or for manipulating strings in your code.
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