PHP Interview Questions For Freshers

How do you redirect a user to a different page in PHP?

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What is the use of 'json_encode' and 'json_decode' functions in PHP?

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How do you handle file uploads in PHP?

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Explain the difference between echo and print in PHP.

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What is the purpose of the 'mysqli' extension in PHP?

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How do you connect to a MySQL database using PHP?

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What is the 'include' function in PHP used for?

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Explain the 'foreach' loop in PHP.

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What is the use of 'explode' function in PHP?

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What is a session in PHP?

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What is the difference between GET and POST method in PHP?

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How do you generate random numbers in PHP?

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What is the purpose of the 'die' function in PHP?

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How can you display PHP errors?

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What are the different types of errors in PHP?

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How do you declare a variable in PHP?

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What are the basic data types supported by PHP?

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What is PHP?

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How do you validate user input in PHP?

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What is the difference between htmlentities and htmlspecialchars in PHP?

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Explain the concept of object-oriented programming in PHP.

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What are namespaces in PHP?

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What is the use of 'try' and 'catch' block in PHP?

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Explain the concept of inheritance in PHP.

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What is the purpose of the 'final' keyword in PHP?

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How do you encrypt data in PHP?

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What is the difference between single quotes and double quotes in PHP?

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Explain the ternary operator in PHP.

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What is the use of the 'static' keyword in PHP?

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How do you handle exceptions in PHP?

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What is the purpose of the 'spl_autoload_register' function in PHP?

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How do you handle cookies in PHP?

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What is the use of the 'header' function in PHP?

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PHP Intermediate Interview Questions

Explain the concept of method chaining in PHP.

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What is the use of the 'array_unique' function in PHP?

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How do you handle file caching in PHP?

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What is the purpose of the 'array_slice' function in PHP?

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Explain the concept of database normalization in PHP.

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How do you create a RESTful API in PHP?

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What is the use of the 'array_reduce' function in PHP?

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Explain the concept of recursion in PHP.

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What is the use of the 'array_merge' function in PHP?

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How do you handle multiple language support in PHP?

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What is the purpose of the 'gc_collect_cycles' function in PHP?

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How do you retrieve data from a MySQL database using PHP?

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What is the use of the 'array_filter' function in PHP?

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Explain the concept of dependency injection in PHP.

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How do you handle file uploads with progress bar in PHP?

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What is the use of the 'array_map' function in PHP?

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Explain the 'preg_match' function in PHP.

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What are the different types of sorting algorithms in PHP?

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How do you implement a caching system in PHP?

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What is the purpose of the '__construct' function in PHP classes?

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Explain the concept of type hinting in PHP.

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How do you create and use a session variable in PHP?

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What is the use of the 'file_get_contents' function in PHP?

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Explain the concept of anonymous functions in PHP.

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What is the difference between require and include in PHP?

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How do you use sessions to store data in PHP?

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Explain the 'switch' statement in PHP.

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What is the use of the 'filter_var' function in PHP?

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How can you prevent SQL injection attacks in PHP?

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How do you handle file downloads in PHP?

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Explain the concept of traits in PHP.

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How do you implement a pagination system in PHP?

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PHP Interview Questions For Experienced

Explain the concept of cookie-based authentication in PHP.

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What is the purpose of the 'array_multisort' function in PHP?

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Explain the concept of RESTful web services in PHP.

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What is the use of the 'array_change_key_case' function in PHP?

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How do you optimize SQL queries in PHP?

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What is the purpose of the 'array_reverse' function in PHP?

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Explain the concept of code obfuscation in PHP.

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How do you implement a binary tree data structure in PHP?

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What is the difference between mysqli and PDO in PHP?

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Explain the concept of asset management in PHP web development.

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What is the use of the 'array_walk_recursive' function in PHP?

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How do you handle file compression in PHP?

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Explain the concept of introspection in PHP.

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How do you implement a binary search algorithm in PHP?

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What is the use of the 'array_intersect' function in PHP?

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Explain the 'list' function in PHP.

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How do you implement a queue data structure in PHP?

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What is the purpose of the 'array_diff' function in PHP?

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Explain the concept of abstract classes and interfaces in PHP.

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How do you handle multiple database connections in PHP?

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What is the difference between SOAP and REST in PHP?

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