PHP Trainee Interview Questions and Answers

A constant is a value that cannot be changed during the execution of a script.

• Constants are defined using the define() function in PHP

• Constants are case-sensitive by default

• Constants can be accessed globally

• Constants are useful for storing values that should not be changed

implode is used to join array elements into a string, while explode is used to split a string into an array.

• implode joins array elements into a string using a specified delimiter.

• explode splits a string into an array using a specified delimiter.

• Example of implode: $array = ['Hello', 'World']; $string = implode(' ', $array); // Output: 'Hello World'

• Example of explode: $string = 'Hello World'; $array = explode(' ', $string); // Output: ['Hello', 'World']

Include is used to add a file in PHP code, while exclude is used to remove a file from PHP code.

• Include is used to include and evaluate a specific file in PHP code

• Exclude is not a standard PHP function, but can be achieved by not including a specific file in the code

• Include is commonly used for importing libraries or reusable code snippets

• Exclude is not a common term in PHP programming

PHP stands for Hypertext Preprocessor, a server-side scripting language used for web development.

• PHP is a widely-used open source scripting language

• It is especially suited for web development and can be embedded into HTML

• PHP code is executed on the server, generating HTML which is then sent to the client's browser