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Question: What is the purpose of the 'array_map()' function in PHP?
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Answer: The 'array_map()' function in PHP applies a callback function to each element of an array
and returns a new array with the modified elements.
It allows one to perform a specific operation on each element of an array without using a loop.
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Question: Can you explain the concept of inheritance in PHP?
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Answer: In PHP inheritance allows a class (subclass) to inherit properties and methods from
another class (superclass).
It promotes code reusability and allows for the creation of hierarchical relationships between classes.
Subclasses can override methods and properties of the superclass and add new methods and properties.
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Question: What is the purpose of the 'count()' function in PHP?
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Answer: The 'count()' function in PHP is used to count the number of elements in an array or the number
of properties in an object.
It returns the count as an integer value.
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Question: What is a 'ternary operator' in PHP, and how is it used?
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Answer: The 'ternary operator (?:)' in PHP is a shorthand way of writing an if-else statement.
It evaluates a condition and returns one of two values depending on whether the condition is true or false.
Its syntax is: condition ? value_if_true : value_if_false.
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Question: Can you explain the purpose of the 'file_get_contents()' function in PHP?
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Answer: The 'file_get_contents()' function in PHP is used to read the contents of a file into a string.
It takes the filename as its parameter and returns the file's contents as a string.
This function is commonly used for reading data from files, such as text files or JSON files.
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Question: What is the purpose of the session_start() function in PHP?
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Answer: The 'session_start()' function in PHP is used to start a new or resume an existing session.
It initializes session data and generates a unique session ID for the user.
This function must be called before accessing or setting any session variables.
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Question: Can you explain the difference between type hinting and type casting in PHP?
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Answer: The type hinting in PHP is a way to specify the expected data type of a function parameter or
return value, ensuring type safety.
And type casting, is the explicit conversion of a variable from one data type to another using
casting operators such as (int), (string), (float), etc.
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Question: What is the purpose of the 'array_merge()' function in PHP?
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Answer: The 'array_merge()' function in PHP is used to merge two or more arrays into a single array.
It takes multiple arrays as arguments and returns a new array containing all the elements of the input arrays.
If two or more input arrays have the same string keys, the later value will overwrite the previous one.
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Question: Can you explain the use of the in_array() function in PHP?
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Answer: The 'in_array()' function in PHP is used to check if a value exists in an array.
It takes two parameters: the value to search for and the array to search in.
If the value is found in the array, the function returns true; otherwise, it returns false.
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