What are the 4 built in functions in PHP?

PHP comes with a wide range of built-in functions that cover various tasks and operations. It's challenging to narrow them down to just four, but here are four commonly used built-in functions that provide essential functionality in PHP:

echo() and print()

echo() and print() are used to output text and variables to the browser.

echo() is more commonly used and can output multiple values separated by commas.

print() is similar to echo() but only takes one argument and returns 1 (true) after printing.

count()

count() is used to count the number of elements in an array or the properties in an object.

It returns the number of elements or properties.

strlen()

strlen() calculates the length (number of characters) of a string.

It returns the number of characters in the string.

date()

date() is used to format and display the current date and time.

It takes a format string as an argument and returns the formatted date and time.

These functions provide basic yet essential functionality for various tasks, such as outputting content, counting elements, calculating string lengths, and formatting dates. However, keep in mind that PHP has a vast number of built-in functions to handle a wide variety of tasks, ranging from data manipulation and arrays to file handling, database interaction, and more.

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