What is difference between echo and print_r in php?

703

How many keywords are there in php?

880

How to repeat a string to a specific number of times in php?

747

What version of php do I have windows?

702

What type of comments are supported by PHP.

775

How many escape sequences are recognized in double-quoted strings in php?

752

Explain some of the php string functions?

760

What is whitespace in php?

774

What is string function sql?

723

What is the use of print_r function in php?

729

What are the encryption functions available in PHP?

833

How to track no of user logged in?

832

In how many ways we can retrieve the data in the result set of mysql using php?

711

What are the different tables(engine) present in mysql, which one is default?

746

What is php static function?

747