How do you pass a variable by value?
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What are the different filter functions used to filter a variable?
What is the difference between print() and echo()?
What is the PHP predefined variable that tells the What types of images that PHP supports?
What is the use of 'print' in php?
How are sessions maintained?
What are advantages of .htaccess?
Whats the difference between include() and require()?
What is difference between mysqli and mysql?
What is the difference between php and javascript?
What is overloading and overriding in php?
Is key exist in array php?
when we use ob_start() function in php then the header() and session_start() does not gives the error like header already sent,please explain in brief