How to convert a string to uppercase in php?

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Explain type casting and type juggling.

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What is final class and final method in php?

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Is md5() is breakable if yes than how?

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What are global variables in php?

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What is the role of php.ini file?

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What do you mean by design patterns (php) ?

1 Answers   NIIT,

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What does accessing a class via :: means?

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class Database { public static $_instance; public static function getInstance() { if(!isset(self::$_instance)) self::$_instance = new Database(DB_SERVER, DB_USER, DB_PASS, DB_NAME); print_r(self::$_instance); return self::$_instance; } } can any one explain "self::$_instance = new Database(DB_SERVER, DB_USER, DB_PASS, DB_NAME);" this line

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Without using forms and hidden variables, how to send variables from a PHP script to another URL using POST method?

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what is benefit of magento?

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Explain what is the function file_get_contents() usefull for?

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