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Question
What will be the output of the following PHP code?function convertSpace($string){return str_replace("_", " ", $string);}$string = "Peter_is_a_great_guy!";echo filter_var($string, FILTER_CALLBACK, array("options"=>"convertSpace"));
Options:
A .  Peter_is_a_great_guy!
B .  Error
C .  Peter is a great guy!
D .  Peterisagreatguy!
Answer: Option C

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