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PHP Filter

PHP Filter
How many types of filtering are present in PHP?

4
3
None
2

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PHP Filter
What will be the output of the following PHP code?
$value = 'car';
$result = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);

TRUE
FALSE
ERROR
NULL

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PHP Filter
Which one of the following filter is used to filter several variables with the same or different filters?

filter_var()
filter_var_array()
filter_input_array
filter_input

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PHP Filter
Which one of the following does not describe a validating filter?

Returns the expected type on success or FALSE on failure
Are used to allow or disallow specified characters in a string
Strict format rules
Are used to validate user input

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PHP Filter
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"));

Peterisagreatguy!
Peter is a great guy!
Error
Peter_is_a_great_guy!

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PHP Filter
Which one of the following filter checks if variable of specified type exists?

filter_has_var
filter_var_array
filter_var
filter_id

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