ExamVeda
Login
Home

What will be the output of the following PHP code &lt...

This question belongs to PHP PHP Filter
PHP Filter
?

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

Answer & Solution
Correct Answer: Option C
There is an undocumented filter flag for FILTER_VALIDATE_BOOLEAN. The documentation implies that it will return NULL if the value doesn’t match the allowed true/false values. However this doesn’t happen unless you give it the FILTER_NULL_ON_FAILURE flag.
Examveda
Question posted by Examveda
Community

Join the Discussion

No comments yet Be the first to discuss this question.
Keep Learning

Related Questions on PHP Filter

Which of the following is/are an external data?
1. Cookies
2. Input data from a form
3. Server Variables
4. Web services data
A. Only 2 B. 2 and 3 C. None of the mentioned D. All of the mentioned
How many types of filtering are present in PHP?
A. 3 B. 2 C. 4 D. None
Which one of the following filter is used to filter several variables with the same or different filters?
A. filter_var_array() B. filter_var() C. filter_input D. filter_input_array
What will be the output of the following PHP code? 
<?php
$num = "123";
if (!filter_var($num, FILTER_VALIDATE_INT))
    echo("Integer is not valid");
else
    echo("Integer is valid");
?>
A. No output is returned B. Integer is not valid C. Integer is valid D. Error
More Related Questions on PHP Filter