print_r outputs nothing for "false"

18 years ago by Jakob Buchgraber — view source

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Hello!

While debuging I recognized that print_r does not output anything for
bool(false) (PHP 5.2.1).

e.g.
<?php
print_r (array (true, false, "String"));
?>

Expected result:
Array
(
[0] => 1
[1] => 0
[2] => String
)

Actual result:
Array
(
[0] => 1
[1] =>
[2] => String
)

I was not quite sure whether this is expected behavior, so I haven't
opened a bug yet.

So, is it expected and why?

Cheers,
Jay

18 years ago by Rasmus Lerdorf — view source

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Jakob Buchgraber wrote:

Hello!

While debuging I recognized that print_r does not output anything for
bool(false) (PHP 5.2.1).

e.g.
<?php
print_r (array (true, false, "String"));
?>

Expected result:
Array
(
[0] => 1
[1] => 0
[2] => String
)

Actual result:
Array
(
[0] => 1
[1] =>
[2] => String
)

I was not quite sure whether this is expected behavior, so I haven't
opened a bug yet.

So, is it expected and why?

Because false is not 0. 0 evaluates to false, but so do many other things.

-Rasmus

18 years ago by Robert Deaton — view source

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http://www.php.net/manual/en/language.types.string.php#language.types.string.casting

--
--Robert Deaton

18 years ago by Stefan Walk — view source

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Hi,

for debugging i'd use var_dump, which doesn't output ambiguous things.

Regards,
Stefan