Description:
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From manual page: http://www.php.net/function.pow%23Changelog
---
The manual says that pow() returns FALSE on error. Furthermore, it states that 
"PHP stops to emit a warning if the value can't be computed, it will now 
silently return FALSE only." since PHP 4.2.0.

I checked the source code of PHP 4.2.0, PHP 5.2 and PHP 5.3 and I simply cannot 
find a case where FALSE is returned. I even tried values like INF, NAN, -INF, 0, 
1.5, -1.5, array(), new stdClass(), TRUE, FALSE, NULL for the arguments $base 
and $exp, but FALSE is never returned.

The result can be an integer, a float, or a pseudo-float like INF, NAN or -INF, 
but just never FALSE.

a) Is the documentation still right when stating that pow() can return FALSE?

EDIT: I just checked the the source code of PHP 4.0.7 and there, FALSE can be 
returned.

Conclusion: Since PHP 4.2.0, no warning is emitted anymore, but neither can a 
FALSE be returned. It simply will return NAN on error.

Expected result:
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Remove the line "If the power cannot be computed FALSE will be returned instead." 
and instead add "Be aware that non-finite values can be returned like INF, -INF or 
NAN in case of an error like overflow or underflow."

"Since 4.2.0	- PHP stops to emit a warning if the value can't be computed, it will 
now silently return FALSE only." should be changed to "Since 4.2.0 - PHP stops to 
emit a warning and return FALSE if the value can't be computer, it will return 
INF, -INF or NAN in case of an error."