Get sign of non-integer using gmp_sign()

[NotionCommotion]

Why am I getting this error?  I see no mention that the argument must be an integer in http://php.net/manual/en/function.gmp-sign.php.  I am using PHP7.  Thanks

<?php
ini_set('display_errors', 1);
echo gmp_sign('1');
echo gmp_sign('1.1');

1<br />
<b>Warning</b>:  gmp_sign(): Unable to convert variable to GMP - string is not an integer in <b>/var/www/public/noname2.php</b> on line <b>6</b><br />

 

[ginerjm]

Your arguments are not integers.  As the message says.  Although this doesn't look like it is on line 6.

 

I'll let you figure out why your arguments are not integers.

[Barand]

Despite the manual specifying "number" it would appear that the parameter must be either an integer or a string representation of an integer. No floats.

[NotionCommotion]

Yeah Barand,  I suspected that, but didn't want to come out and say there was an error in the manual. http://php.net/manual/en/language.types.php describes both numbers and integers, and http://php.net/manual/en/function.gmp-sign.php means integers but says numbers.  Albeit small, I will report it.