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gmp_sqrt> <gmp_setbit
[edit] Last updated: Fri, 17 May 2013

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gmp_sign

(PHP 4 >= 4.0.4, PHP 5)

gmp_signSegno di un numero

Descrizione

int gmp_sign ( resource $a )

Restituisce il segno di a : 1 se a è positivo e -1 se è negativo.



add a note add a note User Contributed Notes gmp_sign - [1 notes]
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thomas at zilliox dot me
1 year ago
Hi !

If you don't have the GMP extension, the sign function is really simple to code.
Here an example of implementation :

<?php
function sign( $number ) {
    return (
$number > 0 ) ? 1 : ( ( $number < 0 ) ? -1 : 0 );
}

echo
sign( 500 ); // Return 1
echo sign( -500 ); // Return -1
echo sign( 0 ); // Return 0
?>

Thomas.

 
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