note 114186 added to function.decbin
| From: | (.a.t.) | Date: | Wed, 22 Jan 2014 09:07:01 +0000 |
| Subject: | note 114186 added to function.decbin | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-198299@lists.php.net to get a copy of this message | ||
hi folks, i struggled for a day to get a big decimal number converted into binary, on the windows
platform.
finally with bcmath functions this is what worked for me.
function bc_convert2bin($string) {
//got it to work with bcmath functions, works for 64 bit on 32 bit windows machine
$finished=0;
$base=2;
$bin_nr='';
if(preg_match("/[^0-9]/", $string)) {
for($i=0; $string!=chr($i); $i++) {
$dec_nr=$i;
}
} else {
$dec_nr=$string;
}
//while( $dec_nr>$base ) {
while( bccomp($dec_nr,$base) == 1 ) {
//$base=$base*2;
$base=bcmul($base,'2');
//if($base>$dec_nr) {
if( bccomp($base,$dec_nr) == 1 ) {
//$base=$base/2;
$base=bcdiv($base,'2');
break;
}
}
while(!$finished) {
//if(($dec_nr-$base)>0) {
if( bccomp( bcsub($dec_nr,$base) , 0) == 1 ) {
//$dec_nr=$dec_nr-$base;
$dec_nr=bcsub($dec_nr,$base);
$bin_nr.=1;
//$base=$base/2;
$base=bcdiv($base,'2');
//} elseif(($dec_nr-$base)<0) {
} elseif( bccomp( bcsub($dec_nr,$base) , 0) == -1 ) {
$bin_nr.=0;
//$base=$base/2;
$base=bcdiv($base,'2');
//} elseif(($dec_nr-$base)==0) {
} elseif( bccomp( bcsub($dec_nr,$base) , 0) == 0 ) {
$bin_nr.=1;
$finished=1;
//while($base>1) {
while( bccomp($base,1) == 1 ) {
$bin_nr.=0;
//$base=$base/2;
$base=bcdiv($base,'2');
}
}
}
return $bin_nr;
}
----
Server IP: 72.52.91.14
Probable Submitter: 72.52.91.14
----
Manual Page -- http://php.net/manual/en/function.decbin.php
Edit -- https://master.php.net/note/edit/114186
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