How to get binary representation of floating-point number in PHP?

Question

Is there any way to get the binary representation of a floating point number in PHP? Something like Java\'s Double.doubleToRawLongBits().

Given a positive floating p

Answer 1

java:

long lnBits = Double.doubleToLongBits(longValue);
Byte[] bits = new byte [] {
   (byte) ((value << 56) >>> 56),
   (byte) ((value << 48) >>> 56),
   (byte) ((value << 40) >>> 56),
   (byte) ((value << 32) >>> 56),
   (byte) ((value << 24) >>> 56),
   (byte) ((value << 16) >>> 56),
   (byte) ((value << 8) >>> 56),
   (byte) (value >>> 56)}

php:

$bits = $bitsFromJava;
$str="";
for($i=0;$i<8;i++){
    $str.=chr($bits[$i]);
}
$longValue=unpack('d',$str);

$bitsToJava=array();
for(str_split(pack($longValue)) as $chr){
    $bitsToJava[]=ord($chr);
}