note 83716 added to language.types.float
| From: | an dot kovacs at gmail dot com | Date: | Mon, 09 Jun 2008 04:59:15 +0000 |
| Subject: | note 83716 added to language.types.float | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-140256@lists.php.net to get a copy of this message | ||
Converting IEEE754 binary representation to php float:
function bin2float ($bin) {
if((ord($bin[0])>>7)==0) $sign=1;
else $sign=-1;
if((ord($bin[0])>>6)%2==1) $exponent=1;
else $exponent=-127;
$exponent+=(ord($bin[0])%64)*2;
$exponent+=ord($bin[1])>>7;
$base=1.0;
for($k=1;$k<8;$k++) {
$base+=((ord($bin[1])>>(7-$k))%2)*pow(0.5,$k);
}
for($k=0;$k<8;$k++) {
$base+=((ord($bin[2])>>(7-$k))%2)*pow(0.5,$k+8);
}
for($k=0;$k<8;$k++) {
$base+=((ord($bin[3])>>(7-$k))%2)*pow(0.5,$k+16);
}
$float=(float)$sign*pow(2,$exponent)*$base;
return $float;
}
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Server IP: 62.237.7.3
Probable Submitter: 91.152.109.127
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Manual Page -- http://www.php.net/manual/en/language.types.float.php
Edit -- https://master.php.net/note/edit/83716
Del: integrated -- https://master.php.net/note/delete/83716/integrated
Del: useless -- https://master.php.net/note/delete/83716/useless
Del: bad code -- https://master.php.net/note/delete/83716/bad+code
Del: spam -- https://master.php.net/note/delete/83716/spam
Del: non-english -- https://master.php.net/note/delete/83716/non-english
Del: in docs -- https://master.php.net/note/delete/83716/in+docs
Del: other reasons-- https://master.php.net/note/delete/83716
Reject -- https://master.php.net/note/reject/83716
Search -- https://master.php.net/manage/user-notes.php