note 97102 added to function.bindec
| From: | info at rickdg dot nl | Date: | Thu, 01 Apr 2010 12:40:51 +0000 |
| Subject: | note 97102 added to function.bindec | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-167615@lists.php.net to get a copy of this message | ||
Two functions to convert 16bit or 8bit binary to integer using two's complement. If input
exceeds maximum bits, false is returned. Function is easily scalable to x bits by changing the
hexadecimals.
<?php function _bin16dec($bin) {
// Function to convert 16bit binary numbers to integers using two's complement
$num = bindec($bin);
if($num > 0xFFFF) { return false; }
if($num >= 0x8000) {
return -(($num ^ 0xFFFF)+1);
} else {
return $num;
}
}
function _bin8dec($bin) {
// Function to convert 8bit binary numbers to integers using two's complement
$num = bindec($bin);
if($num > 0xFF) { return false; }
if($num >= 0x80) {
return -(($num ^ 0xFF)+1);
} else {
return $num;
}
} ?>
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Server IP: 69.147.83.197
Probable Submitter: 131.155.174.177
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Manual Page -- http://www.php.net/manual/en/function.bindec.php
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