php7 bcmul函数没有

bcmul没有，是php70w-bcmul这个没有装。 yum install php70w-bcmath 就ok了。顺便来个uuid的生成函数吧。



function uuid()
{
list($usec, $sec) = explode(" ", microtime(false));
$usec = (string)($usec * 10000000);
$timestamp = bcadd(bcadd(bcmul($sec, "10000000"), (string)$usec), "621355968000000000");
$ticks = bcdiv($timestamp, 10000);
$maxUint = 4294967295;
$high = bcdiv($ticks, $maxUint) + 0;
$low = bcmod($ticks, $maxUint) - $high;
$highBit = (pack("N*", $high));
$lowBit = (pack("N*", $low));
$guid = str_pad(dechex(ord($highBit[2])), 2, "0", STR_PAD_LEFT) . str_pad(dechex(ord($highBit[3])), 2, "0", STR_PAD_LEFT) . str_pad(dechex(ord($lowBit[0])), 2, "0", STR_PAD_LEFT) . str_pad(dechex(ord($lowBit[1])), 2, "0", STR_PAD_LEFT) . "-" . str_pad(dechex(ord($lowBit[2])), 2, "0", STR_PAD_LEFT) . str_pad(dechex(ord($lowBit[3])), 2, "0", STR_PAD_LEFT) . "-";
$chars = "abcdef0123456789";
for ($i = 0; $i < 4; $i++) {
$guid .= $chars[mt_rand(0, 15)];
}
$guid .= "-";
for ($i = 0; $i < 4; $i++) {
$guid .= $chars[mt_rand(0, 15)];
}
$guid .= "-";
for ($i = 0; $i < 12; $i++) {
$guid .= $chars[mt_rand(0, 15)];
}

return $guid;
}

php7 bcmul函数没有

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