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<HTML><HEAD> <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人: thinkin (强强), 信区: Linux <BR>标 题: RandomDigits <BR>发信站: BBS 水木清华站 (Thu Feb 17 11:06:50 2000) <BR> <BR><?php <BR>/* RandomDigit 1.0 -- Copyright 1998 by Michael A. Smith -- <A HREF="mailto:msmith@dn.net">msmith@dn.net</A> <BR>This function returns a random string of a specified number of digits <BR>without leading zeros. For example, if three digits are specified, the <BR>function will return a random three-digit number from 100 to 999. If you <BR>specify an eight-digit string you will not get numbers with fewer than <BR>eight digits, e.g. 376 or 6. */ <BR>function randomdigit($digits) { <BR> static $startseed = 0; <BR> if (!$startseed) { <BR> $startseed = (double)microtime()*getrandmax(); <BR> srand($startseed); <BR> } <BR> $range = 8; <BR> $start = 1; <BR> $i = 1; <BR> while ($i<$digits) { <BR> $range = $range . 9; <BR> $start = $start . 0; <BR> $i++; <BR> } <BR> return (rand()%$range+$start); <BR>} <BR>?> <BR>-- <BR> <BR>人生到处知何似? <BR> 应似飞鸿踏雪泥。 <BR> 泥上偶然留指爪, <BR> 鸿飞那复计东西! <BR> <BR> <BR>※ 来源:·BBS 水木清华站 smth.org·[FROM: 162.105.37.191] <BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>
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