PHP two functions: Generate serial number, string substitution

/** * Serial Number generator Func:snmaker Param: $pre = ' ' */ function Snmaker ($pre = ") { $date = Date (' Ymd '); $rand = rand (1000000,9999999); $time = Mb_substr (Time (), 5, 5, ' utf-8 '); $serialNumber = $pre. $date. $time. $rand; echo strlen ($serialNumber). ' '; return $serialNumber; } Echo Snmaker (); /** * Replace a part of a string with a specific character * @param str or int $str The string to be processed * @param str or int $to will be replaced by what string * @param int $start retain the first few characters * @param int $end retain the last few characters * url:http://bbs.it-home.org * DATE:2013/2/17 */ function hidestring ($str = ' Hello ', $to = ' * ', $start = 1, $end = 0) { $lenth = strlen ($str)-$start-$end; $lenth = ($lenth < 0)? 0: $lenth; $to = Str_repeat ($to, $lenth); $str = Substr_replace ($str, $to, $start, $lenth); return $str; } Echo hidestring (); ?> Copy Code

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