PHP Generate short domain name function _php Tutorial

PHP generates a short domain name function

Short URLs have been popular for some time, the previous Sina Weibo application when there is contact, but did not make it clear, recently again contact this east, carefully studied the next, found that the short URL is actually quite easy. The following will use PHP to generate a short URL implementation method to do a record.

PHP generates a short domain name function

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Public Function Createrandcode ($string) { $code = "; $hex _code = ' 1qaz2wsx3edc4rfv5t-gb6yhn7ujm8ik9ol0p_ '; $now = Microtime (True) * 10000; $strlen = strlen ($hex _code); $hash _code = hash (' sha256 ', $string); This defines a random length for the encoding, depending on the step $step = rand (8, 16); $count = Ceil (strlen ($hash _code)/$step); for ($i = 0; $i < $count; $i + +) { $start = $i * $STEP; $hex _num = substr ($hash _code, $start, $step); $num = 0X3FFFFFFF & (1 * ' 0x '. $hex _num); $n = $num% $strlen; $code. = $hex _code[$n]; } return $code; }

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