使用token的方式，可以控制用户在这个时间内的权限，代码如下：
function genToken( $len = 32, $md5 = true ) { # Seed random number generator # Only needed for PHP versions prior to 4.2 mt_srand( (double)microtime()*1000000 ); # Array of characters, adjust as desired $chars = array( "Q", "@", "8", "y", "%", "^", "5", "Z", "(", "G", "_", "O", "`", "S", "-", "N", "<", "D", "{", "}", "[", "]", "h", ";", "W", ".", "/", "|", ":", "1", "E", "L", "4", "&", "6", "7", "#", "9", "a", "A", "b", "B", "~", "C", "d", ">", "e", "2", "f", "P", "g", ")", "?", "H", "i", "X", "U", "J", "k", "r", "l", "3", "t", "M", "n", "=", "o", "+", "p", "F", "q", "!", "K", "R", "s", "c", "m", "T", "v", "j", "u", "V", "w", ",", "x", "I", "$", "Y", "z", "*" ); # Array indice friendly number of chars; $numChars = count($chars) - 1; $token = ""; # Create random token at the specified length for ( $i=0; $i<$len; $i++ ) $token .= $chars[ mt_rand(0, $numChars) ]; # Should token be run through md5? if ( $md5 ) { # Number of 32 char chunks $chunks = ceil( strlen($token) / 32 ); $md5token = ""; # Run each chunk through md5 for ( $i=1; $i<=$chunks; $i++ ) $md5token .= md5( substr($token, $i * 32 - 32, 32) ); # Trim the token $token = substr($md5token, 0, $len); } return $token; }
然后可以使用echo genToken()查看生成的32位随机数;
