PHP Digest Generation function (custom, no garbled)

/** PHP Digest Generation function Link:http://bbs.it-home.org 2013-3-7 */ function Cutstr ($string, $length, $charset, $dot) {//characters, intercept length, character set, end symbol if (strlen ($string) <= $length) { return $string; } $pre = Chr (1); $end = Chr (1); Protect Special strings $string = str_replace (Array (' & ', ' ' ', ' < ', ' > '), Array ($pre. ') & '. $end, $pre. ' ". $end, $pre. ' < '. $end, $pre. ' > '. $end), $string); $strcut = "; if (Strtolower ($charset) = = ' Utf-8 ') { $n = $tn = $noc = 0; while ($n < strlen ($string)) { $t = Ord ($string [$n]); if ($t = = 9 | | $t = = 10 | | (<= $t && $t <= 126)) { $tn = 1; $n + +; $noc + +; } elseif (194 <= $t && $t <= 223) { $tn = 2; $n + = 2; $noc + = 2; } elseif (224 <= $t && $t <= 239) { $tn = 3; $n + = 3; $noc + = 2; } elseif (<= $t && $t <= 247) { $tn = 4; $n + = 4; $noc + = 2; } elseif (248 <= $t && $t <= 251) { $tn = 5; $n + = 5; $noc + = 2; } elseif ($t = = 252 | | $t = = 253) { $tn = 6; $n + = 6; $noc + = 2; } else { $n + +; } if ($noc >= $length) { Break } } if ($noc > $length) { $n-= $tn; } $strcut = substr ($string, 0, $n); } else { for ($i = 0; $i < $length; $i + +) { $strcut. = Ord ($string [$i]) > 127? $string [$i]. $string [+ + $i]: $string [$i]; } } To restore a special string $strcut = Str_replace (Array ($pre. ' & '. $end, $pre. ' ". $end, $pre. ' < '. $end, $pre. ' > '. $end), Array (' & ', ' "', ' < ', ' > '), $strcut); Fixed an issue where special string segments occurred $pos = Strrpos ($s, Chr (1)); if ($pos!== false) { $strcut = substr ($s, 0, $pos); } return $strcut. $dot; } ?> Copy Code The above is the full code of the PHP digest generation function, you copy to your own editor, and then test run it.

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