添加Hash字符串的方法

src/Library/Hash.php

@@ -0,0 +1,145 @@
+<?php
+/**
+ * 字符串Hash方法
+ *
+ */
+namespace Qii\Library;
+
+class Hash
+{
+    const HASH_MODE = 701819;
+    public function DJBHash($str) // 0.22
+    {
+        $hash = 0;
+        $n = strlen($str);
+        for ($i = 0; $i < $n; $i++) {
+            $hash += ($hash << 5) + ord($str[$i]);
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function ELFHash($str) // 0.35
+    {
+        $hash = $x = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash = ($hash << 4) + ord($str[$i]);
+            if (($x = $hash & 0xf0000000) != 0) {
+                $hash ^= ($x >> 24);
+                $hash &= ~$x;
+            }
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function JSHash($str) // 0.23
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash ^= (($hash << 5) + ord($str[$i]) + ($hash >> 2));
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function SDBMHash($str) // 0.23
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash = ord($str[$i]) + ($hash << 6) + ($hash << 16) - $hash;
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function APHash($str) // 0.30
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            if (($i & 1) == 0) {
+                $hash ^= (($hash << 7) ^ ord($str[$i]) ^ ($hash >> 3));
+            } else {
+                $hash ^= (~(($hash << 11) ^ ord($str[$i]) ^ ($hash >> 5)));
+            }
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function DEKHash($str) // 0.23
+    {
+        $n = strlen($str);
+        $hash = $n;
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash = (($hash << 5) ^ ($hash >> 27)) ^ ord($str[$i]);
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function FNVHash($str) // 0.31
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash *= 0x811C9DC5;
+            $hash ^= ord($str[$i]);
+        }
+        
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function PJWHash($str) // 0.33
+    {
+        $hash = $test = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash = ($hash << 4) + ord($str[$i]);
+            
+            if (($test = $hash & -268435456) != 0) {
+                $hash = (($hash ^ ($test >> 24)) & (~-268435456));
+            }
+        }
+        
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function PHPHash($str) // 0.34
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash = ($hash << 4) + ord($str[$i]);
+            if (($g = ($hash & 0xF0000000))) {
+                $hash = $hash ^ ($g >> 24);
+                $hash = $hash ^ $g;
+            }
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function OpenSSLHash($str) // 0.22
+    {
+        $hash = 0;
+        $n = strlen($str);
+        
+        for ($i = 0; $i < $n; $i++) {
+            $hash ^= (ord($str[$i]) << ($i & 0x0f));
+        }
+        return $hash % self::HASH_MODE;
+    }
+    
+    public function MD5Hash($str) // 0.050
+    {
+        $hash = md5($str);
+        $hash = $hash[0] | ($hash[1] << 8) | ($hash[2] << 16) | ($hash[3] << 24) | ($hash[4] << 32) | ($hash[5] << 40) | ($hash[6] << 48) | ($hash[7] << 56);
+        return $hash % self::HASH_MODE;
+    }
+}