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php自定义hash函数实例_php技巧

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Release: 2016-05-16 20:16:11
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本文实例讲述了php自定义hash函数实现方法。分享给大家供大家参考。具体分析如下:

这里演示php实现的一个简单hash算法,可以用来加密,不过这个函数过于简单,不能用来解密

function SimpleHash($str){  
  $n = 0;
  // The magic happens here:
  // I just loop trough all letters and add the
  // ASCII value to a integer variable. 
  for ($c=0; $c < strlen($str); $c++)
    $n += ord($str[$c]);
  // After we went trough all letters
  // we have a number that represents the
  // content of the string
  return $n;
}
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调用方法:

$TestString = 'www.jb51.net';
print SimpleHash($TestString); 
// returns: 1082
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希望本文所述对大家的php程序设计有所帮助。

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