我编写了一个php函数来替换多个字符串
$searchArray = array("0","9","8","7","6","5","4","3","2","1","!","@","#","$","%","^","&","*","(",")","z","x","y","w","u","v","j","i","h","g","f","e","d","c","b","a");
$replaceArray = array("1","2","3","4","5","6","7","8","9","0","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
$string='protect your php code';
echo $code=str_replace($searchArray, $replaceArray, $string);
its result = provxt moor PSP xowv，这似乎是正确的
当我反转它的位置
$string='protvxt moor psp xowv';
$searchArray = array("1","2","3","4","5","6","7","8","9","0","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");
$replaceArray = array("0","9","8","7","6","5","4","3","2","1","!","@","#","$","%","^","&","*","(",")","z","x","y","w","u","v","j","i","h","g","f","e","d","c","b","a");
echo $code=str_replace($searchArray, $replaceArray, $string);
它给我这个答案= eifgecg bffi的cfde(这是错误的)，它应该正确地反转并给出答案保护你的PHP代码
老实说，我不知道为什么php做错了
我把上面的代码粘贴到这里
http://codepad.org/xbSCieZl
请检查这个，我想知道我做错了什么，它让我生气
你的数组应该包含相同的字符。
第一次转换不会改变'pro'和'protect'字符
但是倒序可以
编辑:
对不起，这个答案是错误的，因为我没有意识到以下问题，詹姆斯上面提到:"这一般不会工作。你的测试串很幸运。如果你试图对字符串"123"进行编码，你会得到"123"，因为1被变成了0，然后0又变成了1，以此类推。请参阅str_replace陷阱- James"
你可以使用上面的建议strtr()
$search = "abcdefghijklmnopqrstuvwxyz";
$replace = "zabcdefghijklmnopqrstuvwxy";
$string='protect your php code';
echo $code=strtr($string, $search, $replace);
echo '<br>';
echo strtr($code, $replace, $search);
输出:
保护你的PHP代码
编辑:
此外，您可以生成您的字符串和随机化:
$search = implode("",range("a","z")).implode("",range("0","9"));
$replace = str_shuffle($search);