Ask about the decryption concept of php obfuscation character + eval. I hope that xuzuning and other experts will help me solve the problem of two php file encryption recently, which seems to be confusing and eval.
This obfuscation is different from
PHP Tutorial N-Layer encryption Gzinflate str_rot13 base64 cracking method based on Eval
PHP uses the str_rot13 (Base64_decode (' BASE64 encrypted content ')) to decrypt the core code of the eval (gzinflate)PHP encryption method under non-expansion
The Eval function is a function in PHP that is not a function of the system component, and the disable_functions in php.ini cannot be banned because it is not a php_function.
eval () for PHP security has a lot of damage generally not used in cases
Reprint Address: http://www.myhack58.com/Article/60/61/2014/50632.htmThe eval function of PHP is not a system component function, so we cannot prohibit it by using disable_functions in php.ini.But eval () for PHP security has a lot of damage, so
In PHP, Eval is a function and cannot be disabled directly, but the Eval function is quite dangerous and often there are some problems, today we will look at the Eval function array operation and PHP how to disable the eval () function, the need for
Eval functions: eval functions in JavaScript are one of the most controversial issues of developers. The problem is mainly caused by the possible insecurity. I will not go into details about this issue here. readers may easily browse many
PHP uses eval (gzinflate (str_rot13 (base64_decode ('base64 encrypted content') to decrypt core code
Non-extended php encryption method:
Here is an online product, which is not bad. It's okay to defend against Trojans. It's okay to protect the code.
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