PHP eval function A word trojan code _php tutorial

PHP eval function A word trojan code

This is a common word of PHP Trojan code, through the post Trojan to implement the Trojan, the eval () function to the string according to the PHP code to calculate. The string must be a valid PHP code and must end with a semicolon. If no return statement is called in the code string, NULL is returned. If there is a parsing error in the code, the eval () function returns FALSE.

Eval can be used to execute any other PHP code, so be careful about the Eval function found in the code, probably a Trojan

In this sentence to kill people, so that anyone can post any file up, so be prepared to prevent

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The use of the method is also very simple, the local commit file point to the commit file, the inside of the PHP code will be executed

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