Offensive and defensive world - web2

Open the topic, which directly gives the code, code analysis

strrev() function reverses a string.

strlen() function returns the length of the string substr() function returns part of the string.

The ord() function returns the ASCII value of the first character in a string.

chr() function returns the character from the specified ASCII value.

str_rot13() function performs ROT13 encoding on a string.str_rot13(), encoding and decoding are done by this function, if the encoded string is used as a parameter, the original string is returned

Given is already Encrypted the string, as well as the encryption method, reverse decryption according to the code