'-var_dump(md5(223704217))-' -

To prevent this vulnerability, always use operators or built-in secure hash comparison functions: Use === instead of == .

A "Magic Hash" is a string that, when hashed (using MD5, SHA1, etc.), results in a value that starts with 0e followed only by numbers. In PHP, the 0e prefix is interpreted as ( ), which always evaluates to zero . The Breakdown The Input : The number 223704217 is a specific payload. '-var_dump(md5(223704217))-'

: If a developer uses a "loose comparison" ( == ) to check this hash against another "magic hash" or the literal integer 0 , PHP will "juggle" the types and see both as 0 . Why This is Dangerous To prevent this vulnerability, always use operators or