fix spell

README.md

@@ -4,7 +4,7 @@ Your favourite tool to bypass __disable_functions__ and __open_basedir__ in your
 
 ## How it works
 
-PHP in Linux calls a binary (sendmail) when the mail() function is executed. If we have putenv() allowed, we can set the enviroment variable "LD_PRELOAD", so we can preload an arbitrary shared object. Our shared object will execute our custom payload (a binary or a bash script) without the PHP restrictions, so we can have a reverse shell, for example.
+PHP in Linux calls a binary (sendmail) when the mail() function is executed. If we have putenv() allowed, we can set the environment variable "LD_PRELOAD", so we can preload an arbitrary shared object. Our shared object will execute our custom payload (a binary or a bash script) without the PHP restrictions, so we can have a reverse shell, for example.
 
 ## Example: