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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
addslashes() & stripslashes() question

Posted by Chris_Isaac (Chris Isaac), 15 March 2006

I used the addslashes function on some data coming in off a web page, but when I came to do the reverse I had to use Stripslashes(stripslashes(data)) to remove all the '\'.

Is this normal to have to double up on the stripslashes function?

Posted by admin (Graham Ellis), 16 March 2006
Hi, Chris .... sorry it's taken a while - I've been fighting a denial of service attack against our servers ....

If your server has a default configuration, with magic quotes ON then you don't need to add slashes at all as you put the data through to the database, and it will come off clean without the need to stripslashes at all.   In this configuartion, if you want to use the data that the user has entered for something OTHER THAN putting into the database, you'll need to stripslash it.

If magic quotes are OFF then you need to addlslashes to all user inputs before you put them up to the database. Failure to do so would leave you open to an injection attack.

Posted by Chris_Isaac (Chris Isaac), 17 March 2006
Thanks Graham, Magic quotes was on problem cured!

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