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Gareth Heyes' Blog:
htmlentities is badly designed
November 26, 2007 @ 10:23:00

Gareth Heyes has a quick new post to his blog today about the use of htmlentities and the false assumptions some developers have about it:

When someone uses htmlentities I've seen it time and time again that they expect that it filters variables from all XSS. This is wrong of course because the function requires a second parameter ENT_QUOTES which correctly replaces quote characters. Some developers aren't even aware that quotes can lead to XSS injection.

He reminds developers of the second parameter - the ENT_QUOTES parameter that correctly replaces quotes. Other people have mentions things in the comments as well like another optional parameter to force an encoding type and opinions about the function's use.

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