note 64860 deleted from function.extract by bjori

Note Submitter: Don't supply underscore in prefix! Reason: useless ---- I found this out the hard way. The book I'm reading does not actually show an example of a prefix, and it just finally dawned on me when I was reading this page. I'm using EXTR_PREFIX_ALL but it wasn't working. I kept trying to find the error (I thought it must be a spelling or syntax error...well, I suppose it qualifies as a syntax error, but you wouldn't know), and I saw nothing wrong with my code, but none of the array values were getting echoed to the page. [b]You [color=red]cannot[/color] supply an underscore in your prefix.[/b] The underscore is automatically supplied by the function. You'd think it would just result in 2 underscores in a row, but this is not the case. This function must not allow an underscore in this prefix string. [b]acceptable: [/b][size=small]extract($slideshowPics, EXTR_PREFIX_ALL, 'PIC');[/size] [b][color=red]not[/color] acceptable :[/b][size=small]extract($slideshowPics, EXTR_PREFIX_ALL, 'PIC_');[/size] I was did not provide an underscore because I wasn't aware the function supplied it. And if I had prefered no underscore, I would have found out that the function supplied it anyway.