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Looking for a certain constant.

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Jan 05.2006

Looking for the constant that contains the path to the page that referred the client(the last page the client visited). I want to use in to verify that the client applies from the form that i provided,
Thanks in advance!.
Also can some one advice me which functions check the type of variable
so i can verify that all the chars are alpha-normal and that the user don’t trying any injections…

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PHP

9 Comments(s) ↴

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@SpectreReturnsJan 05.2006 — $_SERVER["HTTP_REFERER"]. However, this is not accurate, so you should not depend on it.
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@HellgYauthorJan 06.2006 — Can some one please assist me with the second matter?.
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@chazzyJan 06.2006 — you could take a look at regular expressions...
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@UbikJan 06.2006 — You can use the htmlspecialchars() function to code inserted data into your db, which [I]mostly[/I] takes care of SQL injection attacks.
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@NogDogJan 06.2006 — If using MySQL:
[code=php]
// make text safe for MySQL database insert/update:
function sanitize_input($input)
{
if(get_magic_quotes_gpc())
{
$input = stripslashes($input);
}
return(mysql_real_escape_string($input));
}
[/code]
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@bokehJan 07.2006 — (the last page the client visited).[/QUOTE]$_SERVER["HTTP_REFERER"]. [/QUOTE]$_SERVER["HTTP_REFERER"] doesn't necessarilly contain "the last page the client visited". It should, (but may not,) contain the reffering page. In the majority of cases that is the loaded page and not the previous page.
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@SpectreReturnsJan 08.2006 — In the majority of cases that is the loaded page and not the previous page.[/QUOTE] Why's that? Isn't the referer where you came from?
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@HellgYauthorJan 08.2006 — If a certain error occurs and the page is unavailable, and the user choose to recover the data that was sent to the form, the variable will contain NULL value...
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@bokehJan 08.2006 — Why's that? Isn't the referer where you came from?[/QUOTE]Not necessarilly! For example, in the case of images, css, swf, and js files it is the html file that is currently being viewed, i.e. the referer.
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