php $HTTP_SERVER_VAR[]

[peterjc]

I am really new to php. So i hope someone could help me to solve the difficulty that i face.

 

Could someone please help me to explain what is the use of $HTTP_SERVER_VAR[];.

 

 

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$page_location = $page_location ."?". $HTTP_SERVER_VAR["QUERY_STRING"];

 

What is the use of the question mark that is put in between $page_location and $HTTP_SERVER_VAR?

 

And what does the query_string mean?

 

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And another question is what does the "\r" mean in php. why it is use in the email injection check.

 

 

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By providing a simple example for the explanation is much appreciated

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thank you

[HaLo2FrEeEk]

I THINK that \r is a type of line break, like \n, they are usually used in conjunction, ie. \r\n.

 

I also THINK that the question mark is put there as sort of an if/then statement, this is how I use them:

 

$var1 = ($var2) ? print "true" : print "false";

 

Basically, this is saying, if $var2 returns true ($var2 would have to return either a true or a false, since this is interpreting it as a boolean), then (?) print "true, otherwise ( print "false", does that make sense?

 

As for the HTTP_SERVER_VAR, I have no clue, and a quick google search turned up nothing, sorry.

[DanDaBeginner]

for this one: $HTTP_SERVER_VAR["QUERY_STRING"]; , example in this forum, look at the url.

do you see "action=post;topic=130415.0;num_replies=1" that is the query string...

 

try this code: all the $HTTP_SERVER_VAR[] is in there:

PHP contains all the information for SERVER...

<?

phpinfo()

?>