Checking if a string contains a word?

[Markus]

I've made a download page for my friends website.

The download is selected from the $_GET

But there are multiple uses of the page, such as;

downloads of .rars and .zips,

and viewable videos etc.

I would like to know if there's a way i can check what is passed from the $_GET['id']

To show whether it is a .rar or .flv, for example, so appropriate action can be taken to embed the .flv file instead of it showing a download link to the .flv

Example of urls

www.mahcuz.com/wltg.php?id=somefile.rar
www.mahcuz.com/wltg.php?id=somefile.flv
 

Sorry if i'm not precise enough, i can elaborate more if needed.

thanks a bunch :D

[bergy]

Markus,

You want to use the strpos() function. If the specified string (needle) is in your "id" variable (haystack) it will return an integer of the starting position - if not, it will return a "false" value... so something like:

[php]
if(strpos(".flv", strtolower($_GET['id'])) != false){
echo "This is an FLV File!!";
}else{
echo "This is NOT an FLV file!!";
}
[/php]Note, you'll also want to use strtolower to make sure that capitalized file extnesions (.FLV) get included as well.

[Markus]

Markus,

You want to use the strpos() function. If the specified string (needle) is in your "id" variable (haystack) it will return an integer of the starting position - if not, it will return a "false" value... so something like:

[php]
if(strpos(".flv", strtolower($_GET['id'])) != false){
echo "This is an FLV File!!";
}else{
echo "This is NOT an FLV file!!";
}
[/php]Note, you'll also want to use strtolower to make sure that capitalized file extnesions (.FLV) get included as well.

Ahh!

Thanks man :D

Or woman!

Cheers, again.

[bergy]

Ahh!

Thanks man :D

Or woman!

Cheers, again.

Haha - No problem - and I'm all man baby... yeah!

[Markus]

Mmmmm it doesn't work.

It only says that it's an flv file if flv (with no period before) comes immediately after the id=

?id=flv

returns true

?id=something.flv

or

?id=.flv

both return false..

I'm lost.

[karlectomy]

a better way to do this would be to use substr() which will take the last 4 chars into a new string. THis way, the file something.flv.exe won't be uploaded.

[PHP]
$substring = substr(strtolower($_GET['id'], -4));
if($substring == ".flv")
{
echo "This is an FLV File!!";
}
else echo "This is NOT an FLV file!!";
[/PHP]

[kovik]

Or even better, strrpos() would check from the end, so you could get the final extension using strrpos() and substr().

[php]if (($pos = strrpos($_GET['id'], '.')) != false) {
if ($pos < strlen($_GET['id'])) {
switch (strtolower(substr($_GET['id'], $pos + 1))) {
case 'flv':
echo "FLV";
break;
case 'zip':
echo "ZIP";
break;
}
}
}[/php]

[karlectomy]

Or even better, strrpos() would check from the end, so you could get the final extension using strrpos() and substr().

[php]if (($pos = strrpos($_GET['id'], '.')) != false) {
if ($pos < strlen($_GET['id'])) {
switch (strtolower(substr($_GET['id'], $pos + 1))) {
case 'flv':
echo "FLV";
break;
case 'zip':
echo "ZIP";
break;
}
}
}[/php]

Wait, I thought I just did that in 6 lines of code...