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

Expand|Select|Wrap|Line Numbers

 
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

Quote:

Originally Posted by 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.

Ahh!

Thanks man :D

Or woman!

Cheers, again.

bergy

Quote:

Originally Posted by markusn00b

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

Quote:

Originally Posted by volectricity

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...

Checking if a string contains a word?

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re: Checking if a string contains a word?

re: Checking if a string contains a word?

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