if extension exists?

[tgillespie]

Need a little help writing an if statement to check if a certain file with the following extension is present.

if(file_exists("/" . * . ".jpg")) I realize php cannot use *as a wild card character, but was just curious as to how someone woulduse a wildcard file name with a .jpg extension this this statement.

[filburt1]

<a href="http://us4.php.net/manual/en/function.readdir.php" target="_blank">http://us4.php.net/manual/en/function.readdir.php</a> ?

[deathemperor]

what does !== mean ?

[Brad]

what does !== mean ?
Basicly $x !== $y means $x is not equal to $y

[noppid]

It means that if the variables are not cast as the same type they will eval as not equal.

[filburt1]

what does !== mean ?
If they are not the same exact value.

== compares string representations; != is the inverse
=== compares the exact values depending on the type; !== is the inverse

For example:

123 == "123" // is true
123 === "123" // is false; the first is numeric, the second is a string

[tgillespie]

Thanks filburt. Readdir was exactly what I was looking for.

[sabret00the]

can i just ask what's the difference between != and !==?

nevermind it appears to be the same as == and === :-S

[AN-net]

so wait...
== is used for numerics and === is used for strings. woops^.^

[Guest190829]

so wait...
== is used for numerics and === is used for strings. woops^.^

No, I think == means equal, while === means identical. It's not based on whether it's a string or numerical value.

In filburt's example


123 == "123" // is true
123 === "123" // is false; the first is numeric, the second is a string


123 is equal to "123" // is true
123 is identical to "123" // is false, the quotations indicate the 123 as a string.

I could be wrong though. I'm still learning.

[filburt1]

Manual == good.

http://us3.php.net/manual/en/language.operators.comparison.php

[Marco van Herwaarden]

Simple put == means it holds the same value, === is also checking on the type.

[deathemperor]

nice points, thanks guys