php rename file problem

hansolo669 · Feb 28, 2012

this is probably a simple problem, but the solution seems to be escaping me at the moment.
(edited cause my original idea was dumb)

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/" . $_FILES["file"]["name"]);

how would i get that to (when moveing the file) also rename the file to the result of a varible?

ppc_michael · Feb 28, 2012

If I'm understanding your question, replace the $_FILES["file"]["name"] variable with the variable that contains the name you want to save it as.

So if $newname contains the new file name you want to save it as, your code would be

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/" . $newname);

hansolo669 · Feb 28, 2012

ppc_michael said:
If I'm understanding your question, replace the $_FILES["file"]["name"] variable with the variable that contains the name you want to save it as.

So if $newname contains the new file name you want to save it as, your code would be

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/" . $newname);

yup! thanks a bunch.
my actualy code ended up as such:

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/{$newname}" . $ext);

but that was to allow for keeping the ext

ppc_michael · Feb 28, 2012

Looks good! By the way, instead of the curly brackets you could also do:

PHP:

"images2012/".$newname.$ext

But yours works just as well.

bpaluzzi · Feb 29, 2012

ppc_michael said:
Looks good! By the way, instead of the curly brackets you could also do:

PHP:

"images2012/".$newname.$ext

But yours works just as well.

Just for the sake of completeness -- when you're using double quotes, you don't even need the curly braces. The following will work:

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/$newname$ext");

Note that this requires two conditions to be met:
1 - "simple" variable name, in the form of $variablename. E.g., not $foo['bar'] or $foo->bar
2 - double quotes. 'images2012/$newname' won't work, because single-quoted aren't run through the parser. which, incidentally, is why you should use single quotes for most strings (unless you need variable replacement, or some non-printing characters, e.g., \n) -- less processing overhead.

hansolo669 · Feb 29, 2012

bpaluzzi said:
Just for the sake of completeness -- when you're using double quotes, you don't even need the curly braces. The following will work:

PHP:

move_uploaded_file($_FILES["file"]["tmp_name"], "images2012/$newname$ext");

Note that this requires two conditions to be met:
1 - "simple" variable name, in the form of $variablename. E.g., not $foo['bar'] or $foo->bar
2 - double quotes. 'images2012/$newname' won't work, because single-quoted aren't run through the parser. which, incidentally, is why you should use single quotes for most strings (unless you need variable replacement, or some non-printing characters, e.g., \n) -- less processing overhead.

learn something new everyday

thank you, incidentally i was wondering what the difference was between single and double quotes, and now i know!

bpaluzzi · Feb 29, 2012

hansolo669 said:
learn something new everyday
thank you, incidentally i was wondering what the difference was between single and double quotes, and now i know!

Glad to help!

I will say that, while my example above works fine, stylistically, I'm not a big fan of multiple variables in double quotes like that.

In other words,
I'm okay with this:

PHP:

echo "This is the variable value $value"

But I'm not a fan of this:

PHP:

echo "This is two variables now $value1$value2"

Again, this isn't due to it not working, it's just a style thing - makes it tough to scan the values.

For multiple variables, I generally do it similar to the way ppc_michael described.

PHP:

echo 'This is two variables now ' . $value1 . $value2

Also, the performance increase is so small as to be imperceptible. IMO, unless you're dealing with tens of thousands of strings, and need to wrangle every absolute micro-second out of your code, it's probably best to just to stick with double-quotes. You get the variable extraction / escaping as needed, and can be consistent in your code.

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