php image resize? is there no simple method?

unwashed potato!

unwashed potato!

unwashed potato!

Soldato
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really struggling with this, spending far too much time to get absolutely no where with it.

what i want is a simple easy way to get image file, resize it setting the width to a specific size and then having the height shrink proportionally, and then save the image ready for use later on. Does such a thing exists? i have search and searched but every single thing i find doesn't do what i want, creating the thumbnail dynamically. Surely there must be a simple way like with html image tag setting the width of an image, but then saving the image's new width.
 
If you've got ImageMagick in your path it's super-duper easy:

Code: 
<?php
`convert -resize 150x150 foo.jpg foo-small.jpg`;
?>

You have to do it all yourself if you're doing it with GD, but it's not a ridiculously hard thing to do--have a bash at working it out yourself.
 
so GD is the way to do it? sorry if it seems a silly question just image part of php is new to me and far far more powerful then i first anticipated so a lot more confusing at first.

just to check then, the most common method i come across is to use imagecopyresampled, is this correct to use? i can get it working, though not with gif which is needed, but it created on the fly and not saved for use later on. If this is what i am after though with some tweaking then i will continue to investigate it. Just seems a much more complicated way to simply resize an image then i'd expect
 
Yeah, imagecopyresampled is the method you'll use to do the actual resizing; the bit you have to do is calculate the width and height that you'll be resizing to. To save the images, pass a filename to imagejpeg/imagepng/whatever you're outputting the final image as.

Use ImageMagick if you can, though, it'll save a lot of headaches (plus you can do tons more cool stuff with it).
 
thanks everyone, especially robmiller for the advice, really helped and i finally got it exactly how i wanted :)

just a quick unrelated question while have this thread, when i insert into fields into the database each record has a unique id which is auto incremented so i don't know what it is, is there a way to say insert this into the database and return with the id of that record?

i know i could do an insert into query and then after a select query but trouble with that is i don't have a unique id to select from the table so would have to use a few fields at least to be safe which is a lot more work then if there is a better way like i have asked above?

thanks again
 
Mammalian said:
just a quick unrelated question while have this thread, when i insert into fields into the database each record has a unique id which is auto incremented so i don't know what it is, is there a way to say insert this into the database and return with the id of that record?
Click to expand...

Either:

http://uk.php.net/mysql_insert_id

...or:

Code: 
SELECT LAST_INSERT_ID() FROM foo

...where `foo` is your table.
 
Always use mysql_insert_id() rather than the query, because there's no garuntee that someone else hasn't done another insert in between you doing it and the query.
 
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