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February 27th, 2013, 04:05 PM

n1kol4n1k

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PHP-DB - Create image

Hi guys, i have problem with php. I want to make website which create baner for user when they fill out the form. This is banner (without text and image):

misterijeforum.com/nik/images/medium.png

I made form also. link: misterijeforum.com/nik/small.html
But i got problems with php script. I'm not php programmer, but i created "something" [

]

PHP Code:


		
			
<?php

header('Content-Type: image/png');



$im = ImageCreateFromPng("images/medium.png"); 



$black = imagecolorallocate($im, 0, 0, 0);

$ime = "$fullname";

$interests = "%interests";

$school = "%school";

$fb = "%facebook";

$msn = "%msn";

$mail = "%mail";

$start_x = 1;

$start_y = 1;

Imagettftext($im, 12, 0, $start_x, $start_y, $black, 'verdana.ttf', $ime);



Imagepng($im);



ImageDestroy($im);





?>

I made just for full name, but i don't know how to storage that new image in folder "images" and show image to user. And is this code good ?

February 27th, 2013, 04:36 PM

requinix

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Is that the actual code you have? There's a few big and obvious problems with it, like using "%interests" and that you only call imagettftext() for the $ime.

As to your question, imagepng() can take a filename to save to as its second argument. Make sure your images folder has permissions 0777 (which you can set with FTP or probably whatever file browsing tool you have available).

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February 27th, 2013, 05:01 PM

n1kol4n1k

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Quote:

Originally Posted by requinix

Huh, that code is ****

I just found it on internet and modified it. Can you explain me how to do that or better to give me code. So i want to, when user fill out the form and click on "submit", it generate benner with informations which user write in form and that picture/banner storage in folder "images". Backgroud of banner will be misterijeforum.com/nik/images/medium.png . Thank you so much

February 27th, 2013, 06:15 PM

requinix

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I can't write it for you but that should be okay as what you have now is a decent enough start. The script to generate the image (and not display it) goes like this:

Code:

imagecreatefrompng() the original "template" image you want

pick a color for the text
imagettftext() all the different strings onto the image, at the right location, using the text color
// you'll have to play around with the text offset until you get it in the right place
// text length is a concern...

imagepng() the image to the final destination
imagedestroy() the image

- Question: what if someone enters a really long name? How do you want to deal with the fact that it would run off the image?
- You should put this in a function with parameters for the different pieces of information as well as the place where the new image should be saved

February 27th, 2013, 07:30 PM

n1kol4n1k

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Quote:

Originally Posted by requinix

I can't write it for you but that should be okay as what you have now is a decent enough start. The script to generate the image (and not display it) goes like this:

Code:

imagecreatefrompng() the original "template" image you want

pick a color for the text
imagettftext() all the different strings onto the image, at the right location, using the text color
// you'll have to play around with the text offset until you get it in the right place
// text length is a concern...

imagepng() the image to the final destination
imagedestroy() the image

PHP Code:


		
			
<?php 

header('Content-Type: image/png'); 

$im = imagecreatefrompng("medium.png");

$textcolor = imagecolorexact($im, 255, 255, 255); 

imagefttext($im, 10, 0, 5, 5, $textcolor, "C:/WINDOWS/Fonts/tahoma.ttf", "Some text"); 

Imagepng($im); 

ImageDestroy($im);  

?>

I think it's ok for now. How to put now generated image to folder "banners" (example) as .png file and display it?

-Well, i want first to make it works, details later

February 27th, 2013, 07:33 PM

requinix

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When posting code, paste your code into the textbox, select it, and then hit the PHP code button. If you paste it into that dialog then all the line breaks disappear and the result is totally unreadable.

Like I said earlier, if you want to save the image somewhere then pass a filename to imagepng(). Read the documentation if you're not sure what I mean.

February 27th, 2013, 07:47 PM

n1kol4n1k

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Fixed. Ok i must go to sleep now, i will post tomorrow. Thanks for help.

February 28th, 2013, 03:40 PM

n1kol4n1k

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Problems again

I really don't know what to do, everything i try to do, when i run script it's showing: i.imgur.com/C7uvgly.png . Now i have this code:

PHP Code:


		
			
<?php



header('Content-Type: image/png'); 

$im = imagecreatefrompng("medium.png");

$textcolor = imagecolorexact($im, 255, 255, 255); 

imagefttext($im, 10, 0, 5, 5, $textcolor, "tahoma.ttf", "Some text"); 

$save = "../sigs/". time() .".png";

imagepng($im, $save);

imagedestroy($im);



?>

Please help me.

February 28th, 2013, 04:06 PM

requinix

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Please don't link me to imgur, I need to get some work done today

Your call to imagepng() will only save the image. It will not output it as well.

In general when you see the "the image cannot be displayed" error, remove any header() you might have that changes the Content-Type and refresh: there's typically an error message somewhere.

Comments on this post

n1kol4n1k agrees: I know i don't have rep. points, but thank you very much

#10

February 28th, 2013, 05:52 PM

n1kol4n1k

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Quote:

Originally Posted by requinix

Your call to imagepng() will only save the image. It will not output it as well.

How to do that? Sorry for stupid questions i'm beginner. And when i remove header() function, it's show 2 errors, first:
-Could not find/open font- But i put tahoma.ttf .
- Unable to open '../sigs/1362094888.png' for writing- i suppose that is what you are talking about output.

#11

February 28th, 2013, 06:13 PM

requinix

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Quote:

Originally Posted by n1kol4n1k

-Could not find/open font- But i put tahoma.ttf .

Did you give the right path to it? What happened to the C:\Windows\Fonts you had before?

Quote:

Originally Posted by n1kol4n1k

- Unable to open '../sigs/1362094888.png' for writing- i suppose that is what you are talking about output.

That's a common issue. Depending how PHP is running it may or may not have permission to create files and folders. Are you using IIS?

PHP-DB - Create image

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