Resizing Images PHP GURU ONLY!!!!!!!!!!!

Anon

Now that I have the attentoin of some who knows something I will try to explain this a little better than before

I am trying to upload images from a <form> and then resize the image 2 different times and creates 2 diffrent image files, and then upload the new image files that I resized into 2 different directories.

I want to do this so I will have a thumbnail and a full sized image of the same photo(for catalog application, click on thumbnail and see full sized image)

***************Curent Proccess*************

Step 1. Get image from user**************************

<form enctype="multipart/form-data" action="$PHP_SELF?>?session_id=<?=$session_id?>&action=<?=$action?>" method="post">
<input type="hidden" name=MAX_FILE_SIZE value=100000000>
<input type="File" name="userfile" size="30" accept="image/jpeg, image/pjpeg">
<input type="hidden" name="newname" size="30" maxlength="^255" value="image">

Step 2.Upload Image to server****************************
//Creates Uniqe name for image
$newname = date("Hisz");

//Uploads Image to directory on server
function do_upload($userfile,$newname)
{
$new_file = "/agents/$newname.jpg";

if (!copy($userfile, $new_file)) echo "failed to copy file $userfile to $new_file\n";
return;
}

*************Target Process(what I need to happen)*********

I want to create 2 images with different sizes and then upload them into 2 different directories

resize 1.*******************************
with=150
height=113
directory=/thumnails/$newname.jpg

resize 2. *******************************
width=300
height=225
directory=/agents/$newname.jpg

***************Ideal Process******************************
Step 1/Get Image from User

Step 2/resize image into thumnail(with=150 height=113) and upload to /thumbnails/$newname.jpg

Step 3/resize image into standard larger size(with=300 height=225) and upload to /agents/$newname.jpg

**********Other Comments*****************
I have been messing around with imagecopyresized() and have no Idea what I am doing I do have GD 2.0 installed , I would appreciate some help wit this I am loosing lots of time trying to figure this out and have no expert help available to me

Thanks For Your Help

*********Specs***********
RedHat inux 6.1
PHP 4.0.6
Apache
GD 2.0

khaine

I dont know about me being a guru but I do have a nice little function that could be adapted for your needs.

<?php

function make_thumb($imagefile, $new_w=75, $new_h=75)
{
$img_data=getimagesize($imagefile);
$src_w=$img_data[0];
$src_h=$img_data[1];

$src_img=ImageCreateFromPNG($imagefile) or die ("Cannot open source");
$dst_img=imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src

_h);

chdir("thumbnails");
if ( file_exists("thumb_".$imagefile) )
{
    unlink("thumb_".$imagefile);
}

imagepng($dst_img,"thumb_".$imagefile);

ImageDestroy($src_img);
ImageDestroy($dst_img);

}

make_thumb("music26.png");

It will take the image name given and create a thumbnail in a directory called thumbnails.

It only deals with png images cause thats all I ever needed but you show be able to alter it to use gif, or jpg images easy enough.

Mark.

Anon

what does "thumb_" represent?

Anon

Do you know what this is?

Warning: imagejpeg: unable to open 'thumb_/tmp/phphQBd9d' for writing in /home/freesite/public_html/repro/test.php on line 98

[deleted]

thumbnail perhaps?

[deleted]

Guru only? :-)

More like: "people who can read a manual only".

http://www.php.net/manual/en/function.imagecopyresized.php
http://www.php.net/manual/en/function.imagecopyresampled.php

Full working examples in the annotations.

Anon

Yes I see that it is just part of the new file name,

Vincent

I am getting this error
******Error****************
Warning: imagejpeg: unable to open 'thumb_agents/120740360.jpg' for writing in /home/freesite/public_html/repro/test.php on line 98
***End Error***************

Here is the function

*******Function***************
function make_thumb($imagefile, $new_w=75, $new_h=75)
{
$img_data=getimagesize($imagefile);
$src_w=$img_data[0];
$src_h=$img_data[1];

$src_img=ImageCreateFromJPEG($imagefile) or die ("Cannot open source");
$dst_img=imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src_h);

chdir("thumbnails");
if ( file_exists("thumb".$imagefile) )
{
unlink("thumb".$imagefile);
}

imagejpeg($dst_img,"thumb_".$imagefile);

ImageDestroy($src_img);
ImageDestroy($dst_img);

}

make_thumb("agents/120740360.jpg");

*******End Function*********

I am not quite sure how I am suppose to pass the file to the function that I want to resize

Do I Pass it through make_thumb($file_name) as I have done

or another way?

Anon

The manual examples Blow!!!!!!!!!!!!!

You have to have a full understanding of PHP and have a strong development background to understand most of it, I know most will agree with me the PHP manual is not for begining programmers like myself thats why we have these forums to help solve our problems

khaine

Your error is because the function only looks for a filename and not a directory. you should call it with make_thumb("120740360.jpg"); it will then create thumb_120740360.jpg in the thumbnails directory. If you want it to use a different directory just change to it first. i.e.

chdir("agents");
make_thumb("120740360.jpg");

Mark.

Anon

OK now I am getting these errors

Warning: getimagesize: Unable to open '120740360.jpg' for reading. in /home/freesite/public_html/repro/test.php on line 84

Warning: imagecreatefromjpeg: Unable to open '120740360.jpg' for reading in /home/freesite/public_html/repro/test.php on line 88
Cannot open source

**********This is the function I executed***
function make_thumb($imagefile, $new_w=75, $new_h=75)
{
$img_data=getimagesize($imagefile);
$src_w=$img_data[0];
$src_h=$img_data[1];

$src_img=ImageCreateFromJPEG($imagefile) or die ("Cannot open source");
$dst_img=imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src_h);

chdir("thumbnails");
if ( file_exists("thumb".$imagefile) )
{
unlink("thumb".$imagefile);
}

imagejpeg($dst_img,"thumb_".$imagefile);

ImageDestroy($src_img);
ImageDestroy($dst_img);

}

make_thumb("120740360.jpg");

Whats wrong? Iremoved the agents/ from the parameter

Lets revisit my original question

*********I have a form***********
<form enctype="multipart/form-data" action="$PHP_SELF?>?session_id=<?=$session_id?>&action=<?=$action?>" method="post">
<input type="hidden" name=MAX_FILE_SIZE value=100000000>
<input type="File" name="userfile" size="30" accept="image/jpeg, image/pjpeg">
<input type="hidden" name="newname" size="30" maxlength="^255" value="image">

********Question*******************
How do I pass this image from my form to your function? to be resized and then stored in proper directory as proper size?

I dont see how your function gets the original image to resize!!!!!!!!!!

[deleted]

"You have to have a full understanding of PHP and have a strong development background to understand most of it,"

lol.
No, you just need to be able to read.

The manual says this:

-- quote --
int imagecopyresized (resource dst_im, resource src_im, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH)

ImageCopyResized() copies a rectangular portion of one image to another image. Dst_im is the destination image, src_im is the source image identifier. If the source and destination coordinates and width and heights differ, appropriate stretching or shrinking of the image fragment will be performed. The coordinates refer to the upper left corner. This function can be used to copy regions within the same image (if dst_im is the same as src_im) but if the regions overlap the results will be unpredictable.

-- end quote --

SrcX, DstX, SrcY, and DstY are self-explanatory, and the only thing that is not clear is what they mean by src_im and dst_im.

But then you see this example in the annotations:

<?
$new_w=100;
$new_h=100;

header("Content-type: image/gif");

$dst_img=ImageCreate($new_w,$new_h);

$src_img=ImageCreateFromGif("./imgtest.gif");

ImageCopyResized($dst_img,$src_img,0,0,0,0,$new_w,$new_h,ImageSX($src_img),ImageSY($src_img));

ImageGif($dst_img);

That solves the dst_im and src_im problem.

What more could you possibly need to understand this?

khaine

Ah I forgot to add one little bit. You need to go into the agants directory. if you put chdir("agents"); before the call to make_thumb it should work. Sorry about that.

Mark.

Anon

OK I am now getting this error

****************ERROR************
Warning: ChDir: No such file or directory (errno 2) in /home/freesite/public_html/repro/test.php on line 104

here is the function where I added chdir("agents")

*****************Function***********
function make_thumb($imagefile, $new_w=75, $new_h=75)
{
$img_data=getimagesize($imagefile);
$src_w=$img_data[0];
$src_h=$img_data[1];

$src_img=ImageCreateFromJPEG($imagefile) or die ("Cannot open source");
$dst_img=imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src_h);

chdir("thumbnails");
if ( file_exists("thumb".$imagefile) )
{
unlink("thumb".$imagefile);
}

imagejpeg($dst_img,"thumb_".$imagefile);

ImageDestroy($src_img);
ImageDestroy($dst_img);

}
chdir("agents");
make_thumb("120740360.jpg");

What is the problem?

khaine

hhmmmm this ones a puzzle. try altering the chdir to be the absolute path to the image. i.e. chdir("/usr/local/apache/htdocs/images/agents");

I cant see how that could fail.

Mark.

Anon

KICK ASSSSSSSSSSSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!

Thanks your for your patience and persistence, I have been working on this for 3 days with no results, I owe you big time!!!!!!!!!!

khaine

Any time... Im just glad it works.

saloon12yrd

What more could you possibly need to understand this?

Brain perhaps, I don't know. BTW has anybody realized that the GURU post by jennifer has been posted earlier as "Hardcore PHP developers ONLY!!!!" by christopher from same class c net?

"Hey the boy doesn't get an answer, let's try the girl to craze some lonely geeks" or what? This is funny IMHO.

Dominique

Anon

Dude, use imagemagick for resizing, it resizes everything much nicer and more beautiful :-)

Warm regards,
Emile Bosch

Anon

Well I have my solution so what ever works works!!!!

Thats funny you have nothing else to do with your time but reply with usless commentary

Keep up the doog work 🙂

thats funny

khaine

Whats imagemagick?? I dont think I have seen that one. I cant find it in the manual.

Mark.