Upload Image Files
<p>I wonder whether someone could help me please.</p>

<p>Through the use of some online tutorials and 'trial and error' I've put together the script below which allows a user to upload image files.</p>

<pre><code>&lt;?php
//define a maxim size for the uploaded images
//define ("MAX_SIZE","100"); 
// define the width and height for the thumbnail
// note that theese dimmensions are considered the maximum dimmension and are not fixed, 
// because we have to keep the image ratio intact or it will be deformed
define ("WIDTH","150"); 
define ("HEIGHT","100"); 

// this is the function that will create the thumbnail image from the uploaded image
// the resize will be done considering the width and height defined, but without deforming the image
function make_thumb($img_name,$filename,$new_w,$new_h)
{
//get image extension.
$ext=getExtension($img_name);
//creates the new image using the appropriate function from gd library
if(!strcmp("jpg",$ext) || !strcmp("jpeg",$ext))
$src_img=imagecreatefromjpeg($img_name);

if(!strcmp("png",$ext))
$src_img=imagecreatefrompng($img_name);

//gets the dimmensions of the image
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);

// next we will calculate the new dimmensions for the thumbnail image
// the next steps will be taken: 
// 1. calculate the ratio by dividing the old dimmensions with the new ones
// 2. if the ratio for the width is higher, the width will remain the one define in WIDTH variable
// and the height will be calculated so the image ratio will not change
// 3. otherwise we will use the height ratio for the image
// as a result, only one of the dimmensions will be from the fixed ones
$ratio1=$old_x/$new_w;
$ratio2=$old_y/$new_h;
if($ratio1&gt;$ratio2) {
$thumb_w=$new_w;
$thumb_h=$old_y/$ratio1;
}
else {
$thumb_h=$new_h;
$thumb_w=$old_x/$ratio2;
}

// we create a new image with the new dimmensions
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);

// resize the big image to the new created one
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 

// output the created image to the file. Now we will have the thumbnail into the file named by $filename
if(!strcmp("png",$ext))
imagepng($dst_img,$filename); 
else
imagejpeg($dst_img,$filename); 

//destroys source and destination images. 
imagedestroy($dst_img); 
imagedestroy($src_img); 
}

// This function reads the extension of the file. 
// It is used to determine if the file is an image by checking the extension. 
function getExtension($str) {
$i = strrpos($str,".");
if (!$i) { return ""; }
$l = strlen($str) - $i;
$ext = substr($str,$i+1,$l);
return $ext;
}

// This variable is used as a flag. The value is initialized with 0 (meaning no error found) 
//and it will be changed to 1 if an error occurs. If the error occures the file will not be uploaded.
$errors=0;
// checks if the form has been submitted
if(isset($_POST['Submit']))
{

// cleaning title field 
$title = 'title'; 

if ($title == '') // if title is not set 
$title = '(No Title Provided)';// use (empty title) string 

//reads the name of the file the user submitted for uploading
$image=$_FILES['image']['name'];
// if it is not empty
if ($image) 
{
// get the original name of the file from the clients machine
$filename = stripslashes($_FILES['image']['name']);

// get the extension of the file in a lower case format
$extension = getExtension($filename);
$extension = strtolower($extension);
// if it is not a known extension, we will suppose it is an error, print an error message 
//and will not upload the file, otherwise we continue
if (($extension != "jpg") &amp;&amp; ($extension != "jpeg") &amp;&amp; ($extension != "png")) 
{
echo '&lt;b&gt; Error! &lt;/b&gt; - The image that you attempted to upload is not in the correct format. The file format &lt;b&gt; must &lt;/b&gt; be one of the following: &lt;b&gt; "jpg", "jpeg" &lt;/b&gt; or &lt;b&gt; "png" &lt;/b&gt;. Please try again.';
$errors=1;
}
else
{
// get the size of the image in bytes
// $_FILES[\'image\'][\'tmp_name\'] is the temporary filename of the file in which the uploaded file was stored on the server
$size=getimagesize($_FILES['image']['tmp_name']);
$sizekb=filesize($_FILES['image']['tmp_name']);

//compare the size with the maxim size we defined and print error if bigger
if ($sizekb &gt; 1150000)
{
echo '&lt;b&gt; Error! &lt;/b&gt; - The file that you are attempting to upload is greater than the prescribed &lt;b&gt; 1MB &lt;/b&gt; limit. Please try again.';
$errors=1;
}

//we will give an unique name, for example the time in unix time format
$image_name=$title.'.'.$extension;
//the new name will be containing the full path where will be stored (images folder)
$newname="images/".$image_name;
$copied = copy($_FILES['image']['tmp_name'], $newname);
//we verify if the image has been uploaded, and print error instead
if (!$copied) 
{
echo '&lt;b&gt; Error! &lt;/b&gt; Your file has not been loaded';
$errors=1;
}
else
{
// the new thumbnail image will be placed in images/thumbs/ folder
$thumb_name='images/thumbs/'.$image_name;
// call the function that will create the thumbnail. The function will get as parameters 
//the image name, the thumbnail name and the width and height desired for the thumbnail
$thumb=make_thumb($newname,$thumb_name,WIDTH,HEIGHT);
}} }}

//If no errors registred, print the success message and show the thumbnail image created
if(isset($_POST['Submit']) &amp;&amp; !$errors) 
{
echo '&lt;br&gt;&lt;b&gt; Success! &lt;/b&gt; - Your image has been uploaded&lt;/br&gt;';
echo '&lt;img src="'.$thumb_name.'"&gt;';
}

?&gt;
&lt;!-- next comes the form, you must set the enctype to "multipart/form-data" and use an input type "file" --&gt;

&lt;form name="newad" method="post" enctype="multipart/form-data" action=""&gt;
&lt;table&gt;
&lt;tr&gt;&lt;td&gt;&lt;input type="text" name="title" &gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;&lt;input type="file" name="image" &gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;&lt;input name="Submit" type="submit" value="Upload image"&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt; 
&lt;/form&gt;
</code></pre>

<p>I appreciate that this may be a real beginners question, but I'm having problems in saving the 'Title' provided by the user as a form of identifying the image file. If the user doesn't provide a 'Title', the words '(No Title Provided)' are saved as the filename, and I can get this to work correctly, but if I complete the 'Title' text field, the value isn't pulled and inserted as the filename. </p>

<p>I know that the answer lies within this piece of code:</p>

<pre><code>$title = 'title'; 

if ($title == '') // if title is not set 
$title = '(No Title Provided)';// use (empty title) string 
</code></pre>

<p>But I've tried all manner of ways to try and overcome this without any luck. I just wondered whether someone could perhaps take a look at this please and let me know where I've gone wrong.</p>

<p>Many thanks and kind regards.</p>
