I made a calculation of the proportion between width and height from the maximum dimensions and the same thing from
actual dimensions of the picture: I then compared the two resizing in the appropriate direction depending on whether the result is
positive or negative.
Finally, my code works:)
For cons, I still have that to make a thumbnail of my image, the principle and calculated the center of the height and width of the image and make a thumbnail from the center as shown in the image
www.mestestes.eu / proportion.jpg
I await your comments
Here is my code that works well
<html>
<head></head>
<body>
<!--On affiche le formulaire d'envoi d'une image-->
<center>
<br /><hr />
<form method="post" enctype="multipart/form-data" action="upload.php">
<p>
Le nom de l'image redimensionner avec 95 ,95
<input type="text" name="video"><br><br>
<input type="file" name="fichier" size="30">
<input type="submit" name="upload" value="Uploader">
</p>
</form>
</center>
</body>
</html>
[/php]
[PHP]
<?php
$nomImage=$_POST['video'];
if( isset($_POST['upload']) ) // si formulaire soumis
{
$content_dir = 'upload/'; // dossier où
sera déplacé le fichier
$tmp_file = $_FILES['fichier']['tmp_name'];
if( !is_uploaded_file($tmp_file) )
{
exit("Le
fichier est introuvable");
}
// on vérifie maintenant l'extension
$type_file = $_FILES['fichier']['type'];
if( !
strstr($type_file, 'jpg') && !strstr($type_file, 'jpeg') && !strstr($type_file, 'png') && !strstr($type_file, 'bmp') && !strstr
($type_file, 'gif') )
{
exit("Le fichier n'est pas une image");
}
// on copie le fichier dans le dossier de
destination
$ext = substr($_FILES['fichier']['name'], strrpos($_FILES['fichier']['name'], '.'));
$name_file =
$nomImage.$ext;
echo $name_file;
//fonction pour changer les dimentions des fichiers
function redimensionner
($file, $maxwidth, $maxheight) {
list($rawwidth, $rawheight, $type) = @getimagesize($file);
if
($maxwidth < $rawwidth && $rawwidth >= $rawheight) {
$width = $maxwidth;
$height = ($width / $rawwidth) * $rawheight; }
if ($maxheight <
$rawheight && $rawheight >= $rawwidth) {
$height = $maxheight;
$width = ($height / $rawheight) * $rawwidth; }
if($height > $maxheight) {
$width = ($maxheight / $height) * $width;
$height = $maxheight; }
$imgbuffer =
imagecreatetruecolor($width, $height);
switch($type) {
case 1: $image = imagecreatefromgif($file); break;
case 2: $image =
imagecreatefromjpeg($file); break;
case 3: $image = imagecreatefrompng($file); break;
case 4: $image = imagecreatefrombmp
($file); break;
default: exit("Tried to create thumbnail from $file: not a valid image");
}
if (!$image) exit("Image creation
from $file failed for an unknown reason. Probably not a valid image.");
else {
imagecopyresampled($imgbuffer, $image, 0, 0, 0,
0, $width, $height, $rawwidth, $rawheight);
imageinterlace($imgbuffer);
switch($type) {
case 1:
$image = imagegif($imgbuffer, $file, 80); break;
case 2: $image = imagejpeg($imgbuffer, $file, 80); break;
case 3:
$image = imagepng($imgbuffer, $file, 7); break;
}
}
}
if( preg_match('#[\x00-\x1F\x7F-\x9F/\\\\]#', $name_file) )
{
exit("Nom
de fichier non valide");
}
else if( !move_uploaded_file($tmp_file, $content_dir . $name_file) )
{
exit("Impossible de copier le
fichier dans $content_dir");
}
redimensionner($content_dir.$name_file,171, 107);
}
?>
