Code PHP:
function resizedName($file, $width, $height){
$info = pathinfo($file);
$return = '';
if($info['dirname'] != '.'){
$return .= $info['dirname'] . '/';
}
$return .= $info['filename'] . "_$width". "x$height." . $info['extension'];
return $return;
}
function resizeImage($file, $width, $height){
# We find the right file
$pathinfo = pathinfo(trim($file, '/'));
$output = $pathinfo['dirname'] . '/' . $pathinfo['filename'] . '_' . $width . 'x' . $height . '.' . $pathinfo['extension'];
# Setting defaults and meta
$info = getimagesize($file);
list($width_old, $height_old) = $info;
# Create image ressource
switch ( $info[2] ) {
case IMAGETYPE_GIF: $image = imagecreatefromgif($file); break;
case IMAGETYPE_JPEG: $image = imagecreatefromjpeg($file); break;
case IMAGETYPE_PNG: $image = imagecreatefrompng($file); break;
default: return false;
}
# We find the right ratio to resize the image before cropping
$heightRatio = $height_old / $height;
$widthRatio = $width_old / $width;
$optimalRatio = $widthRatio;
if ($heightRatio < $widthRatio) {
$optimalRatio = $heightRatio;
}
$height_crop = ($height_old / $optimalRatio);
$width_crop = ($width_old / $optimalRatio);
# The two image ressources needed (image resized with the good aspect ratio, and the one with the exact good dimensions)
$image_crop = imagecreatetruecolor( $width_crop, $height_crop );
$image_resized = imagecreatetruecolor($width, $height);
# This is the resizing/resampling/transparency-preserving magic
if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG) ) {
$transparency = imagecolortransparent($image);
if ($transparency >= 0) {
$transparent_color = imagecolorsforindex($image, $trnprt_indx);
$transparency = imagecolorallocate($image_crop, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
imagefill($image_crop, 0, 0, $transparency);
imagecolortransparent($image_crop, $transparency);
imagefill($image_resized, 0, 0, $transparency);
imagecolortransparent($image_resized, $transparency);
}elseif ($info[2] == IMAGETYPE_PNG) {
imagealphablending($image_crop, false);
imagealphablending($image_resized, false);
$color = imagecolorallocatealpha($image_crop, 0, 0, 0, 127);
imagefill($image_crop, 0, 0, $color);
imagesavealpha($image_crop, true);
imagefill($image_resized, 0, 0, $color);
imagesavealpha($image_resized, true);
}
}
imagecopyresampled($image_crop, $image, 0, 0, 0, 0, $width_crop, $height_crop, $width_old, $height_old);
imagecopyresampled($image_resized, $image_crop, 0, 0, ($width_crop - $width) / 2, ($height_crop - $height) / 2, $width, $height, $width, $height);
# Writing image according to type to the output destination and image quality
switch ( $info[2] ) {
case IMAGETYPE_GIF: imagegif($image_resized, $output, 80); break;
case IMAGETYPE_JPEG: imagejpeg($image_resized, $output, 80); break;
case IMAGETYPE_PNG: imagepng($image_resized, $output, 9); break;
default: return false;
}
return true;
}
?>
En local, cela fonctionne bien: dans le dossier slider, mon image de base s'enregistre comme cela: nom_image.jpg