Generate multiple image sizes upon upload

upload.php

// Load do wideimage
$image = WideImage::load($file_path);
 
// Processar cada tamanho de imagem
foreach ($this->image_sizes as $key => $image_size) {
 
    if ($image_size['crop'] === true) {
        $image->resize($image_size['width'], $image_size['height'], 'outside', 'down')->crop('center', 'top', $image_size['width'], $image_size['height'])->saveToFile($uploads_dir.$file_name_a.'-'.$key.$file_name_b);
    } else {
        $image->resize($image_size['width'], $image_size['height'], 'inside', 'down')->saveToFile($uploads_dir.$file_name_a.'-'.$key.$file_name_b);
    }
 
}
 
// Aqui apanhas o ficheiro com o path do sistema, nao url
$image_attributes = getimagesize($file_path);
 
// Eu tenho um array onde especifico os tamahos de imagem, isto é a adicao do tamanho original mesmo antes de processar tudo
$this->image_sizes['original'] = array(
    'width' => $image_attributes[0],
    'height' => $image_attributes[1],
    'crop' => false
);
 
// Armazenar os dados de cada tamanho num array
$attachment_meta = array();
 
// Para cada tamanho de imagem processo os dados do mesmo
foreach ($this->image_sizes as $key => $image_size) {
    switch ($key) {
    case 'original' :
        $attachment_meta[$key] = array(
                'src' => $this->config->base_url.'uploads/'.$file_name,
                'width' => $image_size['width'],
                'height' => $image_size['height']
        );
        break;
    default :
        $image_path = $uploads_dir . $file_name_a.'-'.$key.$file_name_b;
        $image_attributes = getimagesize($image_path);
        $attachment_meta[$key] = array(
                'src' => $this->config->base_url.'uploads/'.$file_name_a.'-'.$key.$file_name_b,
                'width' => $image_attributes[0],
                'height' => $image_attributes[1]
        );
        break;
    }
}
 
// Save each image size meta data
foreach ($attachment_meta as $key => $value) {
    update_item_meta($attachment_id, $key, json_encode($value));
}