upload.php

<?php

// from file
function make_image2($imagefile, $opt = array())
{
    // deault option
    $opt = array_merge(array(
        'crop' => 0,
        'resize' => 0,
        'width' => 50,
        'height' => 50,
        'list' => null,
    ), $opt);
    
    $extention = $image_type = end(explode('.', $imagefile));

    $tmp_img = $imagefile;
    
    return _make_image($tmp_img, $image_type, $extention, $opt);
}

function _make_image($tmp_img, $image_type, $extention, $opt)
{
    $resize = $opt['resize'];
    $opt_list = $opt['list'];
    if (!$opt_list) {
        $opt_list = array($opt);
    }

    $ret = array();
    foreach ($opt_list as $opt_) {
        if ($resize) {
            $content = image_file_resize($tmp_img, $image_type, $opt_['crop'], $opt_['width'], $opt_['height']);
        } else {
            $content = file_get_contents($tmp_img);
        }
        $file_name = uniqid() . '.' . $extention;
        $ret[] = write_upload($content, $file_name);
    }
    return count($ret) === 1 ? reset($ret) : $ret;
}

/**
 * main function
 * @param type $image is xx in $_FILES['xx']
 * @param type $opt resize crop width height
 * @return string url of the final img
 * @throws Exception
 */
function make_image($image, $opt=array()) {
    
    // default option
    $opt = array_merge(array(
        'crop' => 0,
        'resize' => 0,
        'width' => 50,
        'height' => 50,
        'list' => null,
    ), $opt);
    
    $image = $_FILES[$image];
    
    $arr = explode('/', $image['type']);
    $file_type = reset($arr);
    $image_type = end($arr);
    if ($file_type == 'image') {
        
        $extention = file_ext($image['name']);
        
        $tmp_img = $image['tmp_name'];

        return _make_image($tmp_img, $image_type, $extention, $opt);
    } else { // maybe throw??
        return '';
    }
}

// write file content to dst
function write_upload($content, $file_name) {
    if (ON_SAE) {
        $up_domain = UP_DOMAIN;
        $s = new SaeStorage();
        $s->write($up_domain , $file_name , $content);
        return $s->getUrl($up_domain ,$file_name);
    } else {
        $root = 'data/';
        if (!file_exists($root)) {
            mkdir($root);
        }
        $dst_root = $root .'upload/';
        if (!file_exists($dst_root)) {
            mkdir($dst_root);
        }
        $year_month_folder = date('Ym');
        $path = $year_month_folder;
        if (!file_exists($dst_root.$path)) {
            mkdir($dst_root.$path);
        }
        $date_folder = date('d');
        $path .= '/'.$date_folder;
        if (!file_exists($dst_root.$path)) {
            mkdir($dst_root.$path);
        }
        $path .= '/'.$file_name;
        file_put_contents($dst_root.$path, $content);
        return ROOT . 'data/upload/' . $path;
    }
}

function file_ext($file_name) {
    $arr = explode('.', $file_name);
    if (count($arr) < 2) {
        throw new Exception('bad file name: ' . $image['name']);
    }
    return end($arr);
}