我一直在使用托管在Google App Engine平台上的PHP Codeigniter Framework。
据我们所知,由于安全原因,Google不允许像普通平台一样上传图片。所以我使用谷歌云存储来上传图像,我已经通过在Codeigniter中创建一个隔膜库成功实现了它。
我遇到的问题是如何在foreach或for循环中为它们提供服务。如果我调用一次图像而不是网页上显示的图像,但如果我尝试在循环中实现该代码,则当循环计数器进入第二次计数时它会停止。下面是我创建并在循环中调用的库和Helper函数。
库:
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
use google\appengine\api\cloud_storage\CloudStorageTools;
class Display {
var $config = Array();
var $image_url = '';
var $folder = '';
var $image = '';
var $size = 400;
var $crop = true;
public function __construct(){
$bucket = CloudStorageTools::getDefaultGoogleStorageBucketName();
$this->image_url = 'gs://' . $bucket . '/uploads/';
}
public function image_url(){
$path = $this->image_url.$this->folder.'/';
$this->image_url = ( !empty($this->image) && is_file( $path . $this->image)) ?$path .$this->image:'noimage_thb.png' ;
$image_url = @CloudStorageTools::getImageServingUrl($this->image_url);
/*printArray($this->image_url,1);*/
if($image_url == ''){
$image_url = '';
}
return $image_url;
}
}
?>
辅助功能:
if (!function_exists('image_url')) {
function image_url($folderName,$image, $size, $crop = false)
{
$CI =& get_instance();
// we first load the upload library
$CI->load->library('display');
$CI->display->folder = $folderName;
$CI->display->image = $image;
$CI->display->size = $size;
$CI->display->crop = $crop;
$url = $CI->display->image_url();
return $url;
}
}
查看文件代码(循环):
<div class="fotorama" data-allowfullscreen="true" data-nav="thumbs">
<?php
$images = explode(",", $dbdata['beach_photo']);
for ($img_no = 0; $img_no < count($images); $img_no++) {
$imageUrl = image_url('venue', $images[$img_no], '400');
?>
<img src="<?php echo $imageUrl; ?>" class="img-responsive"/>
<?php } ?>
</div>
如果有人遇到同样的问题,请留下您的答案。
答案 0 :(得分:2)
由于我没有从任何人那里得到任何解决方案,所以我逐步挖掘了我的代码并找到了解决方案。 由于在循环中调用基本辅助函数时生成的路径不正确而导致错误。所以这里是可以使用的更新版本。把我的答案放在这里,因为我没有在OOP概念或图书馆形式中找到Google Cloud示例。
图书馆:(Display.php)
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
use google\appengine\api\cloud_storage\CloudStorageTools;
class Display
{
public $config = Array();
public $image_url = '';
public $folder = '';
public $image = '';
public $size = 400;
public $path = '';
public $crop = true;
public $bucket = '';
/**
* Constructor
*
* @access public
*/
public function __construct($props = array())
{
$this->bucket = CloudStorageTools::getDefaultGoogleStorageBucketName();
if (count($props) > 0) {
$this->initialize($props);
}
log_message('debug', "Upload Class Initialized");
}
// --------------------------------------------------------------------
/**
* Initialize preferences
*
* @param array
* @return void
*/
public function initialize($config = array())
{
$defaults = array(
'folder' => 0,
'image' => 0,
'size' => 600,
'crop' => false
);
foreach ($defaults as $key => $val) {
if (isset($config[$key])) {
$method = 'set_' . $key;
if (method_exists($this, $method)) {
$this->$method($config[$key]);
} else {
$this->$key = $config[$key];
}
} else {
$this->$key = $val;
}
}
$this->image_url = 'gs://' . $this->bucket . '/uploads/';
}
public function set_image($image)
{
$this->image = $image;
}
public function set_folder($folder)
{
$this->folder = $folder;
}
public function set_crop($n)
{
$this->crop = $n;
}
public function set_size($n)
{
$this->size = (int) $n;
}
public function image_url()
{
$this->path = $this->image_url . $this->folder . '/';
/*printArray($this->size.' AND '.$this->crop,1);*/
$this->image_url = (!empty($this->image) && is_file($this->path . $this->image)) ? $this->path . $this->image : $this->path . 'noimage_thb.png';
$image_url = @CloudStorageTools::getImageServingUrl($this->image_url, ['size' => (int) $this->size, 'crop' => $this->crop]);
if ($image_url == '') {
$image_url = '';
}
return $image_url;
}
public function delete_image()
{
$this->path = $this->image_url . $this->folder . '/';
/*printArray($this->size.' AND '.$this->crop,1);*/
$this->image_url = (!empty($this->image) && is_file($this->path . $this->image)) ? $this->path . $this->image : $this->path . 'noimage_thb.png';
$image_url = @CloudStorageTools::deleteImageServingUrl($this->image_url);
return $image_url;
}
}
?>
帮助者:
if (!function_exists('image_url')) {
function image_url($folderName, $image, $size, $crop = false)
{
$CI =& get_instance();
// we first load the upload library
$CI->load->library('display');
$config['folder'] = $folderName;
$config['size'] = $size;
$config['crop'] = $crop;
$config['image'] = $image;
$CI->display->initialize($config);
$url = $CI->display->image_url($image);
return $url;
}
}
查看:(如何使用)
<?php
$images = explode(",", $dbdata['beach_photo']);
for ($img_no = 0; $img_no < count($images); $img_no++) {
$imageUrl = image_url('venue', $images[$img_no], '1200', true);
?>
<img src="<?php echo $imageUrl; ?>" class="img-responsive"/>
<?php
}
?>
希望这篇文章可能有助于Google Developers。有关我的更多信息,请访问www.iamabhishek.com
答案 1 :(得分:0)
我发现了问题,问题出现在我的库中:
$path = $this->image_url.$this->folder.'/';
$this->image_url =
( !empty($this->image) && is_file($path .$this->image)) ?$path.$this->image:'noimage_thb.png' ;
每当循环执行并创建图像路径时,第一次创建的图像路径是正确的,但是在路径make生成时首次索引后,它不会替换先前生成的路径而不是附加旧的路径变量。
我会很快发布适当的解决方案。随着新版本的库。