我收到此错误：
致命错误：在第 30 行的 /var/www/html/rackspace/vendor/rackspace/php-opencloud/lib/OpenCloud/Common/Log/Logger.php 中找不到类 'Psr\Log\AbstractLogger'
这是我的 Logger.php 文件
<?php
/**
* Copyright 2012-2014 Rackspace US, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace OpenCloud\Common\Log;
use OpenCloud\Common\Exceptions\LoggingException;
use Psr\Log\AbstractLogger;
use Psr\Log\LogLevel;
/**
* Basic logger for OpenCloud which extends FIG's PSR-3 standard logger.
*
* @link https://github.com/php-fig/log
*/
class Logger extends AbstractLogger
{
/**
* Is this debug class enabled or not?
*
* @var bool
*/
private $enabled;
/**
* These are the levels which will always be outputted - regardless of
* user-imposed settings.
*
* @var array
*/
private $urgentLevels = array(
LogLevel::EMERGENCY,
LogLevel::ALERT,
LogLevel::CRITICAL
);
/**
* Logging options.
*
* @var array
*/
private $options = array(
'outputToFile' => false,
'logFile' => null,
'dateFormat' => 'd/m/y H:I',
'delimeter' => ' - '
);
public function __construct($enabled = false)
{
$this->enabled = $enabled;
}
public static function newInstance()
{
return new static();
}
/**
* Determines whether a log level needs to be outputted.
*
* @param string $logLevel
* @return bool
*/
private function outputIsUrgent($logLevel)
{
return in_array($logLevel, $this->urgentLevels);
}
/**
* Interpolates context values into the message placeholders.
*
* @param string $message
* @param array $context
* @return type
*/
private function interpolate($message, array $context = array())
{
// build a replacement array with braces around the context keys
$replace = array();
foreach ($context as $key => $val) {
$replace['{' . $key . '}'] = $val;
}
// interpolate replacement values into the message and return
return strtr($message, $replace);
}
/**
* Enable or disable the debug class.
*
* @param bool $enabled
* @return self
*/
public function setEnabled($enabled)
{
$this->enabled = $enabled;
return $this;
}
/**
* Is the debug class enabled?
*
* @return bool
*/
public function isEnabled()
{
return $this->enabled === true;
}
/**
* Set an array of options.
*
* @param array $options
*/
public function setOptions(array $options = array())
{
foreach ($options as $key => $value) {
$this->setOption($key, $value);
}
return $this;
}
/**
* Get all options.
*
* @return array
*/
public function getOptions()
{
return $this->options;
}
/**
* Set an individual option.
*
* @param string $key
* @param string $value
*/
public function setOption($key, $value)
{
if ($this->optionExists($key)) {
$this->options[$key] = $value;
return $this;
}
}
/**
* Get an individual option.
*
* @param string $key
* @return string|null
*/
public function getOption($key)
{
if ($this->optionExists($key)) {
return $this->options[$key];
}
}
/**
* Check whether an individual option exists.
*
* @param string $key
* @return bool
*/
private function optionExists($key)
{
return array_key_exists($key, $this->getOptions());
}
/**
* Outputs a log message if necessary.
*
* @param string $logLevel
* @param string $message
* @param string $context
*/
public function log($level, $message, array $context = array())
{
if ($this->outputIsUrgent($level) || $this->isEnabled()) {
$this->dispatch($message, $context);
}
}
/**
* Used to format the line outputted in the log file.
*
* @param string $string
* @return string
*/
private function formatFileLine($string)
{
$format = $this->getOption('dateFormat') . $this->getOption('delimeter');
return date($format) . $string;
}
/**
* Dispatch a log output message.
*
* @param string $message
* @param array $context
* @throws LoggingException
*/
private function dispatch($message, $context)
{
$output = $this->interpolate($message, $context) . PHP_EOL;
if ($this->getOption('outputToFile') === true) {
$file = $this->getOption('logFile');
if (!is_writable($file)) {
throw new LoggingException(
'The log file either does not exist or is not writeable'
);
}
// Output to file
file_put_contents($file, $this->formatFileLine($output), FILE_APPEND);
} else {
echo $output;
}
}
/**
* Helper method, use PSR-3 warning function for deprecation warnings
* @see http://www.php-fig.org/psr/psr-3/
*/
public static function deprecated($method, $new)
{
return sprintf('The %s method is deprecated, please use %s instead', $method, $new);
}
}
这是我在 Logger.php 文件的第 30 行找到的
class Logger extends AbstractLogger
我已经安装了Psr，/var/www/html/rackspace/vendor/rackspace/php-opencloud/lib/OpenCloud/Common/Log但我确定这不是正确的地方。
有什么建议么？