Fetches values needed for testing stored on mapping

@param string $key (Unique) Identifier key on the array

@return mixed|null Mapped value or null if not found
966751
protected function getValuesFromKeyMap( $key )
    {
        if ( empty( $key ) || empty( $this->keyMap[$key] ) )
        {
            return null;
        }

        return $this->keyMap[$key];
    }
417425
protected function itemAt($key)
    {
        if (isset($this->_data[$key])) {
            return $this->_data[$key];
        }
        return null;
    }
562623
public function value($key)
    {
        return (array_key_exists($key, $this->tags)) ? $this->tags[$key] : null;
    }
1048481
public function get($key)
    {
        if (!$this->has($key)) {
            return null;
        }

        $file = $this->directory . substr(md5($this->prefix() . $key), 0, 10) . '.dat';

        return unserialize(file_get_contents($file));
    }
1015197
public static function pull($key)
    {
        if (isset($_SESSION[self::$prefix . $key])) {
            $value = $_SESSION[self::$prefix . $key];
            unset($_SESSION[self::$prefix . $key]);

            return $value;
        }

        return null;
    }
1069236
private function getValue ($key)
    {
        return isset($this->configuration[$key])
            ? $this->configuration[$key]
            : null;
    }
1145722
public function get($key)
    {
        return array_key_exists($key, $this->vars) ? $this->vars[$key] : null;
    }
1127671
public function grabValueFromApc($key)
    {
        $value = $this->fetch($key);
        $this->debugSection('Value', $value);

        return $value;
    }
966020
public function get($key)
    {
        if (!$this->isEnabled()) {
            return null;
        }

        return unserialize(eaccelerator_get($this->prefix() . $key));
    }
149279
public function getParamValue($key)
    {
        $value = null;
        if (is_array($param = $this->getParam($key))) {
            $value = $param['value'];
        }

        return $value;
    }
294321
public function get($key)
    {
        if (isset($this->_values[$key])) {
            return $this->_values[$key];
        }

        return null;
    }
1221067
public function get($key)
    {
        $filename = $this->getKeyCode($key);

        if ($this->fileExists($filename)) {
            $value = $this->read($filename);
        } else {
            return null;
        }

        return json_decode($value, true);
    }
1322257
public function get(string $key)
    {
        $hash =  self::findFirst([
            'conditions' => "{$this->settingsKey} = ?0 and key = ?1",
            'bind' => [$this->getSettingsKey(), $key]
        ]);

        if ($hash) {
            return $hash->value;
        }

        return null;
    }
1302005
public function hmget($key) {

        $set     = $this->getKey($collection, $key, []);
        $fields  = func_get_args();
        $values  = [];

        for ($i=1; $i<count($fields); $i++){
            $field = $fields[$i];
            $values[] = isset($set[$field]) ? $set[$field]:null;
        }

        return $values;
    }
316772
public function get($key)
    {
        $item = $this->pool->getItem($key);
        if ($item->isMiss() === false) {
            return $this->serializer->deserialize($item->get());
        } else {
            return null;
        }
    }
1194862
public function get($key)
    {
        if( isset($this->values[$key]) ) {
            return $this->values[$key];
        } else {
            return null;
        }
    }
221173
public function get($key)
    {
        if (!$this->isEnabled()) {
            return null;
        }

        if (xcache_isset($this->prefix() . $key)) {
            return unserialize(xcache_get($this->prefix() . $key));
        } else {
            return null;
        }
    }