@param string $key

@return bool
485608
public function hasHeader($key)
    {
        foreach ($this->responseHeaders as $k => $v) {
            if (\strtoupper($key) === \strtoupper($k)) {
                return true;
            }
        }

        return false;
    }
1075553
public function has($key): bool
    {
        $this->checkKey($key);
        return (bool) $this->getRedis()->keys($this->filterKey($key));
    }
1290104
public function hasStored(string $key)
    {
        if (isset($this->store[$key])) {
            return true;
        }

        if (isset($this->aliases[$key])) {
            return isset($this->store[$this->aliases[$key]]);
        }

        return false;
    }
76220
public function has($key)
	{
		return $this->engine->get($this->id($key)) !== false || $this->engine->getResultCode() != \Memcached::RES_NOTFOUND;
	}
673091
public function has($key)
	{
		$key = $this->id($key);

		if (eaccelerator_get($key) !== null)
		{
			return false;
		}

		return true;
	}
233023
public function has( $key = null )
	{
		$keys = is_array( $key ) ? $key : func_get_args();

		foreach ( $keys as $key )
		{
			if ( $this->first( $key ) === '' )
			{
				return false;
			}
		}

		return true;
	}
467384
public function has($key)
    {
        $value = $this->get($key);

        return ! is_null($value) && $value !== false;
    }
433328
public function has(string $key): bool
    {
        $key = $this->prepareKey($key);
        return Arr::has($this->properties, $key);
    }
1259685
public function has($key): bool
    {
        return ArrayUtility::dotRead($this->data, $this->getNormalizedKey($key)) !== null;
    }
1041803
public function has($key)
    {
        $keys = (func_num_args() > 1) ? func_get_args() : (array) $key;

        foreach ($keys as $key) {
            if(!array_key_exists($key, $this->_data))
                return false;
        }

        return true;
    }
860230
public function has($key)
    {
        if (is_null($key)) {
            return $this->any();
        }

        $keys = is_array($key) ? $key : func_get_args();

        foreach ($keys as $key) {
            if ($this->first($key) === '') {
                return false;
            }
        }

        return true;
    }
1181595
public function has($key) {
        if (is_array($key)) {
            $key = $key['key'];
        }
        return isset($this->store[$key]);
    }
220977
public function containsKey($key)
    {
        if (!$this->enabled)
            return false;

        $has_key = array_key_exists($this->key($key), $this->cache);

        // $this->Logger->debug("Cache contains {$key}? " . (($has_key) ? 'TRUE' : 'FALSE'));

        return $has_key;
    }
720766
public function has($key)
    {
        // For performance, we can use isset,
        // but it will not match if value == 0
        return isset($this->values[$key]) || array_key_exists($key, $this->values);
    }
600816
public function has(string $key)
    {
        if (array_key_exists($key, $this->input)) {
            return true;
        }

        try {
            $this->find($this->input, $key);
            return true;
        } catch (\Exception $e) {
            return false;
        }
    }
165895
public function has($key)
    {
        $keys = is_array($key) ? $key : func_get_args();

        $input = $this->all();

        foreach ($keys as $value) {
            if (! Arr::has($input, $value)) {
                return false;
            }
        }

        return true;
    }
441548
public function has(string $key): bool
    {
        if (!array_key_exists($key, $this->data)) {
            return false;
        }

        return true;
    }