@param string $key

@return bool
430857
public function delete($key)
    {
        if ($this->has($key)) {
            unset($this->values[$key]);

            return true;
        }

        return false;
    }
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, $this->values);
    }
551201
public function hasProperty($key)
    {
        $properties = $this->getProperties();

        foreach ($properties as $property) {
            if ($property['key'] === $key && $property['value'] !== '') {
                return true;
            }
        }

        return false;
    }
636374
public function has($key)
    {
        return (isset($this->headers[$this->normalizeKey($key)])) ? true : false;
    }
1229019
public static function has(string $key):bool
    {
        return self::getViewHelper()->getView()->getValue($key) !== null;
    }
732119
public function has($key)
    {
        $value = $this->get($key);
        if ($value === false) {
            return false;
        }

        return true;
    }
635966
public function has($key)
    {
        return isset($this->data[$key]) && is_array($this->data[$key]);
    }
1259685
public function has($key): bool
    {
        return ArrayUtility::dotRead($this->data, $this->getNormalizedKey($key)) !== null;
    }
375673
public function has($key): bool
    {
        return $this->exists($key) && null !== $this->attributes[$key];
    }
1075553
public function has($key): bool
    {
        $this->checkKey($key);
        return (bool) $this->getRedis()->keys($this->filterKey($key));
    }
1249582
public function is($key) {
        $code = $this->current()->getCode();

        return ($code === $key || $this->canonicalize($code) === $key);
    }
955785
public function containsKey(string $key): bool
    {
        if (isset($this->orgData[$key])) {
            return ! isset($this->removeAttributes[$key]);
        } else {
            return isset($this->addAttributes[$key]);
        }
    }
673091
public function has($key)
	{
		$key = $this->id($key);

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

		return true;
	}
727280
public function has(string $key): bool
    {
        return isset($this->data[$key]) || array_key_exists($key, $this->data);
    }
1316570
public function has($key) {
		$key = $this->extractKey($key);
		return isset($this->collection[$key]);
	}
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;
	}
441548
public function has(string $key): bool
    {
        if (!array_key_exists($key, $this->data)) {
            return false;
        }

        return true;
    }