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<?php |
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|
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namespace Stripe\Util; |
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|
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/** |
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* CaseInsensitiveArray is an array-like class that ignores case for keys. |
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* |
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* It is used to store HTTP headers. Per RFC 2616, section 4.2: |
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* Each header field consists of a name followed by a colon (":") and the field value. Field names |
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* are case-insensitive. |
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* |
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* In the context of stripe-php, this is useful because the API will return headers with different |
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* case depending on whether HTTP/2 is used or not (with HTTP/2, headers are always in lowercase). |
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*/ |
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class CaseInsensitiveArray implements \ArrayAccess, \Countable, \IteratorAggregate |
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{ |
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private $container = []; |
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|
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public function __construct($initial_array = []) |
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{ |
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$this->container = \array_change_key_case($initial_array, \CASE_LOWER); |
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} |
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|
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/** |
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* @return int |
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*/ |
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#[\ReturnTypeWillChange] |
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public function count() |
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{ |
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return \count($this->container); |
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} |
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|
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/** |
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* @return \ArrayIterator |
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*/ |
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#[\ReturnTypeWillChange] |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->container); |
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} |
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|
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/** |
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* @return void |
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*/ |
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#[\ReturnTypeWillChange] |
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public function offsetSet($offset, $value) |
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{ |
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$offset = static::maybeLowercase($offset); |
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if (null === $offset) { |
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$this->container[] = $value; |
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} else { |
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$this->container[$offset] = $value; |
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} |
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} |
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|
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/** |
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* @return bool |
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*/ |
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#[\ReturnTypeWillChange] |
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public function offsetExists($offset) |
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{ |
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$offset = static::maybeLowercase($offset); |
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|
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return isset($this->container[$offset]); |
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} |
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|
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/** |
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* @return void |
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*/ |
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#[\ReturnTypeWillChange] |
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public function offsetUnset($offset) |
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{ |
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$offset = static::maybeLowercase($offset); |
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unset($this->container[$offset]); |
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} |
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|
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/** |
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* @return mixed |
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*/ |
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#[\ReturnTypeWillChange] |
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public function offsetGet($offset) |
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{ |
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$offset = static::maybeLowercase($offset); |
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|
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return isset($this->container[$offset]) ? $this->container[$offset] : null; |
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} |
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|
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private static function maybeLowercase($v) |
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{ |
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if (\is_string($v)) { |
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return \strtolower($v); |
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} |
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|
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return $v; |
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} |
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} |
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|
