function MessageTrait::withAddedHeader

File

vendor/guzzlehttp/psr7/src/MessageTrait.php, line 88

Class

MessageTrait: Trait implementing functionality common to requests and responses.

Namespace

Code

public function withAddedHeader($header, $value) : MessageInterface {
    $this->assertHeader($header);
    $value = $this->normalizeHeaderValue($value);
    $normalized = strtolower($header);
    $new = clone $this;
    if (isset($new->headerNames[$normalized])) {
        $header = $this->headerNames[$normalized];
        $new->headers[$header] = array_merge($this->headers[$header], $value);
    }
    else {
        $new->headerNames[$normalized] = $header;
        $new->headers[$header] = $value;
    }
    return $new;
}