function MessageTrait::trimAndValidateHeaderValues

Trims whitespace from the header values.

Spaces and tabs ought to be excluded by parsers when extracting the field value from a header field.

header-field = field-name ":" OWS field-value OWS OWS = *( SP / HTAB )

Parameters

mixed[] $values Header values:

Return value

string[] Trimmed header values

File

vendor/guzzlehttp/psr7/src/MessageTrait.php, line 198

Class

MessageTrait: Trait implementing functionality common to requests and responses.

Namespace

GuzzleHttp\Psr7

Code

private function trimAndValidateHeaderValues(array $values) : array {
    return array_map(function ($value) {
        if (!is_scalar($value) && null !== $value) {
            throw new \InvalidArgumentException(sprintf('Header value must be scalar or null but %s provided.', is_object($value) ? get_class($value) : gettype($value)));
        }
        $trimmed = trim((string) $value, " \t");
        $this->assertValue($trimmed);
        return $trimmed;
    }, array_values($values));
}