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Summery Summery
Retrieves the given header from the request.
Syntax Syntax
Description Description
If the header has multiple values, they will be concatenated with a comma as per the HTTP specification. Be aware that some non-compliant headers (notably cookie headers) cannot be joined this way.
Parameters Parameters
- $key
-
(Required) Header name, will be canonicalized to lowercase.
Return Return
(string|null) String value if set, null otherwise.
Source Source
File: wp-includes/rest-api/class-wp-rest-request.php
public function get_header( $key ) {
$key = $this->canonicalize_header_name( $key );
if ( ! isset( $this->headers[ $key ] ) ) {
return null;
}
return implode( ',', $this->headers[ $key ] );
}
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Changelog Changelog
| Version | Description |
|---|---|
| 4.4.0 | Introduced. |