wp post meta add Add a meta field. wp post meta add <id> <key> [<value>] [--format=<format>] Options <id>The ID of the object.<key>The name of the meta field to create.[<value>]The value of the meta field. If omitted, the value is read from STDIN.[--format=<format>]The serialization format for the value. [Default: plaintext]Options:plaintextjson Related Commandspost-metapost-meta-getpost-meta-listpost-meta-patchpost-meta-pluck
The command line interface for WordPress