WP_CLI::xxxx outputs like WP_CLI::success09.12.25

1. WP_CLI::line( $message )
Prints a single line of text.

PHP
WP_CLI::line( 'Just a line of output.' );
2. WP_CLI::success( $message )
Prints a success message in green.

PHP
WP_CLI::success( 'Operation completed successfully.' );
3. WP_CLI::warning( $message )
Prints a warning message in yellow.

PHP
WP_CLI::warning( 'This is a warning.' );
4. WP_CLI::error( $message, $exit_code = 1 )
Prints an error message in red and exits with a status code.

PHP
WP_CLI::error( 'Something went wrong!' );
5. WP_CLI::log( $message )
Prints a message (alias for line() but will be displayed only if not in quiet mode).

PHP
WP_CLI::log( 'Logging a normal message.' );
6. WP_CLI::halt( $exit_code = 1 )
Stops the execution, optionally with an exit code (no message).

PHP
WP_CLI::halt( 2 );
7. WP_CLI::confirm( $message, $assoc_args = array() )
Prompts user for confirmation before proceeding.

PHP
WP_CLI::confirm( 'Are you sure you want to do this?' );
8. WP_CLI::prompt( $question, $options = false )
Prompts user for input.

PHP
$name = WP_CLI::prompt( 'What is your name?' );
9. WP_CLI::launch( $command, $exit_on_error = true, $return_detailed = false )
Executes a shell command.

PHP
WP_CLI::launch( 'ls -la' );
10. WP_CLI::add_command( $name, $callable, $args = array() )
Registers a custom WP-CLI command.

PHP
WP_CLI::add_command( 'hello', 'hello_callback' );
11. WP_CLI::error_multi_line( $messages, $exit_code = 1 )
Prints a multi-line error message and exits.

PHP
WP_CLI::error_multi_line( [ 'First error.', 'Second error.' ] );
The most relevant output methods for CLI scripts
Most commonly used for WP-CLI commands are:

WP_CLI::line
WP_CLI::log
WP_CLI::success
WP_CLI::warning
WP_CLI::error
WP_CLI::error_multi_line

https://wp-cli.org/

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WP_CLI::xxxx outputs like WP_CLI::success09.12.25

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