Class ConsoleIo
A wrapper around the various IO operations shell tasks need to do.
Packages up the stdout, stderr, and stdin streams providing a simple consistent interface for shells to use. This class also makes mocking streams easy to do in unit tests.
Constants
Property Summary
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$_err protected
Cake\Console\ConsoleOutputThe error stream
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$_in protected
Cake\Console\ConsoleInputThe input stream
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$_lastWritten protected
intThe number of bytes last written to the output stream used when overwriting the previous message.
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$_level protected
intThe current output level.
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$_out protected
Cake\Console\ConsoleOutputThe output stream
Method Summary
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__construct() public
Constructor
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_getInput() protected
Prompts the user for input, and returns it.
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ask() public
Prompts the user for input, and returns it.
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askChoice() public
Prompts the user for input based on a list of options, and returns it.
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err() public
Outputs a single or multiple error messages to stderr. If no parameters are passed outputs just a newline.
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hr() public
Outputs a series of minus characters to the standard output, acts as a visual separator.
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level() public
Get/set the current output level.
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nl() public
Returns a single or multiple linefeeds sequences.
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out() public
Outputs a single or multiple messages to stdout. If no parameters are passed outputs just a newline.
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outputAs() public
Change the output mode of the stdout stream
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overwrite() public
Overwrite some already output text.
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quiet() public
Output at all levels.
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setLoggers() public
Connects or disconnects the loggers to the console output.
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styles() public
Add a new output style or get defined styles.
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verbose() public
Output at the verbose level.
Method Detail
__construct() ¶ public
__construct(Cake\Console\ConsoleOutput|null $out = null, Cake\Console\ConsoleOutput|null $err = null, Cake\Console\ConsoleInput|null $in = null)Constructor
Parameters
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Cake\Console\ConsoleOutput|null$out optional A ConsoleOutput object for stdout.
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Cake\Console\ConsoleOutput|null$err optional A ConsoleOutput object for stderr.
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Cake\Console\ConsoleInput|null$in optional A ConsoleInput object for stdin.
_getInput() ¶ protected
_getInput(string $prompt, string|null $options, string|null $default): stringPrompts the user for input, and returns it.
Parameters
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string$prompt Prompt text.
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string|null$options String of options. Pass null to omit.
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string|null$default Default input value. Pass null to omit.
Returns
stringask() ¶ public
ask(string $prompt, string|null $default = null): mixedPrompts the user for input, and returns it.
Parameters
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string$prompt Prompt text.
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string|null$default optional Default input value.
Returns
mixedaskChoice() ¶ public
askChoice(string $prompt, string|array $options, string|null $default = null): mixedPrompts the user for input based on a list of options, and returns it.
Parameters
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string$prompt Prompt text.
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string|array$options Array or string of options.
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string|null$default optional Default input value.
Returns
mixederr() ¶ public
err(string|array $message = null, int $newlines = 1): voidOutputs a single or multiple error messages to stderr. If no parameters are passed outputs just a newline.
Parameters
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string|array$message optional A string or an array of strings to output
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int$newlines optional Number of newlines to append
Returns
voidhr() ¶ public
hr(int $newlines = 0, int $width = 79): voidOutputs a series of minus characters to the standard output, acts as a visual separator.
Parameters
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int$newlines optional Number of newlines to pre- and append
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int$width optional Width of the line, defaults to 79
Returns
voidlevel() ¶ public
level(null|int $level = null): intGet/set the current output level.
Parameters
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null|int$level optional The current output level.
Returns
intnl() ¶ public
nl(int $multiplier = 1): stringReturns a single or multiple linefeeds sequences.
Parameters
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int$multiplier optional Number of times the linefeed sequence should be repeated
Returns
stringout() ¶ public
out(string|array $message = null, int $newlines = 1, int $level = ConsoleIo::NORMAL): int|boolOutputs a single or multiple messages to stdout. If no parameters are passed outputs just a newline.
Output levels
There are 3 built-in output level. Shell::QUIET, Shell::NORMAL, Shell::VERBOSE.
The verbose and quiet output levels, map to the verbose and quiet output switches
present in most shells. Using Shell::QUIET for a message means it will always display.
While using Shell::VERBOSE means it will only display when verbose output is toggled.
Parameters
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string|array$message optional A string or an array of strings to output
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int$newlines optional Number of newlines to append
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int$level optional The message's output level, see above.
Returns
int|booloutputAs() ¶ public
outputAs(int $mode): voidChange the output mode of the stdout stream
Parameters
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int$mode The output mode.
Returns
voidSee Also
overwrite() ¶ public
overwrite(array|string $message, int $newlines = 1, int $size = null): voidOverwrite some already output text.
Useful for building progress bars, or when you want to replace text already output to the screen with new text.
Warning You cannot overwrite text that contains newlines.
Parameters
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array|string$message The message to output.
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int$newlines optional Number of newlines to append.
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int$size optional The number of bytes to overwrite. Defaults to the length of the last message output.
Returns
voidquiet() ¶ public
quiet(string|array $message, int $newlines = 1): int|boolOutput at all levels.
Parameters
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string|array$message A string or an array of strings to output
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int$newlines optional Number of newlines to append
Returns
int|boolsetLoggers() ¶ public
setLoggers(bool $enable): voidConnects or disconnects the loggers to the console output.
Used to enable or disable logging stream output to stdout and stderr
If you don't wish all log output in stdout or stderr
through Cake's Log class, call this function with $enable=false.
Parameters
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bool$enable Whether you want loggers on or off.
Returns
voidstyles() ¶ public
styles(string $style = null, array|bool|null $definition = null): mixedAdd a new output style or get defined styles.
Parameters
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string$style optional The style to get or create.
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array|bool|null$definition optional The array definition of the style to change or create a style or false to remove a style.
Returns
mixedSee Also
verbose() ¶ public
verbose(string|array $message, int $newlines = 1): int|boolOutput at the verbose level.
Parameters
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string|array$message A string or an array of strings to output
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int$newlines optional Number of newlines to append
Returns
int|boolProperty Detail
$_lastWritten ¶ protected
The number of bytes last written to the output stream used when overwriting the previous message.
Type
int