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CHelpCommand

Package system.console
Inheritance class CHelpCommand » CConsoleCommand » CComponent
Since 1.0
Source Code framework/console/CHelpCommand.php
CHelpCommand represents a console help command.

CHelpCommand displays the available command list or the help instructions about a specific command.

To use this command, enter the following on the command line: 
php path/to/entry_script.php help [command name]
In the above, if the command name is not provided, it will display all available commands.

Public Properties

Hide inherited properties

PropertyTypeDescriptionDefined By
commandRunner CConsoleCommandRunner the command runner instance CConsoleCommand
defaultAction string the name of the default action. CConsoleCommand
help string Provides the command description. CHelpCommand
name string the command name. CConsoleCommand
optionHelp array Provides the command option help information. CConsoleCommand

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. CComponent
__construct() Constructor. CConsoleCommand
__get() Returns a property value, an event handler list or a behavior based on its name. CComponent
__isset() Checks if a property value is null. CComponent
__set() Sets value of a component property. CComponent
__unset() Sets a component property to be null. CComponent
asa() Returns the named behavior object. CComponent
attachBehavior() Attaches a behavior to this component. CComponent
attachBehaviors() Attaches a list of behaviors to the component. CComponent
attachEventHandler() Attaches an event handler to an event. CComponent
behaviors() Returns a list of behaviors that this command should behave as. CConsoleCommand
buildFileList() Builds the file list of a directory. CConsoleCommand
canGetProperty() Determines whether a property can be read. CComponent
canSetProperty() Determines whether a property can be set. CComponent
confirm() Asks user to confirm by typing y or n. CConsoleCommand
copyFiles() Copies a list of files from one place to another. CConsoleCommand
detachBehavior() Detaches a behavior from the component. CComponent
detachBehaviors() Detaches all behaviors from the component. CComponent
detachEventHandler() Detaches an existing event handler. CComponent
disableBehavior() Disables an attached behavior. CComponent
disableBehaviors() Disables all behaviors attached to this component. CComponent
enableBehavior() Enables an attached behavior. CComponent
enableBehaviors() Enables all behaviors attached to this component. CComponent
ensureDirectory() Creates all parent directories if they do not exist. CConsoleCommand
evaluateExpression() Evaluates a PHP expression or callback under the context of this component. CComponent
getCommandRunner() Returns the command runner instance CConsoleCommand
getEventHandlers() Returns the list of attached event handlers for an event. CComponent
getHelp() Provides the command description. CHelpCommand
getName() Returns the command name. CConsoleCommand
getOptionHelp() Provides the command option help information. CConsoleCommand
hasEvent() Determines whether an event is defined. CComponent
hasEventHandler() Checks whether the named event has attached handlers. CComponent
hasProperty() Determines whether a property is defined. CComponent
init() Initializes the command object. CConsoleCommand
onAfterAction() This event is raised after an action finishes execution. CConsoleCommand
onBeforeAction() This event is raised before an action is to be executed. CConsoleCommand
pluralize() Converts a word to its plural form. CConsoleCommand
prompt() Reads input via the readline PHP extension if that's available, or fgets() if readline is not installed. CConsoleCommand
raiseEvent() Raises an event. CComponent
renderFile() Renders a view file. CConsoleCommand
run() Execute the action. CHelpCommand
usageError() Displays a usage error. CConsoleCommand

Protected Methods

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MethodDescriptionDefined By
afterAction() This method is invoked right after an action finishes execution. CConsoleCommand
beforeAction() This method is invoked right before an action is to be executed. CConsoleCommand
resolveRequest() Parses the command line arguments and determines which action to perform. CConsoleCommand

Events

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EventDescriptionDefined By
onBeforeAction This event is raised before an action is to be executed. CConsoleCommand
onAfterAction This event is raised after an action finishes execution. CConsoleCommand

Property Details

help property read-only
public string getHelp()

Provides the command description.

Method Details

getHelp() method
public string getHelp()
{return} string the command description.
Source Code: framework/console/CHelpCommand.php#72 (show)
public function getHelp()
{
    return parent::getHelp().' [command-name]';
}

Provides the command description.

run() method
public integer run(array $args)
$args array command line parameters specific for this command
{return} integer non zero application exit code after printing help
Source Code: framework/console/CHelpCommand.php#37 (show)
public function run($args)
{
    $runner=$this->getCommandRunner();
    $commands=$runner->commands;
    if(isset($args[0]))
        $name=strtolower($args[0]);
    if(!isset($args[0]) || !isset($commands[$name]))
    {
        if(!empty($commands))
        {
            echo "Yii command runner (based on Yii v".Yii::getVersion().")\n";
            echo "Usage: ".$runner->getScriptName()." <command-name> [parameters...]\n";
            echo "\nThe following commands are available:\n";
            $commandNames=array_keys($commands);
            sort($commandNames);
            echo ' - '.implode("\n - ",$commandNames);
            echo "\n\nTo see individual command help, use the following:\n";
            echo "   ".$runner->getScriptName()." help <command-name>\n";
        }
        else
        {
            echo "No available commands.\n";
            echo "Please define them under the following directory:\n";
            echo "\t".Yii::app()->getCommandPath()."\n";
        }
    }
    else
        echo $runner->createCommand($name)->getHelp();
    return 1;
}

Execute the action.