Class yii\log\FileTarget

Inheritanceyii\log\FileTarget » yii\log\Target » yii\base\Component » yii\base\Object
Implementsyii\base\Configurable
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/log/FileTarget.php

FileTarget records log messages in a file.

The log file is specified via $logFile. If the size of the log file exceeds $maxFileSize (in kilo-bytes), a rotation will be performed, which renames the current log file by suffixing the file name with '.1'. All existing log files are moved backwards by one place, i.e., '.2' to '.3', '.1' to '.2', and so on. The property $maxLogFiles specifies how many history files to keep.

Public Properties

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PropertyTypeDescriptionDefined By
$behaviors yii\base\Behavior[] List of behaviors attached to this component yii\base\Component
$categories array List of message categories that this target is interested in. yii\log\Target
$dirMode integer The permission to be set for newly created directories. yii\log\FileTarget
$enableRotation boolean Whether log files should be rotated when they reach a certain maximum size. yii\log\FileTarget
$enabled boolean Whether to enable this log target. yii\log\Target
$except array List of message categories that this target is NOT interested in. yii\log\Target
$exportInterval integer How many messages should be accumulated before they are exported. yii\log\Target
$fileMode integer The permission to be set for newly created log files. yii\log\FileTarget
$levels integer The message levels that this target is interested in. yii\log\Target
$logFile string Log file path or path alias. yii\log\FileTarget
$logVars array List of the PHP predefined variables that should be logged in a message. yii\log\Target
$maxFileSize integer Maximum log file size, in kilo-bytes. yii\log\FileTarget
$maxLogFiles integer Number of log files used for rotation. yii\log\FileTarget
$messages array The messages that are retrieved from the logger so far by this log target. yii\log\Target
$prefix callable A PHP callable that returns a string to be prefixed to every exported message. yii\log\Target
$rotateByCopy boolean Whether to rotate log files by copy and truncate in contrast to rotation by renaming files. yii\log\FileTarget

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\Object
__clone() This method is called after the object is created by cloning an existing one. yii\base\Component
__construct() Constructor. yii\base\Object
__get() Returns the value of an object property. yii\base\Object
__isset() Checks if a property is set, i.e. defined and not null. yii\base\Object
__set() Sets value of an object property. yii\base\Object
__unset() Sets an object property to null. yii\base\Object
attachBehavior() Attaches a behavior to this component. yii\base\Component
attachBehaviors() Attaches a list of behaviors to the component. yii\base\Component
behaviors() Returns a list of behaviors that this component should behave as. yii\base\Component
canGetProperty() Returns a value indicating whether a property can be read. yii\base\Object
canSetProperty() Returns a value indicating whether a property can be set. yii\base\Object
className() Returns the fully qualified name of this class. yii\base\Object
collect() Processes the given log messages. yii\log\Target
detachBehavior() Detaches a behavior from the component. yii\base\Component
detachBehaviors() Detaches all behaviors from the component. yii\base\Component
ensureBehaviors() Makes sure that the behaviors declared in behaviors() are attached to this component. yii\base\Component
export() Writes log messages to a file. yii\log\FileTarget
filterMessages() Filters the given messages according to their categories and levels. yii\log\Target
formatMessage() Formats a log message for display as a string. yii\log\Target
getBehavior() Returns the named behavior object. yii\base\Component
getBehaviors() Returns all behaviors attached to this component. yii\base\Component
getLevels() yii\log\Target
getMessagePrefix() Returns a string to be prefixed to the given message. yii\log\Target
hasEventHandlers() Returns a value indicating whether there is any handler attached to the named event. yii\base\Component
hasMethod() Returns a value indicating whether a method is defined. yii\base\Object
hasProperty() Returns a value indicating whether a property is defined. yii\base\Object
init() Initializes the route. yii\log\FileTarget
off() Detaches an existing event handler from this component. yii\base\Component
on() Attaches an event handler to an event. yii\base\Component
setLevels() Sets the message levels that this target is interested in. yii\log\Target
trigger() Triggers an event. yii\base\Component

Protected Methods

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MethodDescriptionDefined By
getContextMessage() Generates the context information to be logged. yii\log\Target
rotateFiles() Rotates log files. yii\log\FileTarget

Property Details

$dirMode public property

The permission to be set for newly created directories. This value will be used by PHP chmod() function. No umask will be applied. Defaults to 0775, meaning the directory is read-writable by owner and group, but read-only for other users.

public integer $dirMode 0775
$enableRotation public property (available since version 2.0.3)

Whether log files should be rotated when they reach a certain maximum size. Log rotation is enabled by default. This property allows you to disable it, when you have configured an external tools for log rotation on your server.

public boolean $enableRotation true
$fileMode public property

The permission to be set for newly created log files. This value will be used by PHP chmod() function. No umask will be applied. If not set, the permission will be determined by the current environment.

public integer $fileMode null
$logFile public property

Log file path or path alias. If not set, it will use the "@runtime/logs/app.log" file. The directory containing the log files will be automatically created if not existing.

public string $logFile null
$maxFileSize public property

Maximum log file size, in kilo-bytes. Defaults to 10240, meaning 10MB.

public integer $maxFileSize 10240
$maxLogFiles public property

Number of log files used for rotation. Defaults to 5.

public integer $maxLogFiles 5
$rotateByCopy public property

Whether to rotate log files by copy and truncate in contrast to rotation by renaming files. Defaults to true to be more compatible with log tailers and is windows systems which do not play well with rename on open files. Rotation by renaming however is a bit faster.

The problem with windows systems where the rename() function does not work with files that are opened by some process is described in a comment by Martin Pelletier in the PHP documentation. By setting rotateByCopy to true you can work around this problem.

public boolean $rotateByCopy true

Method Details

export() public method

Writes log messages to a file.

public void export ( )
throws yii\base\InvalidConfigException

if unable to open the log file for writing

init() public method

Initializes the route.

This method is invoked after the route is created by the route manager.

public void init ( )
rotateFiles() protected method

Rotates log files.

protected void rotateFiles ( )