Class Value

A value represents any type of data and offers data conversion.

Core\Object implements Core\Chainable

Core\Set implements Core\Accessor

Core\Value implements Core\Comparable, Core\Equality, Core\Identity

Direct known subclasses

Core\Env_File, Core\Env_FileList, Core\Filter_Value

Namespace: Core
Package: Core
Since: 3.1
Requires: PHP 5.3
Version: 1.0
Located at Value.inc.php

Methods summary

`public`	# `__construct( mixed $value, callable $onSetCallback = null )` Initialises a new value instance. Initialises a new value instance. Parameters `$value` Variable to initialise instance with. `$onSetCallback` Callback to invoke to perform actual value change on `Core\Value::set()` calls. Since 3.1
`public`	# `__clone( )` Initialises a clone of the current instance. Initialises a clone of the current instance. If the stored value is an object, the value is cloned. Since 3.1
`public mixed`	# `__invoke( )` Invokes a stored callback or returns the stored value. Invokes a stored callback or returns the stored value. If the stored value is callable (either a callback or an object), it is invoked with all provided parameters, otherwise parameters are ignored and the stored value is returned. Returns mixed Result of invoked callback or stored value. Since 3.1
`public string`	# `__toString( )` Returns the standard PHP string variant of the represented value. Returns the standard PHP string variant of the represented value. Returns string String representation of stored value. Since 3.1 Overrides `Core\Object::__toString`
`public boolean`	# `bit( boolean $default = null )` Returns a three-state bit conversion of the stored value. Returns a three-state bit conversion of the stored value. `null` is returned whenever the stored value is `null` or does not conform to a generic representation of a Boolean value. Supported Boolean conversions include `1`, `true`, `"on"` and `"yes"` for `true` and `0`, `false`, `"off"` and `"no"` for `false`. Parameters `$default` Optional. Default value to return if the converted value yields `null`. Returns boolean `true`, if the stored value is a known representation of `true`, `false` if it is a known representation of `false`, otherwise `null`. Since 3.1
`public boolean`	# `bool( boolean $default = null )` Returns a PHP similar Boolean conversion of the stored value. Returns a PHP similar Boolean conversion of the stored value. A value is considered `false`, if it evaluates to `false` or is a string equal to `"false"`, `"off"` or `"no"`. Otherwise `true` is returned, unless the stored value is `null` and `null` is returned. Parameters `$default` Optional. Default value to return if the converted value yields `null`. Returns boolean `true`, if the stored value evaluates to `true`, `false` if it evaluates to `false`, and `null` if the stored value is `null`. Since 3.1
`public integer`	# `compareTo( mixed $var )` Compares the current value with another value. Compares the current value with another value. Parameters `$var` Value to compare current Value with. Returns integer Returns < 0 if the current value is less than the parameter value; > 0 if the current value is greater than the parameter value, and 0 if both are equal. See `Core\Value::isEqualTo()` Since 3.1 Implementation of `Core\Comparable::compareTo()`
`public array`	# `explode( string $delimiter, integer $limit = null )` Returns a Value instance storing an array of exploded string segments. Callbacks associated with the current instance are passed on to the returned value instance. Returns a Value instance storing an array of exploded string segments. Callbacks associated with the current instance are passed on to the returned value instance. If any conversion is applied, the data type of the returned Value instance is array, regardless of the current Value instance type. This method equals a call to \explode() with the exception that a limit of zero is not treated as 1 but disables limits. Parameters `$delimiter` The delimiter string to split the currently stored string with. `$limit` Optional. A positive number stops splitting the string after given limit - 1 segments, storing the rest of the string as the last segment. A negative number all segments except the last -limit are returned. If the number is 0 or not set, limits are disabled. Returns array Value instance storing an array of string segments of the current value. If the stored value is `null`, the instance itself is returned instead. Throws `Core\Exception\InvalidArgument` Since 3.1
`public Core\Filter`	# `filter( Core\URI\|string $uri )` Filters the stored value against a named filter. Filters the stored value against a named filter. Assigned callbacks to this Value are passed on to the returned filter Value. Parameters `$uri` URI instance or URI string describing the filer driver to use. Returns `Core\Filter` Filter value instance storing the filtered and original value plus an error flag. The returned object is based on Value thus inherits all Value related properties and methods. Use Filter_Value::valid() to test for validity of the returned value. Since 3.1
`public float`	# `float( float $default = null )` Returns a floating point conversion of the stored value. Returns a floating point conversion of the stored value. Parameters `$default` Default value to return if the converted value yields `null`. Returns float A floating point number or `null` on failure. Since 3.1
`public integer`	# `int( integer $default = null )` Returns an integer conversion of the stored value. Returns an integer conversion of the stored value. Parameters `$default` Default value to return if the converted value yields `null`. Returns integer An integer number or `null` on failure. Since 3.1
`public boolean`	# `isArray( )` Determines whether the stored value is an (native) array. Determines whether the stored value is an (native) array. Returns boolean `true`, if the stored value is an array, otherwise `false`. Since 3.1
`public boolean`	# `isBoolean( )` Determines whether the stored value is Boolean. Determines whether the stored value is Boolean. Returns boolean `true`, if the stored value is Boolean, otherwise `false`. Since 3.1
`public boolean`	# `isCallable( )` Determines whether the stored value is callable (callback or invokable). Determines whether the stored value is callable (callback or invokable). Returns boolean `true`, if the stored value is callable, otherwise `false`. Since 3.1
`public boolean`	# `isCallback( )` Determines whether the stored value is a callback. Determines whether the stored value is a callback. A callback is either a PHP native callback string or array or an instance of the Delegate class. Returns boolean `true`, if the stored value is a callback, otherwise `false`. See `Core\Delegate` Since 3.1
`public boolean`	# `isEqualTo( mixed $object )` Tests, whether the current value is equal to another value. Tests, whether the current value is equal to another value. Tests for equality of the current and provided values, hence value types do not need to match. Parameters `$object` Value or intrinsic type variable to compare current Value with. Returns boolean Returns `true`, if the current value and the value provided are equal, otherwise `false`. Since 3.1 Implementation of `Core\Equality::isEqualTo()`
`public boolean`	# `isFloat( )` Determines whether the stored value is an floating point number. Determines whether the stored value is an floating point number. Returns boolean `true`, if the stored value is a floating point number, otherwise `false`. Since 3.1
`public boolean`	# `isIdenticalTo( mixed $object )` Tests, whether the current value is identical to another value. Tests, whether the current value is identical to another value. Tests for identity of the current and provided values, hence value types need to match. Parameters `$object` Value or intrinsic type variable to compare current Value with. Returns boolean Returns `true`, if the current value and the value provided are identical, otherwise `false`. Since 3.1 Implementation of `Core\Identity::isIdenticalTo()`
`public boolean`	# `isInteger( )` Determines whether the stored value is an integer number. Determines whether the stored value is an integer number. Returns boolean `true`, if the stored value is an integer number, otherwise `false`. Since 3.1
`public boolean`	# `isNull( )` Determines whether the stored value is `null`. Determines whether the stored value is `null`. Returns boolean `true`, if the stored value is null, otherwise `false`. Since 3.1
`public boolean`	# `isNumeric( )` Determines whether the stored value is a number or numeric string. Determines whether the stored value is a number or numeric string. Returns boolean `true`, if the stored value is a number or numeric string, otherwise `false`. Since 3.1
`public boolean`	# `isOffset( )` Determines whether the stored value can be used as an array offset. Determines whether the stored value can be used as an array offset. Returns boolean `true`, if the stored value can be used as an offset, otherwise `false`. Since 3.1
`public boolean`	# `isObject( )` Determines whether the stored value is an object. Determines whether the stored value is an object. Returns boolean `true`, if the stored value is an object, otherwise `false`. Since 3.1
`public boolean`	# `isResource( )` Determines whether the stored value is a resource. Determines whether the stored value is a resource. Returns boolean `true`, if the stored value is a resource, otherwise `false`. Since 3.1
`public boolean`	# `isScalar( )` Determines whether the stored value is a scalar. Determines whether the stored value is a scalar. Scalar values are either integers, floats, strings and `null`. This differs from the native PHP implementation that requires a scalar to have a value (e.g. `0` is considered a scalar by this method, by PHP it is not). Returns boolean `true`, if the stored value is a scalar, otherwise `false`. Since 3.1
`public boolean`	# `isString( )` Determines whether the stored value is a string. Determines whether the stored value is a string. Returns boolean `true`, if the stored value is a string, otherwise `false`. Since 3.1
`public mixed`	# `set( mixed $value, boolean $returnValue = false )` Updates the stored value. Optionally invokes an assigned callback method. Updates the stored value. Optionally invokes an assigned callback method. Parameters `$value` New value to set. `$returnValue` Optional. Whether to return the new value instead of the update result. Default to `false`. Returns mixed If the return value flag is set, the new value value is returned, otherwise `true` on success and `false` otherwise. Event Invokes the Value.Set callback prior to updating the value. If the callback returns a value that evaluates to `false`, the update procedure is cancelled. Since 3.1
`public string`	# `string( string $default = null )` Returns the string conversion of the stored value. Returns the string conversion of the stored value. Parameters `$default` Optional. Default value to return if the converted value yields `null`. Returns string A string or `null` if the stored value is `null`. Since 3.1
`public Core\Value::String`	# `stringObject( string\|Core\Value::String $default = null )` Returns the string conversion of the stored value as a String instance. Returns the string conversion of the stored value as a String instance. Parameters `$default` Optional. Default string value to return if the converted value yields `null`. Returns `Core\Value::String` A String instance containing the string variant of the stored value. If the stored value is `null`, the default string value is used; if the default string value is `null`, the returned String instance represents an empty string. Since 3.1
`public array`	# `toArray( array $default = null )` Returns the value as an array. Returns the value as an array. The conversion of non-array values to an array behaves identical to the way PHP treats conversions of scalars into arrays. Parameters `$default` Optional. Default value to return if the converted value yields `null`. Returns array If the value is an array, it is returned verbatim; otherwise all non-`null` values are returned packed into an array with exactly one element except for objects, which return an array of their public properties; if the value is `null`, the default value or `null` if no default is defined is returned. Since 3.1
`public Core\Value`	# `toLower( )` Returns a Value instance with lowercase variant of the current instance. Callbacks associated with the current instance are passed on to the returned value instance. Returns a Value instance with lowercase variant of the current instance. Callbacks associated with the current instance are passed on to the returned value instance. If any conversion is applied, the data type of the returned Value instance is string, regardless of the current Value instance type. Returns `Core\Value` Value instance storing lowercased value. If the stored value is `null` or the lowercase variant equals the current value, the instance itself is returned. Since 3.1
`public Core\Value`	# `toUpper( )` Returns a Value instance with uppercase variant of the current instance. Callbacks associated with the current instance are passed on to the returned value instance. Returns a Value instance with uppercase variant of the current instance. Callbacks associated with the current instance are passed on to the returned value instance. If any conversion is applied, the data type of the returned Value instance is string, regardless of the current Value instance type. Returns `Core\Value` Value instance storing uppercased value. If the stored value is `null` or the uppercase variant equals the current value, the instance itself is returned. Since 3.1

Methods inherited from Core\Set

__get(), __isset()

Methods inherited from Core\Object

__autocreateFactory(), __call(), __processParameters(), attachMethod(), chain(), getValueForKey(), getValueForKeyPath(), getValueForUndefinedKey(), hash(), issetValueForKey(), setValueForKey(), setValueForKeyPath(), setValueForUndefinedKey(), uuid()

Constants summary

`string`	`Bit` Equals a call to `Core\Value::bit()`. Equals a call to `Core\Value::bit()`. Since 3.1	# `'bit'`
`string`	`Boolean` Equals a call to `Core\Value::bool()`. Equals a call to `Core\Value::bool()`. Since 3.1	# `'bool'`
`string`	`Float` Equals a call to `Core\Value::float()`. Equals a call to `Core\Value::float()`. Since 3.1	# `'float'`
`string`	`Integer` Equals a call to `Core\Value::int()`. Equals a call to `Core\Value::int()`. Since 3.1	# `'int'`
`string`	`LowercaseString` First transform a stored string to lowercase, then returns `Core\Value::string()`. First transform a stored string to lowercase, then returns `Core\Value::string()`. Since 3.1	# `'toLower.string'`
`string`	`String` Equals a call to `Core\Value::string()`. Equals a call to `Core\Value::string()`. Since 3.1	# `'string'`
`string`	`StringObject` Equals a call to `Core\Value::stringObject()`. Equals a call to `Core\Value::stringObject()`. Since 3.1	# `'stringObject'`
`string`	`UppercaseString` First transform a stored string to uppercase, then returns `Core\Value::string()`. First transform a stored string to uppercase, then returns `Core\Value::string()`. Since 3.1	# `'toUpper.string'`

Constants inherited from Core\Object

AnyParameterType, AutochainParameterType, AutocreateParameterType, BooleanParameterType, CharParameterType, EnumParameterType, IntegerParameterType, RealParameterType, StringParameterType, UserParameterType

Properties summary

`protected callable`	`$_v_onSet` Callback invoked on value changes. Callback invoked on value changes. Since 3.1	#
`protected mixed`	`$_v_value` Internal value represented by this instance. Internal value represented by this instance. Since 3.1	#

Magic properties

`public read-only boolean`	`$bit` See `Core\Value::bit()`.
`public read-only boolean`	`$bool` See `Core\Value::bool()`.
`public read-only float`	`$float` See `Core\Value::float()`.
`public read-only integer`	`$int` See `Core\Value::int()`.
`public read-only boolean`	`$isArray` See `Core\Value::isArray()`.
`public read-only boolean`	`$isBoolean` See `Core\Value::isBoolean()`.
`public read-only boolean`	`$isCallable` See `Core\Value::isCallable()`.
`public read-only boolean`	`$isCallback` See `Core\Value::isCallback()`.
`public read-only boolean`	`$isFloat` See `Core\Value::isFloat()`.
`public read-only boolean`	`$isInteger` See `Core\Value::isInteger()`.
`public read-only boolean`	`$isNull` See `Core\Value::isNull()`.
`public read-only boolean`	`$isNumeric` See `Core\Value::isNumeric()`.
`public read-only boolean`	`$isOffset` See `Core\Value::isOffset()`.
`public read-only boolean`	`$isObject` See `Core\Value::isObject()`.
`public read-only boolean`	`$isResource` See `Core\Value::isResource()`.
`public read-only boolean`	`$isScalar` See `Core\Value::isScalar()`.
`public read-only boolean`	`$isString` See `Core\Value::isString()`.
`public read-only callable`	`$onSet` Callback invoked if the value represented by this instance has changed.
`public read-only string`	`$string` See `Core\Value::string()`.
`public read-only Core\Value::String`	`$stringObject` See `Core\Value::stringObject()`.
`public read-only mixed`	`$value` Raw internal value represented by this instance.

Magic properties inherited from Core\Object

$hash, $uuid

Namespaces

Classes

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Constants

Class Value

Direct known subclasses

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