Class yii\web\HeaderCollection

All Classes | Properties | Methods
Inheritanceyii\web\HeaderCollection » yii\base\BaseObject
ImplementsArrayAccess, Countable, IteratorAggregate, yii\base\Configurable
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/web/HeaderCollection.php

HeaderCollection is used by yii\web\Response to maintain the currently registered HTTP headers.

Public Properties

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Property Type Description Defined By
$count integer The number of headers in the collection. yii\web\HeaderCollection
$iterator ArrayIterator An iterator for traversing the headers in the collection. yii\web\HeaderCollection

Public Methods

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Method Description Defined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__construct() Constructor. yii\base\BaseObject
__get() Returns the value of an object property. yii\base\BaseObject
__isset() Checks if a property is set, i.e. defined and not null. yii\base\BaseObject
__set() Sets value of an object property. yii\base\BaseObject
__unset() Sets an object property to null. yii\base\BaseObject
add() Adds a new header. yii\web\HeaderCollection
canGetProperty() Returns a value indicating whether a property can be read. yii\base\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
className() Returns the fully qualified name of this class. yii\base\BaseObject
count() Returns the number of headers in the collection. yii\web\HeaderCollection
fromArray() Populates the header collection from an array. yii\web\HeaderCollection
get() Returns the named header(s). yii\web\HeaderCollection
getCount() Returns the number of headers in the collection. yii\web\HeaderCollection
getIterator() Returns an iterator for traversing the headers in the collection. yii\web\HeaderCollection
has() Returns a value indicating whether the named header exists. yii\web\HeaderCollection
hasMethod() Returns a value indicating whether a method is defined. yii\base\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes the object. yii\base\BaseObject
offsetExists() Returns whether there is a header with the specified name. yii\web\HeaderCollection
offsetGet() Returns the header with the specified name. yii\web\HeaderCollection
offsetSet() Adds the header to the collection. yii\web\HeaderCollection
offsetUnset() Removes the named header. yii\web\HeaderCollection
remove() Removes a header. yii\web\HeaderCollection
removeAll() Removes all headers. yii\web\HeaderCollection
set() Adds a new header. yii\web\HeaderCollection
setDefault() Sets a new header only if it does not exist yet. yii\web\HeaderCollection
toArray() Returns the collection as a PHP array. yii\web\HeaderCollection
toOriginalArray() Returns the collection as a PHP array but instead of using normalized header names as keys (like toArray()) it uses original header names (case-sensitive). yii\web\HeaderCollection

Property Details

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$count public property

The number of headers in the collection.

public integer $count = null
$iterator public property

An iterator for traversing the headers in the collection.

public ArrayIterator $iterator = null

Method Details

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__call() public method

Defined in: yii\base\BaseObject::__call()

Calls the named method which is not a class method.

Do not call this method directly as it is a PHP magic method that will be implicitly called when an unknown method is being invoked.

public mixed __call ( $name, $params )
$name string

The method name
$params array

Method parameters
return mixed

The method return value
throws yii\base\UnknownMethodException

when calling unknown method

 

                public function __call($name, $params)
{
    throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}
__construct() public method

Defined in: yii\base\BaseObject::__construct()

Constructor.

The default implementation does two things:

  • Initializes the object with the given configuration $config.
  • Call init().

If this method is overridden in a child class, it is recommended that

  • the last parameter of the constructor is a configuration array, like $config here.
  • call the parent implementation at the end of the constructor.
public void __construct ( $config = [] )
$config array

Name-value pairs that will be used to initialize the object properties

 

                public function __construct($config = [])
{
    if (!empty($config)) {
        Yii::configure($this, $config);
    }
    $this->init();
}
__get() public method

Defined in: yii\base\BaseObject::__get()

Returns the value of an object property.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $value = $object->property;.

See also __set().

public mixed __get ( $name )
$name string

The property name
return mixed

The property value
throws yii\base\UnknownPropertyException

if the property is not defined
throws yii\base\InvalidCallException

if the property is write-only

 

                public function __get($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter();
    } elseif (method_exists($this, 'set' . $name)) {
        throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
}
__isset() public method

Defined in: yii\base\BaseObject::__isset()

Checks if a property is set, i.e. defined and not null.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing isset($object->property).

Note that if the property is not defined, false will be returned.

See also https://www.php.net/manual/en/function.isset.php.

public boolean __isset ( $name )
$name string

The property name or the event name
return boolean

Whether the named property is set (not null).

 

                public function __isset($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter() !== null;
    }
    return false;
}
__set() public method

Defined in: yii\base\BaseObject::__set()

Sets value of an object property.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $object->property = $value;.

See also __get().

public void __set ( $name, $value )
$name string

The property name or the event name
$value mixed

The property value
throws yii\base\UnknownPropertyException

if the property is not defined
throws yii\base\InvalidCallException

if the property is read-only

 

                public function __set($name, $value)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter($value);
    } elseif (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Setting read-only property: ' . get_class($this) . '::' . $name);
    } else {
        throw new UnknownPropertyException('Setting unknown property: ' . get_class($this) . '::' . $name);
    }
}
__unset() public method

Defined in: yii\base\BaseObject::__unset()

Sets an object property to null.

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing unset($object->property).

Note that if the property is not defined, this method will do nothing. If the property is read-only, it will throw an exception.

See also https://www.php.net/manual/en/function.unset.php.

public void __unset ( $name )
$name string

The property name
throws yii\base\InvalidCallException

if the property is read only.

 

                public function __unset($name)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter(null);
    } elseif (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Unsetting read-only property: ' . get_class($this) . '::' . $name);
    }
}
add() public method

Adds a new header.

If there is already a header with the same name, the new one will be appended to it instead of replacing it.

public $this add ( $name, $value )
$name string

The name of the header
$value string

The value of the header
return $this

The collection object itself

 

                public function add($name, $value)
{
    $normalizedName = strtolower($name);
    $this->_headers[$normalizedName][] = $value;
    if (!\array_key_exists($normalizedName, $this->_originalHeaderNames)) {
        $this->_originalHeaderNames[$normalizedName] = $name;
    }
    return $this;
}
canGetProperty() public method

Defined in: yii\base\BaseObject::canGetProperty()

Returns a value indicating whether a property can be read.

A property is readable if:

  • the class has a getter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also canSetProperty().

public boolean canGetProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property can be read

 

                public function canGetProperty($name, $checkVars = true)
{
    return method_exists($this, 'get' . $name) || $checkVars && property_exists($this, $name);
}
canSetProperty() public method

Defined in: yii\base\BaseObject::canSetProperty()

Returns a value indicating whether a property can be set.

A property is writable if:

  • the class has a setter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also canGetProperty().

public boolean canSetProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property can be written

 

                public function canSetProperty($name, $checkVars = true)
{
    return method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name);
}
className() public static method
Deprecated since 2.0.14. On PHP >=5.5, use ::class instead.

Defined in: yii\base\BaseObject::className()

Returns the fully qualified name of this class.

public static string className ( )
return string

The fully qualified name of this class.

 

                public static function className()
{
    return get_called_class();
}
count() public method

Returns the number of headers in the collection.

This method is required by the SPL Countable interface. It will be implicitly called when you use count($collection).

public integer count ( )
return integer

The number of headers in the collection.

 

                #[\ReturnTypeWillChange]
public function count()
{
    return $this->getCount();
}
fromArray() public method (available since version 2.0.3)

Populates the header collection from an array.

public void fromArray ( array $array )
$array array

The headers to populate from

 

                public function fromArray(array $array)
{
    foreach ($array as $name => $value) {
        $this->set($name, $value);
    }
}
get() public method

Returns the named header(s).

public string|array|null get ( $name, $default = null, $first = true )
$name string

The name of the header to return
$default mixed

The value to return in case the named header does not exist
$first boolean

Whether to only return the first header of the specified name. If false, all headers of the specified name will be returned.
return string|array|null

The named header(s). If $first is true, a string will be returned; If $first is false, an array will be returned.

 

                public function get($name, $default = null, $first = true)
{
    $normalizedName = strtolower($name);
    if (isset($this->_headers[$normalizedName])) {
        return $first ? reset($this->_headers[$normalizedName]) : $this->_headers[$normalizedName];
    }
    return $default;
}
getCount() public method

Returns the number of headers in the collection.

public integer getCount ( )
return integer

The number of headers in the collection.

 

                #[\ReturnTypeWillChange]
public function getCount()
{
    return count($this->_headers);
}
getIterator() public method

Returns an iterator for traversing the headers in the collection.

This method is required by the SPL interface IteratorAggregate. It will be implicitly called when you use foreach to traverse the collection.

public ArrayIterator getIterator ( )
return ArrayIterator

An iterator for traversing the headers in the collection.

 

                #[\ReturnTypeWillChange]
public function getIterator()
{
    return new \ArrayIterator($this->_headers);
}
has() public method

Returns a value indicating whether the named header exists.

public boolean has ( $name )
$name string

The name of the header
return boolean

Whether the named header exists

 

                public function has($name)
{
    return isset($this->_headers[strtolower($name)]);
}
hasMethod() public method

Defined in: yii\base\BaseObject::hasMethod()

Returns a value indicating whether a method is defined.

The default implementation is a call to php function method_exists(). You may override this method when you implemented the php magic method __call().

public boolean hasMethod ( $name )
$name string

The method name
return boolean

Whether the method is defined

 

                public function hasMethod($name)
{
    return method_exists($this, $name);
}
hasProperty() public method

Defined in: yii\base\BaseObject::hasProperty()

Returns a value indicating whether a property is defined.

A property is defined if:

  • the class has a getter or setter method associated with the specified name (in this case, property name is case-insensitive);
  • the class has a member variable with the specified name (when $checkVars is true);

See also:

public boolean hasProperty ( $name, $checkVars = true )
$name string

The property name
$checkVars boolean

Whether to treat member variables as properties
return boolean

Whether the property is defined

 

                public function hasProperty($name, $checkVars = true)
{
    return $this->canGetProperty($name, $checkVars) || $this->canSetProperty($name, false);
}
init() public method

Defined in: yii\base\BaseObject::init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

public void init ( )

                public function init()
{
}
offsetExists() public method

Returns whether there is a header with the specified name.

This method is required by the SPL interface ArrayAccess. It is implicitly called when you use something like isset($collection[$name]).

public boolean offsetExists ( $name )
$name string

The header name
return boolean

Whether the named header exists

 

                #[\ReturnTypeWillChange]
public function offsetExists($name)
{
    return $this->has($name);
}
offsetGet() public method

Returns the header with the specified name.

This method is required by the SPL interface ArrayAccess. It is implicitly called when you use something like $header = $collection[$name];. This is equivalent to get().

public string|null offsetGet ( $name )
$name string

The header name
return string|null

The header value with the specified name, null if the named header does not exist.

 

                #[\ReturnTypeWillChange]
public function offsetGet($name)
{
    return $this->get($name);
}
offsetSet() public method

Adds the header to the collection.

This method is required by the SPL interface ArrayAccess. It is implicitly called when you use something like $collection[$name] = $header;. This is equivalent to add().

public void offsetSet ( $name, $value )
$name string

The header name
$value string

The header value to be added

 

                #[\ReturnTypeWillChange]
public function offsetSet($name, $value)
{
    $this->set($name, $value);
}
offsetUnset() public method

Removes the named header.

This method is required by the SPL interface ArrayAccess. It is implicitly called when you use something like unset($collection[$name]). This is equivalent to remove().

public void offsetUnset ( $name )
$name string

The header name

 

                #[\ReturnTypeWillChange]
public function offsetUnset($name)
{
    $this->remove($name);
}
remove() public method

Removes a header.

public array|null remove ( $name )
$name string

The name of the header to be removed.
return array|null

The value of the removed header. Null is returned if the header does not exist.

 

                public function remove($name)
{
    $normalizedName = strtolower($name);
    if (isset($this->_headers[$normalizedName])) {
        $value = $this->_headers[$normalizedName];
        unset($this->_headers[$normalizedName], $this->_originalHeaderNames[$normalizedName]);
        return $value;
    }
    return null;
}
removeAll() public method

Removes all headers.

public void removeAll ( )

                public function removeAll()
{
    $this->_headers = [];
    $this->_originalHeaderNames = [];
}
set() public method

Adds a new header.

If there is already a header with the same name, it will be replaced.

public $this set ( $name, $value = '' )
$name string

The name of the header
$value string

The value of the header
return $this

The collection object itself

 

                public function set($name, $value = '')
{
    $normalizedName = strtolower($name);
    $this->_headers[$normalizedName] = (array) $value;
    $this->_originalHeaderNames[$normalizedName] = $name;
    return $this;
}
setDefault() public method

Sets a new header only if it does not exist yet.

If there is already a header with the same name, the new one will be ignored.

public $this setDefault ( $name, $value )
$name string

The name of the header
$value string

The value of the header
return $this

The collection object itself

 

                public function setDefault($name, $value)
{
    $normalizedName = strtolower($name);
    if (empty($this->_headers[$normalizedName])) {
        $this->_headers[$normalizedName][] = $value;
        $this->_originalHeaderNames[$normalizedName] = $name;
    }
    return $this;
}
toArray() public method

Returns the collection as a PHP array.

public array toArray ( )
return array

The array representation of the collection. The array keys are header names, and the array values are the corresponding header values.

 

                public function toArray()
{
    return $this->_headers;
}
toOriginalArray() public method (available since version 2.0.45)

Returns the collection as a PHP array but instead of using normalized header names as keys (like toArray()) it uses original header names (case-sensitive).

public array toOriginalArray ( )
return array

The array representation of the collection.

 

                public function toOriginalArray()
{
    return \array_map(function ($normalizedName) {
        return $this->_headers[$normalizedName];
    }, \array_flip($this->_originalHeaderNames));
}