Class ViewBlock

ViewBlock implements the concept of Blocks or Slots in the View layer. Slots or blocks are combined with extending views and layouts to afford slots of content that are present in a layout or parent view, but are defined by the child view or elements used in the view.

Namespace: Cake\View
Location: View/ViewBlock.php

Constants summary

Properties summary

  • $_active protected
    array
    The active blocks being captured.
  • $_blocks protected
    array
    Block content. An array of blocks indexed by name.
  • $_discardActiveBufferOnEnd protected
    boolean
    Should the currently captured content be discarded on ViewBlock::end()

Method Summary

  • active() public
    Get the name of the currently open block.
  • concat() public

    Concat content to an existing or new block. Concating to a new block will create the block.

  • end() public
    End a capturing block. The compliment to ViewBlock::start()
  • exists() public
    Check if a block exists
  • get() public
    Get the content for a block.
  • keys() public
    Get the names of all the existing blocks.
  • set() public

    Set the content for a block. This will overwrite any existing content.

  • start() public
    Start capturing output for a 'block'
  • unclosed() public
    Get the names of the unclosed/active blocks.

Method Detail

active()source public 

active( )

Get the name of the currently open block.

Returns

string|null
Either null or the name of the last open block.

concat()source public 

concat( string $name , mixed $value null , string $mode ViewBlock::APPEND )

Concat content to an existing or new block. Concating to a new block will create the block.

Calling concat() without a value will create a new capturing block that needs to be finished with View::end(). The content of the new capturing context will be added to the existing block context.

Parameters

string $name
Name of the block
mixed $value optional null

The content for the block. Value will be type cast to string.

string $mode optional ViewBlock::APPEND

If ViewBlock::APPEND content will be appended to existing content. If ViewBlock::PREPEND it will be prepended.

end()source public 

end( )

End a capturing block. The compliment to ViewBlock::start()

See

\Cake\View\ViewBlock::start()

exists()source public 

exists( string $name )

Check if a block exists

Parameters

string $name
Name of the block

Returns

boolean

get()source public 

get( string $name , string $default '' )

Get the content for a block.

Parameters

string $name
Name of the block
string $default optional ''
Default string

Returns

string
The block content or $default if the block does not exist.

keys()source public 

keys( )

Get the names of all the existing blocks.

Returns

array
An array containing the blocks.

set()source public 

set( string $name , mixed $value )

Set the content for a block. This will overwrite any existing content.

Parameters

string $name
Name of the block
mixed $value

The content for the block. Value will be type cast to string.

start()source public 

start( string $name , string $mode ViewBlock::OVERRIDE )

Start capturing output for a 'block'

Blocks allow you to create slots or blocks of dynamic content in the layout. view files can implement some or all of a layout's slots.

You can end capturing blocks using View::end(). Blocks can be output using View::get();

Parameters

string $name
The name of the block to capture for.
string $mode optional ViewBlock::OVERRIDE

If ViewBlock::OVERRIDE existing content will be overridden by new content. If ViewBlock::APPEND content will be appended to existing content. If ViewBlock::PREPEND it will be prepended.

Throws

Cake\Core\Exception\Exception
When starting a block twice

unclosed()source public 

unclosed( )

Get the names of the unclosed/active blocks.

Returns

array
An array of unclosed blocks.

Properties detail

$_activesource

protected array

The active blocks being captured.

[]

$_blockssource

protected array

Block content. An array of blocks indexed by name.

[]

$_discardActiveBufferOnEndsource

protected boolean

Should the currently captured content be discarded on ViewBlock::end()

See

\Cake\View\ViewBlock::end()
false

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https://api.cakephp.org/3.4/class-Cake.View.ViewBlock.html