Baigudin Software participates in OS DAY 2017 conference

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Interface «DomBuilder\Api\Traverse»

Elements tree traversal access declaration.

interface Api\Traverse

All superinterfaces:

Object

Element|null child(int $number=0);

Element children();

Element|null last();

Element|null next();

Element|null parent();

Element|null prev();

Element root();

public Element|null child(int $number=0);

Returns child elements.

The method returns a collection of child elements that depends on given sequence number and contains a child element of each element if that element is existed or returns NULL value if no child elements is found.

Parameters:
int $number — a sequence number of child elements.

Returns:
Element|null — child elements.

public Element children();

Returns children of each element.

Returns:
Element — child elements of each element.

public Element|null last();

Returns last child elements.

The method returns a collection of last child elements that contains a last child element of each element if that element is existed or returns NULL value if no last child elements is found.

Returns:
Element|null — last child elements.

public Element|null next();

Returns next elements.

The method returns a collection of next elements that contains a next element of each element if that element is existed or returns NULL value if no next elements is found.

Returns:
Element|null — next elements.

public Element|null parent();

Returns parent elements.

The method returns a collection of parent elements that contains a parent element of each element if that element is existed or returns NULL value if no parent elements is found.

Returns:
Element|null — parent elements.

public Element|null prev();

Returns previous elements.

The method returns a collection of previous elements that contains a previous element of each element if that element is existed or returns NULL value if no previous elements is found.

Returns:
Element|null — previous elements.

public Element root();

Returns root elements of each element.

Returns:
Element — root elements.

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