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17 lines
534 B
Markdown
17 lines
534 B
Markdown
# Iterator
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## Purpose
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To make an object iterable and to make it appear like a collection of objects.
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## Examples
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* to process a file line by line by just running over all lines (which have an object representation) for a file (which of course is an object, too)
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## Note
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Standard PHP Library (SPL) defines an interface Iterator which is best suited for this! Often you would want to implement the Countable interface too, to allow `count($object)` on your iterable object
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## UML Diagram
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