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44e71c8e70
Allow passing a function callback to serialize_block(s) that is invoked on each node in the tree of parsed blocks as it is traversed for serialization. A function argument was chosen for passing the callback function as it reflects a pattern familiar from other algorithms that apply a given callback function while traversing a data structure -- most notably PHP's own `array_map()`. Introducing a filter was considered as an alternative but ultimately dismissed. For a fairly low-level and general-purpose function such as `serialize_block()`, using a filter to pass the callback seemed risky, as it also requires ''removing'' that filter after usage in order to prevent the callback from being accidentally applied when `serialize_block()` is called in an entirely different context. Introducing a separate function for applying a given operation during tree traversal (i.e. independently of serialization) was also considered but dismissed, as it would unnecessarily duplicate tree traversal. Props dlh, gziolo. Fixes #59327. See #59313. git-svn-id: https://develop.svn.wordpress.org/trunk@56557 602fd350-edb4-49c9-b593-d223f7449a82 |
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