Does array_walk_recursive use tail call optimization?

Question

Just a simple curiosity. I couldn't find anything on Google, and I definitely don't want to dig into PHP source.

Does array_walk_recursive implement tail call optimization?

Ja͢ck · Accepted Answer · 2012-09-05 14:37:35Z

2

Short answer, no :)

See also: https://github.com/php/php-src/blob/master/ext/standard/array.c#L1097

answered Sep 5, 2012 at 14:37

Ja͢ck

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2 Comments

Florian Margaine Over a year ago

Is there any way to use TCO then?

Ja͢ck Over a year ago

@FlorianMargaine Some languages have optimizations for this, but unfortunately PHP does not; so if you're thinking of using this feature it's probably better to make it iterative instead (which is the poor man's TCO)

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