Test: /ext/standard/tests/strings/chunk_split_variation8.phpt - Version 5.4.20    

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1 (100%)
031+ string(129) "This's heredoc string with and
032+ white space char.
033+ It has _speci@l ch@r$ 2222 !!!Now \k as escape char to test
034+ chunk_split():::"
031-
032- Warning: chunk_split(): Chunk length should be greater than zero in %s on line %d
033- bool(false)