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<?php $str= 'There must be a fast and efficient way to split a (text) string at the "nth" occurrence of a needle.'; var_export( preg_split('/([^ ]*\K ){2}/', $str, 2) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'There must', 1 => 'be a fast and efficient way to split a (text) string at the "nth" occurrence of a needle.', )

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