Description:
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When trying to match newlines with the PCRE_DOLLAR_ENDONLY modifier in conjunction with the "|" operator, it matches more than it should.

My original test case was using a regex of '/^\n|\r\n|\r$/D' against a string containing other characters. I've simplified the test below.

Test script:
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echo preg_match('/^\n|\n$/D', "\nasdf", $matches);

Expected result:
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0

Actual result:
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1