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<?php $inputs = [ 'd2.r1.4#100.37#1.9#2.3#1', 'd2.r1.4#100.37#1.9#2.38#1.8#22', 'd2.r1.4#100.37#1.9#2.3#1.12#2.30#2', ]; $pattern = '/^d[1-7]\.r[1-6](?:\.(?:3[0-7]|[12]\d|[1-9])#\d+)*$/i'; foreach ($inputs as $input) { echo "\n{$input}: "; var_export((bool)preg_match($pattern, $input)); }
Output for git.master, git.master_jit, rfc.property-hooks
d2.r1.4#100.37#1.9#2.3#1: true d2.r1.4#100.37#1.9#2.38#1.8#22: false d2.r1.4#100.37#1.9#2.3#1.12#2.30#2: true

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