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<?php $tests = [ 'This string s_0a1f2d4e3c10b is foo.', 's_1a23b456c789', 'b_9d9d9d9d9d', 's_1e2f3a4b' ]; foreach ($tests as $test) { var_export( preg_match_all( '~(?:s_|\G(?!^)[a-z]+)\K\d+~', $test, $matches ) ? $matches[0] : [] ); echo "\n---\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => '0', 1 => '1', 2 => '2', 3 => '4', 4 => '3', 5 => '10', ) --- array ( 0 => '1', 1 => '23', 2 => '456', 3 => '789', ) --- array ( ) --- array ( 0 => '1', 1 => '2', 2 => '3', 3 => '4', ) ---

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