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<?php $keys = array(1,2,3); function foo($key) { return sprintf(':%s', $key); } $placeholders = array_map('foo', $keys); var_dump($keys);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }

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