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<?php $numeric = ['foo', 'bar', 'qux']; $assoc = ['foo' => 'something', 'bar' => 'else', 'qux' => 'ya']; $fakeNumeric = ['foo', '1' => 'bar', 'qux']; function isNumericKey(array $array) { return is_numeric(implode(array_keys($array))); } var_dump(isNumericKey($numeric)); var_dump(isNumericKey($assoc)); var_dump(isNumericKey($fakeNumeric));
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(false) bool(true)

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