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<?php $test = array( 'foo' => 23, 'bar' => 42, 'fubar' => 23, ); unset($test['bar']); var_dump($test); exit;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { ["foo"]=> int(23) ["fubar"]=> int(23) }