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<?php $test = array(); $test[0][0] = "sample_00"; $test[0][1] = "sample_01"; $test[1][0] = "sample_10"; echo $test[0][0]; echo $test[0][1]; echo $test[1][0]; ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
sample_00sample_01sample_10