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<?php $a = 1; $b = 1; var_dump( ($a + $a++) === ($b + $b + $b++) );
based on 3Bak6
Output for 5.6.38 - 5.6.40, 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.24, 7.4.0 - 7.4.13, 8.0.0
bool(true)