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<?php $a = array( 'foo' => 'bar', 'example' => 'data', 'sn' => 'afu', ); $test = 'foo'; echo '$a["example"]= '; var_dump($a['example']); echo '$test= '; var_dump($test); echo '$a[$test]= '; var_dump($a[$test]);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
$a["example"]= string(4) "data" $test= string(3) "foo" $a[$test]= string(3) "bar"

preferences:
251.34 ms | 406 KiB | 424 Q