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<?php $a = 1; $b = 2; print_r(compact($a, $b));
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: compact(): Argument #1 must be string or array of strings, int given in /in/d2R0T on line 6 Warning: compact(): Argument #2 must be string or array of strings, int given in /in/d2R0T on line 6 Array ( )
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Array ( )

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