Online PHP editor | output for ggMoY

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: Warning: array_flip(): Can only flip string and integer values, entry skipped in /in/ggMoY on line 5 array(2) { ["description"]=> string(16) "desc bla bla bla" ["summary"]=> string(19) "summary bla bla bla" }
Output for 4.3.2 - 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: Warning: array_flip(): Can only flip STRING and INTEGER values! in /in/ggMoY on line 5 array(2) { ["description"]=> string(16) "desc bla bla bla" ["summary"]=> string(19) "summary bla bla bla" }
Output for 4.3.0 - 4.3.1: Warning: array_flip() [http://www.php.net/function.array-flip]: Can only flip STRING and INTEGER values! in /in/ggMoY on line 5 array(2) { ["description"]=> string(16) "desc bla bla bla" ["summary"]=> string(19) "summary bla bla bla" }