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<?php var_dump(locale_lookup(['en', 'fr'], 'fr_CH', true));
Output for 7.0.0 - 7.0.15, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(2) "fr"
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function locale_lookup() in /in/i7dbG:3 Stack trace: #0 {main} thrown in /in/i7dbG on line 3
Process exited with code 255.

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135.52 ms | 401 KiB | 184 Q