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<?php echo locale_canonicalize('fr-FR@PREEURO') . "\n"; echo "Data Version: " . INTL_ICU_DATA_VERSION . "\n"; echo "ICU Version: ". INTL_ICU_VERSION . "\n";
Output for 8.5.1 - 8.5.3
Fatal error: Uncaught Error: Call to undefined function locale_canonicalize() in /in/FCZki:3 Stack trace: #0 {main} thrown in /in/FCZki on line 3
Process exited with code 255.
Output for 8.1.34, 8.2.30, 8.3.28 - 8.3.30, 8.4.15 - 8.4.18, 8.5.0
fr_FR_PREEURO Data Version: 76.1 ICU Version: 76.1
Output for 8.2.18 - 8.2.29, 8.3.5 - 8.3.27, 8.4.1 - 8.4.14
fr_FR@currency=FRF Data Version: 63.1 ICU Version: 63.1
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
fr_FR@currency=FRF Data Version: 57.1 ICU Version: 57.1

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