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@ 2014-01-16T11:38:06Z

<?php

$locales = array(
    'en_GB',
    'en-GB',
    'en',
    'es_ES@EURO',
    'es_ES@UTF-8',
);

foreach($locales as $locale) {
	var_dump(locale_canonicalize($locale));
}

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

45.86 ms | 402 KiB | 5 Q