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@ 2013-05-14T10:33:39Z

<?php
if (version_compare('5.4', PHP_VERSION)) {
    echo 'running 5.3 legacy code';
} else {
    echo 'running 5.4 code';
}

Output
Performance
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References
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version_compare: documentation ( source)

preferences:dark modelive preview

32.19 ms | 402 KiB | 5 Q