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run code in 300+ PHP versions simultaneously
<?php define( 'GUTENBERG_VERSION', '11.8.0' ); var_dump( version_compare( GUTENBERG_VERSION, '11.9', '<' ) ); var_dump( version_compare( GUTENBERG_VERSION, '11.8', '<=' ) );
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
bool(true) bool(false)

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