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run code in 500+ PHP versions simultaneously
<?php $name = 'this has lots of spaces'; $name = preg_replace('/ +/', '_', $name); print $name . PHP_EOL; $name = 'this has lots of spaces'; $name = preg_replace('/\s+/', '_', $name); print $name . PHP_EOL; $name = 'this has one tab and lots of tabs'; $name = preg_replace('/ +/', '_', $name); print $name . PHP_EOL; $name = 'this has one tab and lots of tabs'; $name = preg_replace('/\s+/', '_', $name); print $name . PHP_EOL;
Output for rfc.property-hooks, git.master, git.master_jit
this has_lots_of_spaces this_has_lots_of_spaces this has one tab and lots of tabs this_has_one_tab_and_lots_of_tabs

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