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<?php $tests = array( 0, '0', '', null, ); foreach ($tests as $element) { if (is_numeric($element)) { echo "'{$element}' is numeric", PHP_EOL; } else { echo "'{$element}' is NOT numeric", PHP_EOL; } } ?>
Output for git.master, git.master_jit, rfc.property-hooks
'0' is numeric '0' is numeric '' is NOT numeric '' is NOT numeric

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