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<?php $pattern = '/(\d{3}(?!$))(\d{3}$)?/'; $replacement = '$1,$2'; $num = 1234; var_dump(preg_replace($pattern, $replacement, $num)); //123,4 $num = 123456789; var_dump(preg_replace($pattern, $replacement, $num)); //123,456,789 $num = 123; var_dump(preg_replace($pattern, $replacement, $num)); //123 $num = 1234567890; var_dump(preg_replace($pattern, $replacement, $num)); //123,456,789,0
Output for git.master_jit, git.master, rfc.property-hooks
string(5) "123,4" string(11) "123,456,789" string(3) "123" string(13) "123,456,789,0"

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