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<?php $files = [ 'slider-1.jpg', 'slider-2.png', 'slider-4.gif', 'slider-8.png', 'slider-11.gif', ]; var_export( 1 + max( preg_replace('#\D*(\d+).*#', '$1', $files) ) );
Output for git.master, git.master_jit
12

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