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<?php $routes = [ '/path/(\d+)/new/upload$', '/path/selectable_ajax_placements/(\w+)/(\d+)', '/path/anotherpath/to/(\d+)/from/([\d\-\_]+)/to/([\d\-\_]+)$', '/path/list$', ]; foreach ($routes as $route) { echo preg_replace_callback('#(?<=/)([^/]*?[^/a-z0-9_\-][^/]*)(?=/|$)#i', function($match) { if (substr($match[1], -1) === '$' && preg_match('#^[a-z0-9_\-]+$#', $match[1])) { return substr($match[1], 0, -1); } return '1'; }, $route), "\n"; }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
/path/1/new/1 /path/selectable_ajax_placements/1/1 /path/anotherpath/to/1/from/1/to/1 /path/1
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/CX0YS on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/CX0YS on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/CX0YS on line 3
Process exited with code 255.

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