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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($match) { var_dump($match); if (substr($match[1], -1) === '$' && preg_match('#^[a-z0-9_\-]+\$$#i', $match[1])) { return substr($match[1], 0, -1); } return '1'; }, $route), "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(5) "(\d+)" [1]=> string(5) "(\d+)" } array(2) { [0]=> string(7) "upload$" [1]=> string(7) "upload$" } /path/1/new/upload array(2) { [0]=> string(5) "(\w+)" [1]=> string(5) "(\w+)" } array(2) { [0]=> string(5) "(\d+)" [1]=> string(5) "(\d+)" } /path/selectable_ajax_placements/1/1 array(2) { [0]=> string(5) "(\d+)" [1]=> string(5) "(\d+)" } array(2) { [0]=> string(11) "([\d\-\_]+)" [1]=> string(11) "([\d\-\_]+)" } array(2) { [0]=> string(12) "([\d\-\_]+)$" [1]=> string(12) "([\d\-\_]+)$" } /path/anotherpath/to/1/from/1/to/1 array(2) { [0]=> string(5) "list$" [1]=> string(5) "list$" } /path/list

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