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<?php

$regexarray = [
	"@^$@i",  // for homepage
	"@^(?P<controller>[a-z-]+)/(?P<action>[a-z-]+)$@i", // controller/action
	"@^(?P<controller>[a-z-]+)/(?P<id>\d+)/(?P<action>[a-z-]+)$@i", // users/4/delete
	"@^admin/(?P<controller>[a-z-]+)/(?P<action>[a-z-]+)$@i", // admin/users/index
	"@^admin/(?P<controller>[a-z-]+)/(?P<id>\d+)/(?P<action>[a-z-]+)$@i" // admin/users/4/edit
] ;

foreach( $regexarray as $route ) {
	if( preg_match($route,  "admin/users/78/delete", $matches) ) {
		echo "FOUND MATCH " . PHP_EOL;
	}
}

// #####################################################


$admin = "@^$@i";
/* will match:
   empty url, this is the homepage
*/

$admin = '@^admin/(?P<controller>[a-z-]+)/(?P<id>\d+)/(?P<action>[a-z-]+)$@i';
/* will match:
   admin/users/78/delete 
*/

$admin = "@^(?P<controller>[a-z-]+)\/(?P<id>\d+)\/(?P<action>[a-z-]+)$@i" ;
/* will match:
   user/4/edit
*/

$admin = "@^(?P<controller>[a-z-]+)/(?P<action>[a-z-]+)$@i";
/* will match:
   user/login
   user/registration
*/

if( preg_match($admin,  "", $matches) ) {
	echo "FOUND MATCH" . PHP_EOL;
}
else {
	echo "NOT FOUND" ;
}