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请教大神preg_replace如何替换成preg_replace_callback

程序员文章站 2022-05-11 19:14:19
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 private function escapeReserved($query)  {               $search = array ("/({)(\w+)(})/e",                          "/({L#)([0-9]+)(})/e", 		          "/(\:)(uid|session|file|access|mode|comment|desc|size|start|end)/e",                        )	    $replace = array ("'\"\\1'.strtoupper('\\2').'\\3\"'",				          "'\"\\1'.strtoupper('\\2').'\\3\"'",				          "'\\1'.'db_'.'\\2'.'\\3'",)			          return preg_replace($search, $replace, $query);  	  }


如何将preg_replace()替换成preg_replace_callback()呢


回复讨论(解决方案)

$s = '{Test}{L#123456}:uid';echo escapeReserved($s);// "{TEST}""{L#123456}":db_uidecho '
';echo test($s);//"{TEST}""{L#123456}":db_uidfunction escapeReserved($query){ $search = array ("/({)(\w+)(})/e", "/({L#)([0-9]+)(})/e", "/(\:)(uid|session|file|access|mode|comment|desc|size|start|end)/e"); $replace = array ("'\"\\1'.strtoupper('\\2').'\\3\"'", "'\"\\1'.strtoupper('\\2').'\\3\"'", "'\\1'.'db_'.'\\2'.'\\3'"); return preg_replace($search, $replace, $query); }function test($query){ $search = array ("/({)(\w+)(})/", "/({L#)([0-9]+)(})/", "/(\:)(uid|session|file|access|mode|comment|desc|size|start|end)/"); return preg_replace_callback($search, function($m) { if(isset($m[3])){ return '"'.$m[1].strtoupper($m[2]).$m[3].'"'; }else{ return "$m[1]db_$m[2]"; } }, $query);}