正则表达式后向引用
php code$reg = /(\d{2})\/(\d{2})\/(\d{4})/e;$text = '01/25/2009到02/02/2009';$replace = \${3},\${1};echo preg_replace($reg, $replace, $text);
报错：syntax error, unexpected ','
如果将逗号去掉，输出“200901到200902 ”
把逗号换成别的符号也都会报错~
------解决方案--------------------
把e去掉