Delimiter must not be alphanumeric or backslash 问题及解决
Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in
正则表达式没有加左右侧的斜线
Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in
正则表达式没有加左右侧的斜线