如何将php变量插入mysql查询？

Question

我有以下声明：

 SELECT bname,cnum,vnum, MATCH(vtext) AGAINST (''".$word."'') as relevance FROM kjv  WHERE MATCH(vtext) AGAINST (''".$word."'') AND bnum='".$book."' ORDER by relevance DESC, bnum, cnum, vnum LIMIT 0,1");

返回空行，但如果我用硬编码值替换变量，一切都会通过。变量不是null，我知道因为我在框中输入后将它们输出到页面。感谢

Answer 1

最好看到更多的周围代码，但我认为这是导致问题的双引号：

SELECT bname,cnum,vnum, MATCH(vtext) AGAINST ('".$word."') as relevance FROM kjv  WHERE MATCH(vtext) AGAINST ('".$word."') AND bnum='".$book."' ORDER by relevance DESC, bnum, cnum, vnum LIMIT 0,1");

Answer 2

嗨，如果您已在变量中保存了值，请尝试此操作。

 SELECT bname,cnum,vnum, MATCH(vtext) AGAINST ('$word') as relevance FROM kjv    WHERE MATCH(vtext) AGAINST ('$word') AND bnum='".$book."' ORDER by relevance DESC, bnum, cnum, vnum LIMIT 0,1");

Answer 3

尝试

mysql_query("SELECT bname,cnum,vnum, MATCH(vtext) AGAINST($word) as relevance FROM kjv  WHERE MATCH(vtext) AGAINST ($word) AND bnum='$book' ORDER by relevance DESC, bnum, cnum, vnum LIMIT 0,1");

Answer 4

试试这样：

SELECT bname,cnum,vnum, MATCH(vtext) AGAINST ("$word") as relevance
FROM kjv  WHERE MATCH(vtext) AGAINST ("$word") AND bnum= "$book" 
ORDER by relevance DESC, bnum, cnum, vnum LIMIT 0,1");