php - 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");

它返回空行，但如果我用硬编码值替换变量，一切都会通过。这些变量不为空，我知道是因为我在将它们输入框中后将它们输出到页面。谢谢

Answer 1

嗨，如果您已经将值保存在变量中，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 2

最好看到更多周围的代码，但我希望它是导致问题的双单引号：

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 3

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");

Answer 4

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");