php - PHP 中的 MySql 查询语法错误

Question

这段代码有什么问题

$FN=strtok($_POST['IS'],' ');
$LN=strtok(' ');
$query="SELECT person_id FROM a_person WHERE first_name=$FN AND last_name=$LN";

错误是这样说的，我不知道为什么？

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Select AND last_name=' at line 1

Answer 1

你需要引用$FN和$LN

$query = "SELECT person_id FROM a_person WHERE first_name='$FN' AND last_name='$LN'";