为什么mysqli_query会返回错误？

Question

$q = "INSERT INTO customers (username, email, pass, first_name, last_name) VALUES ('$u', '$e','"  .  password_hash($p, PASSWORD_BCRYPT) .  "', '$fn', '$ln)";

$r = mysqli_query($dbc, $q);

客户表的结构。

id int(10) UNSIGNED AUTO_INCREMENT  
username    varchar(45)         
email index     varchar(80)         
first_name  varchar(20)                 
last_name   varchar(40)         
pass        varchar(255)    
date_created    timestamp   CURRENT_TIMESTAMP   
type    enum('member', 'administer')    

然后，mysqli_affected_rows($dbc)返回-1。

告诉我什么是问题。

Answer 1

在插入的最后一个值中，您错过了一个'。

$q = "INSERT INTO customers (username, email, pass, first_name, last_name) VALUES ('$u', '$e','"  .  password_hash($p, PASSWORD_BCRYPT) .  "', '$fn', '$ln)";

尝试使用此

$q = "INSERT INTO customers (username, email, pass, first_name, last_name) VALUES ('$u', '$e','"  .  password_hash($p, PASSWORD_BCRYPT) .  "', '$fn', '$ln')";