我在
MySQL中有以下表格:
╔══════╦════╗
║…城市……║…ZIP..║
╠══════╬════╣
║布拉格. ║11000║
║布尔诺…..║34785║
╚═══════════╝
以下代码有效:
Class Mysql{
function connect(){
$this->c = new mysqli(
$this->OPTION['dbhost'],
$this->OPTION['dbuser'],
$this->OPTION['dbpass'],
$this->OPTION['dbname']
);
if($this->c->connect_errno){
exit("Connect failed: ".$this->c->connect_error);
}
if(!$this->c->select_db($this->OPTION['dbname'])){
exit("Cannot select the database: ".$this->OPTION['dbname']);
}
}
function query($query){
if(!$this->c->query($query)){
exit("Cannot execute the query: {$query}<br>MySQL Error: {$this->c->error}<br>MySQL Error Code: {$this->c->errno}");
}
return $this->c->query($query);
}
function fetch_assoc($result){
return $result->fetch_assoc();
}
}
$DB = new Mysql;
$DB->connect();
$query = $DB->query("SELECT city, ZIP FROM cities");
while($row = $DB->fetch_assoc()){
print_r($row);
}
代码一直有效,直到我尝试更改fetch_assoc部分,如下所示:
function fetch_assoc($query){
$result = $this->query($query);
return $result->fetch_assoc();
}
}
$DB = new Mysql;
$DB->connect();
while($row = $DB->fetch_assoc("SELECT city, ZIP FROM cities")){
print_r($row);
}
在这种情况下,它无休止地(由最大执行时间停止)打印表的第一行:
数组([City] => Prague [ZIP] => 11000)
最佳答案 我相信这应该这样做,它将进行一次查询并迭代它,如上面的评论中所述:
$DB = new Mysql;
$DB->connect();
$query = $DB->query("SELECT city, ZIP FROM cities");
$result = $DB->fetch_assoc();
while ($row = $result->fetch_assoc()) print_r($row);