mysqli_fetch_assoc
一次只取一行。并且没有任何东西可以使用mysqli
AFAIK 获取所有行(不是完整的 mysqli pro)。(编辑:有)
我建议你把它变成一个迭代器,然后像数组一样使用这个迭代器:
/**
* Iterator that fetches each iteration value from a
* function until it is not string and equals false.
*/
class FetchIterator extends NoRewindIterator
{
/**
* @var string
*/
private $fetchCallback;
/**
* number of the current iteration
* @var int
*/
private $virtual;
/**
* cache of the current value
* @var mixed
*/
private $current;
/**
* @param string $fetchCallback
*/
public function __construct($fetchCallback)
{
$this->fetchCallback = $fetchCallback;
$this->virtual = 0;
}
/**
* Return the current element
* @link http://php.net/manual/en/iterator.current.php
* @return mixed Can return any type.
*/
public function current()
{
$this->virtual || $this->next();
return $this->current;
}
/**
* Return the key of the current element
* @link http://php.net/manual/en/iterator.key.php
* @return scalar scalar on success, integer
* 0 on failure.
*/
public function key()
{
$this->virtual || $this->next();
return $this->virtual - 1;
}
/**
* Checks if current position is valid
* @link http://php.net/manual/en/iterator.valid.php
* @return boolean The return value will be casted to boolean and then evaluated.
* Returns true on success or false on failure.
*/
public function valid()
{
$this->virtual || $this->next();
return $this->validate();
}
/**
* @return bool
*/
private function validate()
{
return FALSE != $this->current || is_string($this->current);
}
/**
* Move forward to next element
* @link http://php.net/manual/en/iterator.next.php
* @return void Any returned value is ignored.
*/
public function next()
{
if ($this->virtual && ! $this->validate()) {
return;
}
$this->fetch();
$this->virtual++;
}
/**
* fetch value from callback. can be called
* after assigning a new callback while
* in iteration.
*/
public function fetch()
{
$func = $this->fetchCallback;
$this->current = $func();
}
/**
* number of times the fetch callback function
* has been called so far.
*
* @return int
*/
public function getCallCount()
{
return $this->virtual;
}
/**
* @return callback
*/
public function getFetchCallback()
{
return $this->fetchCallback;
}
/**
* Set callback for subsequent iterations.
*
* @param callback $fetchCallback
* @return FetchIterator
*/
public function setFetchCallback($fetchCallback)
{
$this->fetchCallback = $fetchCallback;
return $this;
}
}
用法:
$info_wu = mysqli_query($link,"SELECT `hostname`, `page` from `pages`");
$fetchFunction = function() use ($info_wu) {
return mysqli_fetch_assoc($info_wu);
}
$it = new FetchIterator($fetchFunction);
$rows = iterator_to_array($it);
变量$rows
现在是一个数组,每个元素包含一行。而不是iterator_to_array
您也可以使用foreach
并自行处理每一行。
迭代器代码对于您的情况可能看起来有点过多,它是一种更通用的代码,可用于数据库结果操作的许多情况。一篇相关的博客文章是:Some PHP Iterator Fun,展示了如何多次迭代同一个迭代器。