将 mysql_fetch_array 转换为 PDO::FETCH_NUM
                            本文介绍了将 mysql_fetch_array 转换为 PDO::FETCH_NUM的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
                        
                        问题描述
这两个代码在PDO中的等价物是什么
What is the equivalent of these two code in PDO
第一:
  $row=mysql_fetch_array($query);
第二个:
 while($row=mysql_fetch_array($query)){
   $data[]=$row;
 }
我在下面使用了这些代码,但我猜它们并不完全相同,因为其余的代码不起作用.
i used these codes below but they are not exact same i guess, because the rest of the code didn't work.
$row = $query->fetch(PDO::FETCH_NUM);
和
 $data[] = $query->fetch(PDO::FETCH_ASSOC);
推荐答案
对应关系如下:
mysql_fetch_array=fetch(PDO::FETCH_BOTH)- 行是具有数字索引和命名索引的数组.mysql_fetch_assoc=fetch(PDO::FETCH_ASSOC)- 行是具有命名索引的数组.mysql_fetch_row=fetch(PDO::FETCH_NUM)- 行是带有数字索引的数组.mysql_fetch_object=fetch(PDO::FETCH_OBJ)或fetch(PDO::FETCH_CLASS)取决于您是否指定了可选的mysql_fetch_object的 >className 参数.行是指定类或stdClass的对象.
mysql_fetch_array=fetch(PDO::FETCH_BOTH)- The rows are arrays with both numeric and named indexes.mysql_fetch_assoc=fetch(PDO::FETCH_ASSOC)- The rows are arrays with named indexes.mysql_fetch_row=fetch(PDO::FETCH_NUM)- The rows are arrays with numeric indexes.mysql_fetch_object=fetch(PDO::FETCH_OBJ)orfetch(PDO::FETCH_CLASS)depending on whether you specify the optionalclassNameargument tomysql_fetch_object. The rows are objects, either of the specified class orstdClass.
while 循环相当于:
$data = $query->fetchAll(PDO::FETCH_BOTH)
                        这篇关于将 mysql_fetch_array 转换为 PDO::FETCH_NUM的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持编程学习网!
