问一下关于mysqli的store_result()和PDO的fetch_all()的区别解决方法 -PHP Tutorial-php.cn

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问一下关于mysqli的store_result()和PDO的fetch_all()的区别解决方法

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Jun 13, 2016 pm 01:39 PM

fetchmysqlistore

问一下关于mysqli的store_result()和PDO的fetch_all()的区别
这两个函数的功能都是一次性把结果集取回到本地吧？

那为什么store_result()在教材上写的是可以提高脚本效率，而fetch_all()是不建议使用，因为它的效率低。

为什么两个功能一样的函数，会有这么大不同呢？

谢谢！

------解决方案--------------------
你那是什么教材？
为什么要把不同的东西放在一起比较？

------解决方案--------------------
哪里一样了，PDO的fetchAll()和mysqli的fetch_all()差不多一个功能。都是将结果集全部转换为数组或对象。
但store_result()就是另一回事了：
如果需要对所有记录而不只是一小部分进行处理，可以调用mysqli_stmt对象中的store_result()方法，把所有结果一次全部传回到PHP程序中。这样做不仅更有效率，而且能减轻服务器的负担。store_result()方法是可选的，除了读取数据不改变任何东西。

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