How can I solve the difference between store_result () of mysqli and fetch_all () of PDO?

Q: What is the difference between store_result () of mysqli and fetch_all () of PDO? the two functions return the result set to the local machine at a time? That's why store_result () can improve script efficiency while fetch_all () is not recommended because of its low efficiency. Why are the two functions of the same function so different? Ask the difference between store_result () of mysqli and fetch_all () of PDO
The two functions return the result set to the local machine at one time?

That's why store_result () can improve script efficiency while fetch_all () is not recommended because of its low efficiency.

Why are the two functions of the same function so different?

Thank you!

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What is your teaching material?
Why should we compare different things together?


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Where is the same? the fetchAll () function of PDO is similar to the fetch_all () function of mysqli. Convert all result sets to arrays or objects.
But store_result () is another thing:
If you need to process all records, not just a small part, you can call the store_result () method in the mysqli_stmt object to pass all the results back to the PHP program at a time. This is not only more efficient, but also reduces the burden on the server. The store_result () method is optional, except that reading data does not change anything.