PHP Export CSV file size How to remove the limit?

I use PHP locally to export a database table of data into a CSV file, can be fully exported, the size can go to more than 800 K
And I have the same PHP program on the site to export the same data table, can only export 8k multi-data.
Try using Ini_set (' memory_limit ', ' 32M '); No, you can only export more than 8k, for a data table export can only export 8k more.
Where do you want to change it, please?

Reply to discussion (solution)

Do you have to be out of memory? Not necessarily, huh?
If memory is low, it will be an error.

Maybe it's just that you have so much data.

Thank you, find out why, because my code iconv the problem of transcoding

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