PHP Web page Output information is not a complete solution

PHP page output information is not complete
My PHP through the socket to receive the data sent by the server, I see the length and the number of bytes sent over the servers are equal, but the output is not complete, I output through the htmlentities, is there a limit on the number of Web bytes? Each commit query returns results, the output of the information is always less, not necessarily less, such as the first time less than 1000 bytes, the next time there may be less than 2000 how to solve it?

I am in Php+apache environment test is normal, use of xampp. In the Linux environment, NGINX+PHP+PHP-FPM can not, output is not complete, where is the problem of the setting?

------to solve the idea----------------------
This is an XML string, although all
But the Chinese is GBK encoded (at least you're giving this part)
You should check the processing code at the output

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