if $lines = explode n file_get_contentsproccpuinfo

The given code is checking if the result of the explode() function is assigned to the variable $lines. The explode() function is used to split a string into an array based on a specified delimiter. In this case, the delimiter is the newline character (\n).

The file_get_contents('/proc/cpuinfo') function is used to read the content of the file located at '/proc/cpuinfo'. This file typically contains information about the CPU(s) installed on a Linux system.

So, the code is reading the content of the '/proc/cpuinfo' file, splitting it into an array of lines, and assigning it to the variable $lines