Currently, there are multiple radar devices that scan a certain area. After scanning, data of approximately 1.4 million points (each point contains 4 attributes) will be returned.
Then the radar device splices the data into a string separated by ,: "x1,y1,a1,p1,x2,y2,a2,p2......x1400000, y1400000,a1400000,p1400000"
The size of this string should be tens of megabytes, less than 100 megabytes.
PHP code is processed like this:

$num=$_POST['num'];//点的总数量
$str=$_POST['str'];//点的4个属性组成的字符串
$str_arr=expload(',',$str);//将字符串转换为数组

//将数组转换成json字符串
$point=array();
for($n=1;$n<=$num;$n++){
    $x=$str_arr[$n*4-4];
    $y=$str_arr[$n*4-3];
    $a=$str_arr[$n*4-2];
    $p=$str_arr[$n*4-1];
    $point[]=array("x"=>$x,"y"=>$y,"a"=>$a,"$p"=>$p);
}
$json_str=json_encode($point);

//将json字符串保存在".txt"文件中
$handle=fopen("./1.txt","w");
fwrite($handle, $json_str);
fclose($handle);

//返回请求成功信息
echo "ask=1&cmd=3";
exit;

I don’t know much about memory consumption, and this is the first time to process such a large amount of data.
When the data transmitted by the radar is only 11W groups of points (about 3MB data) , I can successfully receive and process it here
When the data is a little larger, it will promptThe memory limit is 128M
I checked some methods on the Internet, most of them are called changesphp.iniIn the filememory_limit=-1
But after changing it, it still cannot be transmitted
Currently, the discussion with Radar is that he can transmit it to me at most every time 10WGroup points, and then add one more parameterHow many points are left in this transmission. After PHP receives it, it will be given to him as a return value. He will call back and continue to send it to me, but after calculating it like this, It takes a total of 14 to 15 transmissions to send a set of data...and the feasibility is not yet certain
Could you please tell me how you dealt with this problem when you encountered it during development?
Waiting online. . .