while (1){
echo memory_get_usage();
echo ';';
foreach(null as $each){
echo 1;
}
sleep(1);
}The console output shows that the memory usage continues to increase. Replacing null with [] will not cause this phenomenon. Seek to explain?
while (1){
echo memory_get_usage();
echo ';';
foreach(null as $each){
echo 1;
}
sleep(1);
}The console output shows that the memory usage continues to increase. Replacing null with [] will not cause this phenomenon. Seek to explain?
PHP7 environment actual test
Visual inspection shows a warning when the null is reached. .
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
