I found that the core file has not been generated, but the core file will be generated when the script is manually run.
After guidance from a friend, it turned out that it was a problem caused by the script execution environment:
Add ulimit to the script -a >>
Print as follows:
core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 127364 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 4096 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 127364 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
core file size is actually 0
Add a sentence before running the script: ulimit -c unlimited
Solve the problem.
A core file can be generated.
The above is the full content of the PHP method to execute shell scripts to run programs without generating core files. I hope everyone supports me~