如何在PHP系统调用中转义引号？

I'm passing to perl from php using escapeshellarg

system("perl -e '" . escapeshellarg($inp) . "' >> /tmp/out");

And get unterminated quoted string from perl.

Input is: 'Single quoted terminated string ';

Please note that escapeshellarg adds the outer single quotes itself.

So you should leave them out:

system("perl -e " . escapeshellarg($inp) . " >> /tmp/out");
#              ^                            ^ no extra ' quotes here