sapi/cli: Don't set ini-settings mid-expression in interactive shell

[ReimarPB]

This fixes an issue in the interactive shell (php -a) where the prompt character shown after setting an ini-setting while in the middle of an expression (having pressed enter after an unfinished quote/bracket) would always incorrectly be >.

Here is a demonstration of the current behavior:

Interactive shell

php > $str = "
php " #key=value
php > 

Notice how the last prompt is php > although it should be php " since we are still in the middle of a string.

This PR changes such that the setting is just ignored as long as your expression is unfinished:

Interactive shell

php > $str = "
php " #key=value
php " ";
php > echo $str;

#key=value
php > 

[iluuu1994]

Thank you for the PR!

[iluuu1994]

Thank you! Sorry for the delay, GH does not notify when discussions have been resolved.