Debian 9 PHP7.4 can't install curl

Niammmin asked:

I already searched answer for this question and checked Bartek Chanda answer, but not working with me. I have debian 9.13 and already done what Bartek Chanda answered, but not working.

Still got this error:

php7.4-curl : Depends: php7.4-common (= but 7.4.12-3+0~20201103.32+debian9~1.gbpa97e22 is to be installed

Depends: libcurl4 (>= 7.56.1) but it is not installable
E: Unable to correct problems, you have held broken packages.

My answer:

You say you have Debian 9 but you appear to have added an apt source intended for Ubuntu 21.04. Remove it and replace it with the correct apt source, then try again.

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