Because both 7.0.15-0ubuntu0.16.04.1[1] and 7.0.15-0ubuntu0.16.04.4[2] have been released. So the newer version of 7.0.15 which is 7.0.15-0ubuntu0.16.04.4 takes over, while the only available revision of 7.0.18 is: 7.0.18-0ubuntu0.16.04.1.
so if I run:
apt-cache madison php7.0-sqlite3 | grep -iv source
php7.0-sqlite3 7.0.15-0ubuntu0.16.04.4 in amd64 (Security)
php7.0-sqlite3 7.0.15-0ubuntu0.16.04.4 in amd64 (Updates)
php7.0-sqlite3 7.0.18-0ubuntu0.16.04.1 in amd64 (Proposed)
Because both
7.0.15-0ubuntu0.16.04.1
[1] and7.0.15-0ubuntu0.16.04.4
[2] have been released. So the newer version of7.0.15
which is7.0.15-0ubuntu0.16.04.4
takes over, while the only available revision of7.0.18
is:7.0.18-0ubuntu0.16.04.1
.so if I run:
I will get:
and to see which version is candidate for installation:
You'll see that the candidate version for installation is:
7.0.18-0ubuntu0.16.04.1
.You can check published versions here which are: