Use "latest" to signify latest stable

Author: Greg Bowler

Dockerfile

@@ -7,9 +7,10 @@ WORKDIR /tmp/php-build
 RUN ./install-dependencies.sh
 RUN ./install.sh
 # Latest stable and latest snapshot versions:
+ENV PHP_BUILD_CONFIGURE_OPTS="--with-libxml"
 RUN php-build 7.4.10 /etc/php/7.4
+# Other supported:
 RUN php-build 8.0snapshot /etc/php/8.0
-# Previous supported:
 RUN php-build 7.3.22 /etc/php/7.3
 RUN php-build 7.2.33 /etc/php/7.2
 RUN php-build 7.1.33 /etc/php/7.1

switch-php-version

@@ -1,3 +1,10 @@
 #!/bin/bash
+if [ "$1" = "latest" ]
+then
+	version=7.4
+else
+	version=$1
+fi
+
 rm -f /usr/bin/php
-ln -s "/etc/php/$1/bin/php" "/usr/bin/php"
+ln -s "/etc/php/$version/bin/php" "/usr/bin/php"