[php-maint] Bug#820475: php7.0: php5 to php7.0 regression: undefined function xml_parser_create()

[Paul Gevers]

Package: php7.0
Version: 7.0.5-2
Severity: normal

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In my effort to test my package cacti against php7.0 I found the following
regression. With php5 the page http://localhost/cacti/graphs_new.php works fine
and as expected, with php7.0 I get a 500 Internal Server error response due to
undefined function xml_parser_create. As far as I dived into this, php could
just support that and as the Debian package has done so for an extremely long
time, I think it is a regression not to do so with php7.0.

root at sid:~# wget $loadSaveCookie http://localhost/cacti/graphs_new.php--2016-04-08 20:57:19--  http://localhost/cacti/graphs_new.php
Resolving localhost (localhost)... ::1, 127.0.0.1
Connecting to localhost (localhost)|::1|:80... connected.
HTTP request sent, awaiting response... 500 Internal Server Error
2016-04-08 20:57:20 ERROR 500: Internal Server Error.

root at sid:~# tail -n1 /var/log/apache2/error.log 
[Fri Apr 08 20:57:20.116589 2016] [:error] [pid 22899] [client ::1:60646] PHP Fatal error:  Uncaught Error: Call to undefined function xml_parser_create() in /usr/share/cacti/site/lib/xml.php:29\nStack trace:\n#0 /usr/share/cacti/site/lib/data_query.php(81): xml2array('<interface>\\n\\t<n...')\n#1 /usr/share/cacti/site/graphs_new.php(686): get_data_query_array('6')\n#2 /usr/share/cacti/site/graphs_new.php(49): graphs()\n#3 {main}\n  thrown in /usr/share/cacti/site/lib/xml.php on line 29

root at sid:~# a2dismod php7.0
Module php7.0 disabled.
To activate the new configuration, you need to run:
  service apache2 restart
root at sid:~# a2enmod php5
Enabling module php5.
To activate the new configuration, you need to run:
  service apache2 restart
root at sid:~# service apache2 restart

<some calls to get the authentication into the cookie file>

root at sid:~# wget $loadSaveCookie http://localhost/cacti/graphs_new.php
- --2016-04-08 21:03:44--  http://localhost/cacti/graphs_new.php
Resolving localhost (localhost)... ::1, 127.0.0.1
Connecting to localhost (localhost)|::1|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: 'graphs_new.php.1'

graphs_new.php.1                       [ <=>                                                           ]  15.18K  --.-KB/s    in 0s      

2016-04-08 21:03:45 (93.9 MB/s) - 'graphs_new.php.1' saved [15546]


- -- System Information:
Debian Release: 8.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable'), (50, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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