fann_create_from_file() Ubuntu 16 上的未定义函数答案

【问题标题】：fann_create_from_file() undefined function on Ubuntu 16fann_create_from_file() Ubuntu 16 上的未定义函数
【发布时间】：2018-07-31 12:03:54
【问题描述】：

我在 Ubuntu 16 服务器上安装了 php fann (https://github.com/bukka/php-fann)，这是控制台输出：

sudo apt-get install libfann-*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libfann-dbg' for glob 'libfann-*'
Note, selecting 'libfann-dev' for glob 'libfann-*'
Note, selecting 'libfann-doc' for glob 'libfann-*'
The following NEW packages will be installed:
  libfann-dbg libfann-dev libfann-doc
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1,860 kB of archives.
After this operation, 14.2 MB of additional disk space will be used.
Selecting previously unselected package libfann-dev:amd64.
(Reading database ... 86590 files and directories currently installed.)
Preparing to unpack .../libfann-dev_2.2.0+ds-2_amd64.deb ...
Unpacking libfann-dev:amd64 (2.2.0+ds-2) ...
Selecting previously unselected package libfann-doc.
Preparing to unpack .../libfann-doc_2.2.0+ds-2_all.deb ...
Unpacking libfann-doc (2.2.0+ds-2) ...
Selecting previously unselected package libfann-dbg:amd64.
Preparing to unpack .../libfann-dbg_2.2.0+ds-2_amd64.deb ...
Unpacking libfann-dbg:amd64 (2.2.0+ds-2) ...
Setting up libfann-dev:amd64 (2.2.0+ds-2) ...
Setting up libfann-doc (2.2.0+ds-2) ...
Setting up libfann-dbg:amd64 (2.2.0+ds-2) ...

似乎没有错误，但是当我尝试调用 fann_create_from_file() 时，我得到：

Call to undefined function fann_create_from_file() in /var/www/html/../somefile.php on line XX

有什么问题吗？我正在使用 PHP 5.6，是否可以 apt-get 为较旧的（或其他）php 安装配置 lib fann？

更新 1

我也试过 sudo apt-get install libfann-dev

更新 2

Ubuntu 14

上的相同问题

sudo apt-get install libfann-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  libfann-doc
The following NEW packages will be installed:
  libfann-dev
0 upgraded, 1 newly installed, 0 to remove and 199 not upgraded.
Need to get 0 B/176 kB of archives.
After this operation, 703 kB of additional disk space will be used.
Selecting previously unselected package libfann-dev.
(Reading database ... 56278 files and directories currently installed.)
Preparing to unpack .../libfann-dev_2.1.0~beta~dfsg-8ubuntu1_amd64.deb ...
Unpacking libfann-dev (2.1.0~beta~dfsg-8ubuntu1) ...
Setting up libfann-dev (2.1.0~beta~dfsg-8ubuntu1) ...

跑步：

Call to undefined function fann_create_from_file

更新 3

我编译运行的“fann.so”库：

git clone --recursive https://github.com/bukka/php-fann.git
cd php-fann
phpize
./configure --with-fann
make
sudo make install

构建过程运行成功，所以我将“fann.so”添加到我的 PHP.ini 中，我得到了：

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20131226/fann.so' - /usr/lib/php/20131226/fann.so: undefined symbol: zend_list_close in Unknown on line 0

【问题讨论】：

标签： php apt-get fann

【解决方案1】：

我终于成功了：

sudo apt-get install libfann-dev
sudo apt-get install php5.6-dev
sudo apt-get install php-pear
sudo pecl install fann（这将构建正确版本的“fann.so”并将其放入 php 可访问文件夹中）
将以下行添加到 PHP.ini "extension=fann.so;"

【讨论】：