PHP 启动：无法加载动态库 'cassandra.so' Ubuntu 18.04答案

【问题标题】：PHP Startup: Unable to load dynamic library 'cassandra.so' Ubuntu 18.04PHP 启动：无法加载动态库 'cassandra.so' Ubuntu 18.04
【发布时间】：2019-01-28 19:11:27
【问题描述】：

我已经在 Ubuntu 18.04 中从 apt-get 安装了 php-cassandra。

sudo apt-get install php-cassandra 

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  php-cassandra
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 3,892 B of archives.
After this operation, 21.5 kB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu bionic/universe amd64 php-cassandra amd64 1.3.0-1build1 [3,892 B]
Fetched 3,892 B in 0s (11.0 kB/s)        
Selecting previously unselected package php-cassandra.
(Reading database ... 256791 files and directories currently installed.)
Preparing to unpack .../php-cassandra_1.3.0-1build1_amd64.deb ...
Unpacking php-cassandra (1.3.0-1build1) ...
Setting up php-cassandra (1.3.0-1build1) ...

================================================ ==

php test_cass.php 

PHP Warning:  PHP Startup: Unable to load dynamic library 'cassandra.so' (tried: /usr/lib/php/20170718/cassandra.so (/usr/lib/php/20170718/cassandra.so: cannot open shared object file: No such file or directory), /usr/lib/php/20170718/cassandra.so.so (/usr/lib/php/20170718/cassandra.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP Fatal error:  Uncaught Error: Class 'Cassandra' not found in /home/prabhakarc/php_programs/test_cass.php:3
Stack trace:
#0 {main}
  thrown in /home/prabhakarc/php_programs/test_cass.php on line 3

提前致谢。

编辑：

test_cass.php 的内容：

<?php
  $cluster = new Cassandra::cluster()->withContactPoints('127.0.0.1')->build();
  $session = $cluster->connect("<Keyspace>");
  $statement = new Cassandra\SimpleStatement("SELECT * FROM <table>"); 
  $result = $session->execute($statement);
  echo "Result contains " . $result->count() . " rows"; ?> –

【问题讨论】：

你能用 test_cass.php 的前 5 行来编辑你的帖子吗？听起来您没有正确引用 Cassandra 库。
<?php $cluster = Cassandra::cluster()->withContactPoints('127.0.0.1')->build(); $session = $cluster->connect("<Keyspace>"); $statement = new Cassandra\SimpleStatement("SELECT * FROM <table>"); $result = $session->execute($statement); echo "Result contains " . $result->count() . " rows"; ?>

标签： php cassandra ubuntu-18.04

【解决方案1】：

试试这个：转到您的 php.ini 文件，查找 cassandra.so 并将其注释掉。您的 .ini 文件应位于 /etc/php/your-php-version/cli/php.ini 和 /etc/php/your-php-version/apache/php.ini 中。通过在前面添加分号来注释掉上述行，就像;extension=cassandra.so 一样。然后通过这样做sudo service apache2 restart重新启动apache。

【讨论】：

PHP 致命错误：未捕获的错误：在 /home/prabhakarc/php_programs/test_cass.php:3 中找不到类 'Cassandra' 堆栈跟踪：在 /home/prabhakarc/php_programs 中抛出 #0 {main} /test_cass.php 在第 3 行。一旦我在 /etc/php/7.2/cli/conf.d/20-cassandra.ini 中评论了该行，就会发出警告。
你的libcassandra.so.../usr/local/lib 或/usr/lib...在哪里？
[ cassandra.so 或 libcassandra.so ] /usr/local/lib 或 /usr/lib 中没有可用的文件。