Why am I getting an \"Unable to load dynamic library\" error in PHP5, and how can I fix it?

Unable to Load Dynamic Libraries in PHP5

When encountering the error "Unable to load dynamic library," such as faced with curl.so, mcrypt.so, mysql.so, mysqli.so, pdo.so, and pdo_mysql.so extensions, the root cause lies in missing dependencies.

Solution:

First, identify the files responsible for loading the extensions:

<code class="bash">grep -Hrv ";" /etc/php5 | grep -E "extension(\s+)?="</code>

For Ubuntu, this can generate output like:

/etc/php5/mods-available/gd.ini:extension=gd.so
/etc/php5/mods-available/pdo_sqlite.ini:extension=pdo_sqlite.so
/etc/php5/mods-available/pdo.ini:extension=pdo.so
/etc/php5/mods-available/pdo_mysql.ini:extension=pdo_mysql.so
/etc/php5/mods-available/mysqli.ini:extension=mysqli.so
/etc/php5/mods-available/mysql.ini:extension=mysql.so
/etc/php5/mods-available/curl.ini:extension=curl.so
/etc/php5/mods-available/sqlite3.ini:extension=sqlite3.so
/etc/php5/conf.d/mcrypt.ini:extension=mcrypt.so

Next, locate the files loading the problematic extensions and comment out those lines with a semicolon (;). For instance, in Ubuntu's default installation, commenting out the lines causing the errors should resolve the issue.

Additional software installation may be unnecessary as the focus should remain on resolving the underlying dependency issues.

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