How to Fix \"PHP Startup: Unable to Load Dynamic Library\" Error in PHP5?

Troubleshooting "Error In PHP5..Unable to Load Dynamic Library"

When running the PHP -a command, you may encounter an error message like:

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626+lfs/curl.so' - /usr/lib/php5/20090626+lfs/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0

This error indicates that PHP is attempting to load dynamic extensions that are not present on your system.

Solution

1. Identify Loading Files

To identify the files responsible for loading these extensions, use the following command:

$ grep -Hrv ";" /etc/php5 | grep -E "extension(\s+)?="

2. Comment Out Loading Lines

In the output, locate the files that load the problematic extensions and comment out the corresponding extension lines by adding a semicolon (;) at the beginning:

# extension=curl.so

3. Disable Unnecessary Extensions

Only disable extensions that are not required for your specific setup. Installing additional unnecessary software is generally not recommended.

4. Example Modifications

For Ubuntu, the following modifications may be required:

• /etc/php5/conf.d/mcrypt.ini: Comment out extension=mcrypt.so
• /etc/php5/mods-available/curl.ini: Comment out extension=curl.so
• /etc/php5/mods-available/mysqli.ini: Comment out extension=mysqli.so
• /etc/php5/mods-available/mysql.ini: Comment out extension=mysql.so
• /etc/php5/mods-available/pdo.ini: Comment out extension=pdo.so
• /etc/php5/mods-available/pdo_mysql.ini: Comment out extension=pdo_mysql.so

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