Why is my PHP MySQL connection failing with 'No such file or directory' and how can I fix it using symbolic links?

Error: Unable to Establish MySQL Connection through Unix Socket

Upon attempting to connect to your MySQL database via the Terminal on your Mac using PHP, you encounter the following error:

Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.sock) in

This error indicates an issue with the MySQL socket file, which is used for UNIX-based connections to the database.

Solution: Create a Symbolic Link

The root cause of this issue is a discrepancy in the socket file's location on macOS. To resolve it, you need to create a symbolic link, which is a file that points to another file. This will allow your Mac to find the required socket file even if it's looking in the wrong place.

Steps:

Check Socket File Location

Use the following command to determine the location of the socket file:

ls -l /tmp/mysql.sock /var/mysql/mysql.sock

Create Symbolic Link

Depending on the location of the socket file, you will need to create a symbolic link as follows:

• If you have /tmp/mysql.sock but not /var/mysql/mysql.sock:

cd /var 
sudo mkdir mysql
sudo chmod 755 mysql
cd mysql
sudo ln -s /tmp/mysql.sock mysql.sock

• If you have /var/mysql/mysql.sock but not /tmp/mysql.sock:

cd /tmp
ln -s /var/mysql/mysql.sock mysql.sock

Note: You may need to use sudo before the commands to gain sufficient permissions.

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