MAMP: How to upgrade PEAR

Question

When trying to upgrade MAMP pear the following error is raised:

Notice: unserialize(): Error at offset 276 of 1133 bytes in Config.php on line 1050 ERROR: The default config file is not a valid config file or is corrupted. 

Some suggestions how to fix this?

Steps to reproduce:

• Installed MAMP (version 2.0.5)
• cd /Applications/MAMP/bin/php/php5.3.6/bin
• sudo ./pear upgrade pear
• above mentioned error is thrown

Update (1):

Based on answer 8375349/420953 I tried 2 possibilities to fix this

• A: delete pear.conf
  • rm /Applications/MAMP/bin/php/php5.3.6/conf/pear.conf
• B: edit pear.conf
  • change "php_dir";s:44 to "php_dir";s:43

both resulted in error:

Could not get contents of package "/Applications/MAMP/bin/php/php5.3.6/bin/pear". Invalid tgz file. upgrade failed 

Update (2):

running

• which pear

results in output

• /usr/local/bin/pear

With this, I noticed that I was using the "local" version of PEAR.

I removed it with

• sudo pear uninstall pear

and then tried to upgrade the MAMP version of PEAR with

• /Applications/MAMP/bin/php/php5.3.6/bin/pear upgrade pear

this results in error

Cannot install, php_dir for channel "pear.php.net" is not writeable by the current user 

upgrading with

• sudo /Applications/MAMP/bin/php/php5.3.6/bin/pear upgrade pear

installs it locally (again).

running

• which pear

outputs

• /usr/local/bin/pear

this brings me back to the starting point of Update (2). Seems that I am not able to upgrade PEAR under a MAMP directory.

Update (3):

I posted question

• MAMP PEAR configuration is pointing to local directories

because my assumption is that the root of this issue is related to MAMP PEAR config.

Update (4):

I did not install a local PEAR version and this was causing quite some issues. After also installing a local version (and not only the MAMP) version, upgarding the MAMP version worked perfectly.

Answer 1

People with the your exact problem seem to has solved it in this MAMP forum thread.

You can either delete /Applications/MAMP/bin/php/php5.3.6/conf/pear.conf, or change a line in that file from "php_dir";s:44 to "php_dir";s:43.

Answer 2

Edit the pear.conf: Adding a forward slash "/" to the end of the php_dir path, while keeping the s:44 solved the problem for me and a couple coworkers.