Failed to download pear within preferred state "stable" code example

Example 1: Failed to download pear within preferred state "stable"

$ pear install -f package_name-1.2.3

Example 2: Failed to download pear within preferred state "stable"

$ pear install -f package_name-beta

Example 3: Failed to download pear within preferred state "stable"

$ pear install -f package_name-alpha