UnreachableCatch

A catch block is unreachable because a more general exception type is caught before a more specific one. Exception types should be ordered from most specific to most general.

Example

<?php
try {
    // Some code
} catch (Exception $e) {
    // General catch
} catch (InvalidArgumentException $e) {
    // This is unreachable - Exception already caught
}

How to fix

Order catch blocks from most specific to most general:

<?php
try {
    // Some code
} catch (InvalidArgumentException $e) {
    // Specific catch first
} catch (Exception $e) {
    // General catch last
}