Add throwable to php try/catch block snippet

[benjamenjohnsondev]

Add Throwable to try catch block snippet as requested:
3edd274#r30777567

[oneslash]

Since throwable is higher interface, next catch of exception will not be reached

[oneslash]

code should look like

try {
} catch(\Throwable $th) {
}

or

try {
} catch(\Exception $ex) {
} catch(\Error $err) {
}

Personally, I prefer first one

[benjamenjohnsondev]

Unreachable exception removed - user editable catch parameter added, this should cover most use cases - thanks for your help @oneslash

[roblourens]

Is this supposed to be $th?

[benjamenjohnsondev]

Oops! Changed 1de8905

[roblourens]

Thanks!