run-tests possible deprecate if explode input is false or null

[plusminmax]

php-src/run-tests.php

Line 870 in bd042a5

$extensionsNames = explode(',', shell_exec("$php_escaped $pass_options $info_params $no_file_cache \"$info_file\""));

explode() parameter #2 is string only
shell_exec() return string|false|null