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<?php interface MigrateIdMapInterface { const ROLLBACK_DELETE = 0; } function yep($map_row) { echo sprintf('%s yields %s%s', var_export($map_row, TRUE), var_export(($map_row['rollback_action'] ?? NULL) === MigrateIdMapInterface::ROLLBACK_DELETE, TRUE), \PHP_EOL); } yep([]); yep(NULL); yep(FALSE); yep('string'); yep(['rollback_action' => 0]);
Output for git.master, git.master_jit, rfc.property-hooks
array ( ) yields false NULL yields false false yields false 'string' yields false array ( 'rollback_action' => 0, ) yields true

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