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<?php var_dump( preg_replace('/[^A-Za-z0-9_\.\(\) ,]+/', '', trim('( if( refund.tr_refund_date IS NULL, 1, 0 ) ) DESC, refund.tr_refund_date')) );
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
string(73) "( if( refund.tr_refund_date IS NULL, 1, 0 ) ) DESC, refund.tr_refund_date"
preferences:
219.72 ms | 404 KiB | 243 Q