<?php $skus = array('55A_3', '345W_1+04B_1', '128T_2+167T_2+113T_8+115T_8', '55A'); foreach ($skus as &$sku) { $sku = preg_replace('/(\d+)([A-Z]+)(?=_\d+|\+|$)/', '$2$1', $sku); } print_r($skus);
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Value for `_results` contains invalid data `array`