<?php $str = "device_id=LA14011269&card_number=1073741835&mpb=1000&trans_time=1429443693&sessionId=1073741835LA140112691429443693&checksum=4"; echo checkBcc($str,4); function checkBcc($str, $check_sum) { $i=0; $checksum = 0; $result = false; $len = strlen($str); echo " str:".$str; $pBuf = explode($str); print_r($pBuf); for ($i = 0; $i < $len-2; $i++) { $checksum ^= $pBuf[$i]; } echo "checksum:". $checksum; if ($checksum == $check_sum) { $result = true; } return $result; } ?>
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