本文實例講述了PHP實現查詢兩個數組中不同元素的方法。分享給大家供大家參考，具體如下：
<?php $a = array( "max_allow_dialogs", "livechat_server_ip", "livechat_service_time", "abort_zh_cn", "abort_zh_tw", "abort_en_usa", "welcome_zh_cn", "welcome_zh_tw", "welcome_en_usa", "timeout_zh_cn", "timeout_zh_tw", "timeout_en_usa", "absence_zh_cn", "absence_zh_tw", "absence_en_usa" ); $b = array( "max_allow_dialogs", "livechat_server_ip", "livechat_service_time", "abort_zh_cn", "abort_zh_tw", "abort_en_usa", "welcome_zh_cn", "welcome_zh_tw", "welcome_en_usa", "timeout_zh_cn", "timeout_zh_tw", "timeout_en_usa", ); $c = array_merge(array_diff($a,$b),array_diff($b,$a)); print_r($c);?>
結果：
Array( [0] => absence_zh_cn [1] => absence_zh_tw [2] => absence_en_usa)
