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数组函数大全函数的三要素1,功能2,参数3,返回子对我来说比较难的数组函数是-1,array_search:搜索数组中指定的值,返回其键名。(参数一:需要搜索的值;参数二:目标数组)-2,usort:自定义函数对目标数组的值进行排序(参数一:目标数组...