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HomeBackend DevelopmentPHP Tutorial关于array_diff函数的问题

我用array_diff对比读取到的txt文件标题是否和我设定的一样,其中最后一个字段始终判定为不一样,表面看最后一个字段多了一个空格,我加了一个空格,也判定不一样,请问我用什么方法看txt文件最后一个字段的内容是什么??


回复讨论(解决方案)

把??txt??base64,再看看是否相同。

可以把你的代码粘贴出来吗???

需要看到你的代码和测试数据

private function CheckFileType($array){    $type="";    foreach($this->filetypearray as $name=>$value){        $ar=array_diff($array,$value);         if(empty($ar)){            $type=$name;        }       }    return $type;  }private   $filetypearray=array(                            'downloadfile'=>array('order-id','order-item-id','purchase-date','payments-date','buyer-email',                                                  'buyer-name','buyer-phone-number','sku','product-name','quantity-purchased','currency','item-price',                                                  'item-tax','shipping-price','shipping-tax','ship-service-level','recipient-name','ship-address-1',                                                  'ship-address-2','ship-address-3','ship-city','ship-state','ship-postal-code','ship-country',                                                  'ship-phone-number','delivery-start-date','delivery-end-date','delivery-time-zone',"delivery-Instructions ")   ); $order['28']='('.base64_encode($more[28]).')'; $order['29']='('.base64_encode($this->filetypearray['downloadfile'][28]).')';[28] => (ZGVsaXZlcnktSW5zdHJ1Y3Rpb25zDQ==)[29] => (ZGVsaXZlcnktSW5zdHJ1Y3Rpb25zIA==)

两个字段的base64结果,最后部分不一样

那个DQ==是什么??我不加空格编码就是ZGVsaXZlcnktSW5zdHJ1Y3Rpb25z

base64 编码的:
DQ== 是回车符 0x0d (chr(13))
IA== 是空格符 0x20 (chr(32))

一般情况下首尾的空白字符是可忽略的,所以宜 trim 一下
$ar = array_diff(array_map('trim', $array), array_map('trim', $value));

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