php提取csv格式文件中的字符串出现的解决办法
php带csv格式的数据要用到fgetcsv()函数。
用这下面的语句
$hd=fopen('test.csv','r');
$buf=fgetcsv($hd,1000,',');
打开一个test.csv格式的文件,文件中的内容以","号分开。
取出的第一行代表自动含义,比如 id,messaget,time等等。
从第二行开始表示具体的数据,比如1,消息,12:00。
if($buf[1]=="some messages") echo "yes";
按理说从第二行开始,这条语句输出的结果应该为yes,但是尝试之后你会发现没有输出。
这是为什么呢?
可以用strlen()函数来比较$buf[1]与“消息”的长度。
比较的结果竟然是不相等。
天啊,怎么会出现这种问题呢?明明第二行$buf[1]取出来的值是“消息”啊,怎么会长度不一样呢?
这与你的csv格式文件的编码方式有关。
怎么解决这个问题呢?
先用php的字符编码检测函数mb_detect_encoding($buf[1],'UTF-8,EUC-CN,ASSII'),
如果取出来的编码格式为“EUC-CN”,那就哟个下面的语句将其转换为utf8的编码格式,
用php的字符转换函数mb_convert_encoding(),$res=mb_convert_encoding($buf[1],'UTF-8','EUC-CN')。
将转换的结果$res与字符串“消息”比较,这时可以发现,它们终于相等了。

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