如何在PHP/MySQL中使SELECT不区分大小写? [英] How to make a SELECT in PHP/MySQL case insensitive?

问题描述

她是我的问题，我想这真的很基本.

Her's my probleme, i guess its really basic.

我正在尝试在数据库中查找是否存在一行.这是我的代码:

I'm trying to lookup in the database if a line does exist. heres my code :

$req="SELECT * FROM INSTITUTS WHERE inst_name='$fc_inst'";
$result=mysql_query($req) or die ('Erreur :'.mysql_error());
if (mysql_num_rows($result)){
echo '  name exist';
}
else {
echo '  does not exist.';
}

问题是，当我寻找测试"时，即使我的数据库中有测试"，它也说不存在.

Probleme is, when imm looking for "test", it says does not exist, even if i have "Test" in my database.

推荐答案

您可以使用LIKE:

WHERE foo LIKE 'bar'

或者您可以将以下两个字母都转换为小写字母:

Or you can cast both lowercase with:

WHERE LOWER(foo) = LOWER("bar")

使用LOWER()的示例最有效，因为您知道数据库中的所有数据均已小写，然后可以执行:

The example with LOWER() is most effective where you know that all of your data in the database is already lower cased and then you can just execute:

WHERE foo = LOWER("bar")

如果可以小写数据库中的所有数据，则此价格比LIKE便宜.

This would be a cheaper comparison than the LIKE if you can lower case all of the data in your database.

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