How to make a SELECT in PHP/MySQL case insensitive?

Question

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

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

$req=\"SELECT * FROM INSTIT         


        

Answer 1

It could also be a problem with your table COLLATE setting

This CREATE statement will force your select queries to be case sensitive even when using LIKE operators:

CREATE
  table instituts (inst_name VARCHAR(64))
  CHARACTER SET latin1 COLLATE latin1_general_cs;

Whereas this one will ensure case-insensitivity:

CREATE
  table instituts (inst_name VARCHAR(64))
  CHARACTER SET latin1

Answer 2

you can solve it using "LIKE" as other people told you, BUT it is important to know that the case sensitivity is determined by the collation in the database. For example if you select a collation utf8_general_ci... that "ci" at the end means "case insensitive" so the comparisons you do in the future will be case insensitive.

In a few words: you have to be careful about the collation you select.

Answer 3

Try using LIKE instead of =:

$req="SELECT * FROM INSTITUTS WHERE `inst_name` LIKE '$fc_inst'";

Answer 4

Try:

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

Answer 5

You can use a MD5() comparison if you want a case sensitive select:

$req="SELECT * FROM INSTITUTS WHERE MD5(inst_name)=MD5('$fc_inst')";

of course you consume a little bit of the server's cpu but it's rather simpler than those boring collations.

Answer 6

You can use LIKE BINARY in your query..

Like this:

SELECT * FROM table_name WHERE column_name LIKE BINARY 'search_string'

this will check "search_string" data in case sensitive