php - Only insert if the value doesn't exist -

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+----+----------+-----------+ | id | gamertag | timestamp | +----+----------+-----------+

so have table above want insert gamertag if doesn't exist. how that?

$gamertag = "l rah l"; mysql_query("insert `gamertags`(`gamertag`)values ('".$gamertag."')");

you should both things: create unique index on column gamertag and use insert ignore.

the unique index prevents duplicate row being added.

the insert ignore prevents mysql issuing warning when duplicate row not added.


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