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MDB_Common::fetchCol() -- Fetch a single column


require_once 'MDB.php';

array &fetchCol (resource $result, mixed [$colnum = 0])


Fetch a single column from a result set of a result set and free the result set.


resource $result

a valid resource returned by query() or executeQuery()

array $params

if supplied, prepareQuery()/ executeQuery() will be used with this array as execute parameters

mixed $colnum

which column to return (integer [column number, starting at 0] or string [column name])

Return value

array - the first row of results as an array indexed from 0 or a MDB_Error, if fail


Table 39-1. Possible PEAR_Error values

Error codeError messageReasonSolution
MDB_ERROR_TRUNCATED NULL The result set contains fewer then two columns Check the SQL query or choose another query*() function
every other error code  Database specific error Check the database related section of PHP-Manual to detect the reason for this error. In the most cases a misformed SQL statement. Ie. using LIMIT in a SQL-Statement for an Oracle database.


This function can not be called statically.


query() , limitQuery() , prepareQuery() , executeQuery() , fetchRow() , fetchOne() , fetchAll()

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