mysql_fetch_assoc -- Fetch a result row as an associative array
Description
array mysql_fetch_assoc ( resource result )
Returns an associative array that corresponds to the fetched row
and moves the internal data pointer ahead.
mysql_fetch_assoc() is equivalent to calling
mysql_fetch_array() with MYSQL_ASSOC for the
optional second parameter. It only returns an associative array.
Parameters
result
The result resource that
is being evaluated. This result comes from a call to
mysql_query().
Return Values
Returns an associative array that corresponds to the fetched row, or
FALSE if there are no more rows.
If two or more columns of the result have the same field names,
the last column will take precedence. To access the other
column(s) of the same name, you either need to access the
result with numeric indices by using
mysql_fetch_row() or add alias names.
See the example at the mysql_fetch_array()
description about aliases.
Examples
Example 1. An expanded mysql_fetch_assoc() example
if (!$conn) { echo "Unable to connect to DB: " . mysql_error(); exit; }
if (!mysql_select_db("mydbname")) { echo "Unable to select mydbname: " . mysql_error(); exit; }
$sql = "SELECT id as userid, fullname, userstatus FROM sometable WHERE userstatus = 1";
$result = mysql_query($sql);
if (!$result) { echo "Could not successfully run query ($sql) from DB: " . mysql_error(); exit; }
if (mysql_num_rows($result) == 0) { echo "No rows found, nothing to print so am exiting"; exit; }
// While a row of data exists, put that row in $row as an associative array // Note: If you're expecting just one row, no need to use a loop // Note: If you put extract($row); inside the following loop, you'll // then create $userid, $fullname, and $userstatus while ($row = mysql_fetch_assoc($result)) { echo $row["userid"]; echo $row["fullname"]; echo $row["userstatus"]; }
mysql_free_result($result);
?>
Notes
Performance:
An important thing to note is that using
mysql_fetch_assoc() is not
significantly slower than using
mysql_fetch_row(), while it
provides a significant added value.
Note: Field names returned by this function
are case-sensitive.
Note: This function sets NULL fields to
PHP NULL value.
