mysql_fetch_assoc
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 of strings 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 20.35. An expanded mysql_fetch_assoc
example
<?php $conn = mysql_connect('localhost', 'mysql_user', 'mysql_password'); if (!$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
PerformanceAn 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 the PHP NULL
value.
See Also
mysql_fetch_row
|
mysql_fetch_array
|
mysql_data_seek
|
mysql_query
|
mysql_error |