mysql_fetch_assoc
(PHP 4 >= 4.0.3)
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,
or FALSE if there are no more rows.
mysql_fetch_assoc() is equivalent to calling
mysql_fetch_array() with MYSQL_ASSOC for the
optional second parameter. It only returns an associative array.
This is the way mysql_fetch_array() originally
worked. If you need the numeric indices as well as the
associative, use mysql_fetch_array().
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.
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.
Пример 1. 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);
?> |
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See also
mysql_fetch_row(),
mysql_fetch_array(),
mysql_query(), and
mysql_error().