mysqli_result::fetch_all
Putting multiple rows into an array:
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER by ID LIMIT 3";
$result = $mysqli->query($query);
while($row = $result->fetch_array())
{
$rows[] = $row;
}
foreach($rows as $row)
{
echo $row['CountryCode'];
}
/* free result set */
$result->close();
/* close connection */
$mysqli->close();
?>
mysqli_result::fetch_array
mysqli_fetch_array
(PHP 5)
mysqli_result::fetch_array -- mysqli_fetch_array — Fetch a result row as an associative, a numeric array, or both
Açıklama
Nesne yönelimli kullanım
Yordamsal kullanım
Returns an array that corresponds to the fetched row or NULL if there
are no more rows for the resultset represented by the
result parameter.
mysqli_fetch_array() is an extended version of the mysqli_fetch_row() function. In addition to storing the data in the numeric indices of the result array, the mysqli_fetch_array() function can also store the data in associative indices, using the field names of the result set as keys.
Bilginize: Bu işlevden dönen alan isimlerinin harf büyüklüklerinde değişiklik yapılmaz.
Bilginize: Bu işlev NULL alanlara PHP
NULLdeğerini atar.
If two or more columns of the result have the same field names, the last column will take precedence and overwrite the earlier data. In order to access multiple columns with the same name, the numerically indexed version of the row must be used.
Değiştirgeler
-
sonuç -
Sadece yordamsal tarz: mysqli_query(), mysqli_store_result() veya mysqli_use_result() işlevinden dönen bir sonuç kümesi tanıtıcısı.
-
resulttype -
This optional parameter is a constant indicating what type of array should be produced from the current row data. The possible values for this parameter are the constants
MYSQLI_ASSOC,MYSQLI_NUM, orMYSQLI_BOTH.By using the
MYSQLI_ASSOCconstant this function will behave identically to the mysqli_fetch_assoc(), whileMYSQLI_NUMwill behave identically to the mysqli_fetch_row() function. The final optionMYSQLI_BOTHwill create a single array with the attributes of both.
Dönen Değerler
Returns an array of strings that corresponds to the fetched row or NULL if there
are no more rows in resultset.
Örnekler
Örnek 1 Nesne yönelimli kullanım
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER by ID LIMIT 3";
$result = $mysqli->query($query);
/* numeric array */
$row = $result->fetch_array(MYSQLI_NUM);
printf ("%s (%s)\n", $row[0], $row[1]);
/* associative array */
$row = $result->fetch_array(MYSQLI_ASSOC);
printf ("%s (%s)\n", $row["Name"], $row["CountryCode"]);
/* associative and numeric array */
$row = $result->fetch_array(MYSQLI_BOTH);
printf ("%s (%s)\n", $row[0], $row["CountryCode"]);
/* free result set */
$result->free();
/* close connection */
$mysqli->close();
?>
Örnek 2 Yordamsal kullanım
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER by ID LIMIT 3";
$result = mysqli_query($link, $query);
/* numeric array */
$row = mysqli_fetch_array($result, MYSQLI_NUM);
printf ("%s (%s)\n", $row[0], $row[1]);
/* associative array */
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
printf ("%s (%s)\n", $row["Name"], $row["CountryCode"]);
/* associative and numeric array */
$row = mysqli_fetch_array($result, MYSQLI_BOTH);
printf ("%s (%s)\n", $row[0], $row["CountryCode"]);
/* free result set */
mysqli_free_result($result);
/* close connection */
mysqli_close($link);
?>
Yukarıdaki örneklerin çıktısı:
Kabul (AFG) Qandahar (AFG) Herat (AFG)
Ayrıca Bakınız
- mysqli_fetch_assoc() - Fetch a result row as an associative array
- mysqli_fetch_row() - Get a result row as an enumerated array
- mysqli_fetch_object() - Returns the current row of a result set as an object
- mysqli_query() - Performs a query on the database
- mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result
add a note
User Contributed Notes
mysqli_result::fetch_array - [3 notes]
Jammerx2 ¶
3 years ago
Duncan ¶
3 months ago
Note that the array returned contains only strings.
E.g. when a MySQL field is an INT you may expect the field to be returned as an integer, however all fields are simply returned as strings.
What this means: use double-equals not triple equals when comparing numbers.
<?php
print $array_from_mysqli_fetch_array['id'] == 1 ? "true" : "false"; // true
print $array_from_mysqli_fetch_array['id'] === 1 ? "true" : "false"; // false
?>
ahouston at gmail dot com ¶
1 year ago
Here is a function to return an associative array with multiple columns as keys to the array.
This is a rough approximation of the perl DBI->fetchall_hashref function - something I find myself using quite a bit.
Given a simple mySQL table:
mysql> select * from city;
+----------------+----------------+------------------+------------+
| country | region | city | hemisphere |
+----------------+----------------+------------------+------------+
| South Africa | KwaZulu-Natal | Durban | South |
| South Africa | Gauteng | Johannesburg | South |
| South Africa | Gauteng | Tshwane | South |
| South Africa | KwaZulu-Natal | Pietermaritzburg | South |
| United Kingdom | Greater London | City of London | North |
| United Kingdom | Greater London | Wimbledon | North |
| United Kingdom | Lancashire | Liverpool | North |
| United Kingdom | Lancashire | Manchester | North |
+----------------+----------------+------------------+------------+
*Note* - this is a simple function that makes no attempt to keep multiple values per key, so you need to specify all the unique keys you require.
<?php
$link = mysqli_connect("localhost", "username", "password", "test");
$result = mysqli_query($link, "select * from city");
$results_arr = fetch_all_assoc($result,array('hemisphere','country','region','city'));
function fetch_all_assoc(& $result,$index_keys) {
// Args : $result = mysqli result variable (passed as reference to allow a free() at the end
// $indexkeys = array of columns to index on
// Returns : associative array indexed by the keys array
$assoc = array(); // The array we're going to be returning
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
$pointer = & $assoc; // Start the pointer off at the base of the array
for ($i=0; $i<count($index_keys); $i++) {
$key_name = $index_keys[$i];
if (!isset($row[$key_name])) {
print "Error: Key $key_name is not present in the results output.\n";
return(false);
}
$key_val= isset($row[$key_name]) ? $row[$key_name] : "";
if (!isset($pointer[$key_val])) {
$pointer[$key_val] = ""; // Start a new node
$pointer = & $pointer[$key_val]; // Move the pointer on to the new node
}
else {
$pointer = & $pointer[$key_val]; // Already exists, move the pointer on to the new node
}
} // for $i
// At this point, $pointer should be at the furthest point on the tree of keys
// Now we can go through all the columns and place their values on the tree
// For ease of use, include the index keys and their values at this point too
foreach ($row as $key => $val) {
$pointer[$key] = $val;
}
} // $row
/* free result set */
$result->close();
return($assoc);
}
?>