odbc_fetch_array
(PHP 4 >= 4.0.2, PHP 5, PHP 7)
odbc_fetch_array — Fetch a result row as an associative array
Описание
array odbc_fetch_array
( resource
$result
[, int $rownumber
] )Fetch an associative array from an ODBC query.
Список параметров
-
result -
The result resource from odbc_exec().
-
rownumber -
Optionally choose which row number to retrieve.
Возвращаемые значения
Returns an array that corresponds to the fetched row, or FALSE if there
are no more rows.
Примечания
Замечание: This function exists when compiled with DBMaker, IBM DB2 or UnixODBC support.
Смотрите также
- odbc_fetch_row() - Fetch a row
- odbc_fetch_object() - Fetch a result row as an object
- odbc_num_rows() - Number of rows in a result
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Коментарии
This is a quick and dirty way to accomplish the same thing:
<?
while(odbc_fetch_row($result)) {
$var1 = odbc_result($result, "NAMEOFFIELD1");
$var2 = odbc_result($result, "NAMEOFFIELD2");
..... //as many vars as you have fields with data to capture
$array_of_results[] = compact('var1', 'var2','var3', etc, etc)
}
?>
Just turn each returned row's data into variables then use the compact(). Turns each variable name into a key and the vars value into the array value. Makes a wonderful 2d array that you can walk easily and still use key values to get at data.
This function is badly implemented, because the fetch_array versions for all other databases are storing the values as associative AND numeric key.This one only stores as associative key :(
Someone should really cleanup the complete database api design!
Heya,
After much fiddling around with the odbc_num_rows() function, and trying to get odbc_fetch_array() to play nice with it, I decided to write this little function which will return a 2-dimensional array, in the format [rownumber][field].
The 'rownumber' array index is obviously the number of the row stored in the array.
The 'field' index is keyed to the field name on that row.
--Function--
<?
function fetch2DArray($res){
$i = 0;
$j = 0;
$toReturn = "";
while(odbc_fetch_row($res))
{
for ($j = 1; $j <= odbc_num_fields($res); $j++)
{
$field_name = odbc_field_name($res, $j);
$ar[$field_name] = odbc_result($res, $field_name);
}
$toReturn[$i] = $ar;
$i++;
}
return $toReturn;
}
?>
I then took this one stage further.. and wrote a whole class to deal with the odbc connection... it's a bit slap-happy, but it does work well enough.
-- Class --
<?
class odbcConnection{
var $user; //Username for the database
var $pass; //Password
var $conn_handle; //Connection handle
var $temp_fieldnames; //Tempory array used to store the fieldnames, makes parsing returned data easier.
function odbcConnection(){
$this->user = "";
$this->pass = "";
}
function connectDatabase($dsn_link,$user,$pass){
$handle = @odbc_connect($dsn_link,$user,$pass,SQL_CUR_USE_DRIVER) or die("<B>Error!</B> Couldn't Connect To Database. Error Code: ".odbc_error());
$this->conn_handle = $handle;
return true;
}
function runStoredQuery($query, $returns_results){
if($returns_results == false){
return false;
}
$toReturn = "";
$res = @odbc_exec($this->conn_handle, "exec ".$query."") or die("<B>Error!</B> Couldn't Run Stored Query. Error Code: ".odbc_error());
unset($this->temp_fieldnames);
$i = 0;
$j = 0;
while(odbc_fetch_row($res))
{
//Build tempory
for ($j = 1; $j <= odbc_num_fields($res); $j++)
{
$field_name = odbc_field_name($res, $j);
$this->temp_fieldnames[$j] = $field_name;
$this->temp_fieldnames[$j];
$ar[$field_name] = odbc_result($res, $field_name);
}
$toReturn[$i] = $ar;
$i++;
}
return $toReturn;
}
function runSQL($query,$returns_results){
$toReturn = "";
$res = @odbc_exec($this->conn_handle,$query) or die("<B>Error!</B> Couldn't Run Query. Error Code: ".odbc_error());
unset($this->temp_fieldnames);
if($returns_results == false){
return false;
}
$i = 0;
$j = 0;
while(odbc_fetch_row($res))
{
//Build tempory
for ($j = 1; $j <= odbc_num_fields($res); $j++)
{
$field_name = odbc_field_name($res, $j);
$this->temp_fieldnames[$j] = $field_name;
$ar[$field_name] = odbc_result($res, $field_name);
}
$toReturn[$i] = $ar;
$i++;
}
return $toReturn;
}
}
//And an example of how to use the class:
include("dbClass.inc"); //Where dbClass.inc is the name of the file holding the class
//Declare a new instance of the class
$dbConnection = new odbcConnection;
$dsn = "GroupWork"; //Your System DSN name to point to your database
$dbConnection->connectDatabase($dsn,"",""); //No username and password - read only access
echo"<BR><HR><B>Testing SQL</b><BR><BR>";
$query_result = $dbConnection->runSQL("SELECT * FROM Event WHERE Type = 'Sport' ORDER BY EDate ASC",true);
if(!$query_result)
{
//No Results - Your Error Code Here
}else{
//Get the results
$key = $dbConnection->temp_fieldnames;
$rows = count($query_result);
$keys = count($key);
$i = 0;
while($i < $rows){
$j = 1;
echo "Echoing Row $i:<BR>";
while($j < $keys - 1){
//$query_result[row][field];
$result = $query_result[$i][$key[$j]];
$field = $key[$j];
echo("Field <b>'".$field."'</b> : ".$result." <BR>");
$j++;
}
echo "<BR>----<BR><BR>";
$i++;
}
}
?>
Hope this was of some help. If anyone has any improvments to the class, please drop them by me.
I really liked Ryan's example so I took it another step and added a recordset class to work with the connection class. I made slight alterations to the original code as well. Also note the recordset class takes advantage of php5's __get property function...
<%
class odbcRecordset {
var $recordcount;
var $currentrow;
var $eof;
var $recorddata;
var $query;
function odbcConnection(){
$this->recordcount = 0;
$this->recorddata = 0;
}
function SetData( $newdata, $num_records, $query ) {
$this->recorddata = $newdata;
$this->recordcount = $num_records;
$this->query = $query;
$this->currentrow = 0;
$this->set_eof();
}
function set_eof() {
$this->eof = $this->currentrow >= $this->recordcount;
}
function movenext() { if ($this->currentrow < $this->recordcount) { $this->currentrow++; $this->set_eof(); } }
function moveprev() { if ($this->currentrow > 0) { $this->currentrow--; $this->set_eof(); } }
function movefirst() { $this->currentrow = 0; set_eof(); }
function movelast() { $this->currentrow = $this->recordcount - 1; set_eof(); }
function data($field_name) {
if (isset($this->recorddata[$this->currentrow][$field_name])) {
$thisVal = $this->recorddata[$this->currentrow][$field_name];
} else if ($this->eof) {
die("<B>Error!</B> eof of recordset was reached");
} else {
die("<B>Error!</B> Field <B>" . $field_name . "</B> was not found in the current recordset from query:<br><br>$this->query");
}
return $thisVal;
}
function __get($field_name) {
return $this->data($field_name);
}
}
class odbcConnection {
var $user; //Username for the database
var $pass; //Password
var $conn_handle; //Connection handle
var $temp_fieldnames; //Tempory array used to store the fieldnames, makes parsing returned data easier.
function odbcConnection(){
$this->user = "";
$this->pass = "";
}
function open($dsn,$user,$pass){
$handle = @odbc_connect($dsn,$user,$pass,SQL_CUR_USE_ODBC) or
die("<B>Error!</B> Couldn't Connect To Database. Error Code: ".odbc_error());
$this->conn_handle = $handle;
return true;
}
function &execute($query){
//Create a temp recordset
$newRS = new odbcRecordset;
$thisData = "";
$res = @odbc_exec($this->conn_handle,$query) or
die("<B>Error!</B> Couldn't Run Query:<br><br>" . $query . "<br><br>Error Code: ".odbc_error());
unset($this->temp_fieldnames);
$i = 0;
$j = 0;
$num_rows = 0;
// only populate select queries
if (stripos($query, 'select ') !== false) {
while(odbc_fetch_row($res)) {
$num_rows++;
//Build tempory
for ($j = 1; $j <= odbc_num_fields($res); $j++) {
$field_name = odbc_field_name($res, $j);
$this->temp_fieldnames[$j] = $field_name;
$ar[$field_name] = odbc_result($res, $field_name) . "";
}
$thisData[$i] = $ar;
$i++;
}
}
//populate the recordset and return it
$newRS->SetData( $thisData, $num_rows, $query );
return $newRS;
}
}
%>
usage is pretty simple:
<%
$con = new odbcConnection
$con->open("dsn","user","pass")
$sql = "select bar from foo";
$rs = $con->execute($sql);
if (!$rs->eof) {
print $rs->data("bar");
// or //
print $rs->bar;
}
while (!$rs->eof) {
// blah blah code
$rs->movenext();
}
%>
Works pretty well, but I haven't thoughly tested it yet.
Code can be dl'd here:
http://www.russprince.com/odbc_functions.zip
Cheers,
Russ
In response to Sena's post, odbc_num_rows does not always return a row count. When executing a query on MS Access it seems to return a row count of -1.
<?php
while(odbc_num_rows($myodbcexec)){
$myarray[] = odbc_fetch_array($myodbcexec);
}
?>
Just something to watch out for when attempting to execute this code.
Miles Phillips
e-Clipse Consulting
This function requires one of the following to exist: Windows, DB2, or UNIXODBC.I use this function to get my recordset in an array, and it's very easy to use.
function dbquery($sql) {
$arr = array();
$conn = odbc_connect('dsn','user','pass');
$rs = odbc_exec($conn,$sql);
$x = 1;
while (odbc_fetch_row($rs)) {
for ($y = 1; $y <= odbc_num_fields($rs); $y++)
$arr[$x][$y] = odbc_result($rs,$y);
$x++;
}
if ($x > 1)
return $arr;
}
usage:
$arr=dbquery("SELECT * FROM tblTable");
echo $arr[1][1] //echo's first column of the first row
Depending on the odbc driver/operating system you are using, odbc_fetch_array might not be defined. (ie if you used --with-custom-odbc you may be out of luck). The following can be safely added to define the odbc_fetch_array function if doesn't exist already. Unlike some of the other examples contributed here, this one will create the numeric keys and the text keys. This function is definitely not very optimal because it has to check the number of fields and field names each time a row is pulled. Often you will be looping through a result set and there is no need to pull this information each time. It could probably be improved by caching the result of these functions but I'll leave that as an exercise for someone else... :)
if(!function_exists("odbc_fetch_array"))
{
function odbc_fetch_array($res)
{
// make sure to pass back the false if we are out of rows
if(!odbc_fetch_row($res)) return false;
$row=array();
// populate the row array
$numfields=odbc_num_fields($res);
for($i=1; $i<=$numfields; $i++)
{
//odbc starts its indice at 1 but since I am
// trying to emulate the functionality of *_fetch_array
// for other dbs (ie mysql) I'm going to decrement my
// my numeric indice by 1. This might not be what
// you are after in which case get rid of the -1
$row[odbc_field_name($res,$i)]=$row[$i-1]=odbc_result($res,$i);
}
return $row;
}
}
I am using MS SQL Server 2005, and using odbc_connect with SQL_CUR_USE_ODBC.
I had a problem with odbc_fetch_array when getting results from a stored procedure that returns a text column. The misleading error I got was:
odbc_fetch_array() [function.odbc-fetch-array]: SQL error: [Microsoft][ODBC Cursor Library] Result set was not generated by a SELECT statement, SQL state SL004 in SQLGetData
Eventually I found that by converting the text column in my database to varchar(8000), it worked fine. Perhaps using CONVERT or CAST might have worked too. I also found that varchar(max) columns were scrambled.
On IBM DB2 for iSeries I have to specify a specific row number to retrieve. If I don't specify the row number, the behavior is erratic.
This seems to work:
<?php
for($i=1;$row=odbc_fetch_row($result,$i);$i++) {
//use $row
}
?>
The row count MUST start at 1 or else the behavior seems undefined; i.e., when I start from 0 some rows might be returned two or more times or not at all.
I found the function submitted by jezndiatyahoodotcodotuk to be very helpful. I'm using PHP 5.2.5 and this function isn't defined, so it may depend on the ODBC driver being used.
The only problem with the solution already posted is that the return values don't match the ones specified by the documentation. I made the following modification so that the function will work the same whether it exists internally or not:
<?php
if (!function_exists('odbc_fetch_array')) {
function odbc_fetch_array($result, $rownumber=null) {
$array = array();
if (!($cols = odbc_fetch_into($result, $result_array, $rownumber))) {
return false;
}
for ($i = 1; $i <= $cols; $i++) {
$array[odbc_field_name($result, $i)] = $result_array[$i - 1];
}
return $array;
}
}
?>
I use an odbc connection to a mssql2000 db. As long as I had set ansi_warnings on, I occasionnally got the last record twice when retrieving them with odbc_fetch_array or odbc_fetch_row and odbc_result.Some interesting behavior was discovered while attempting simultaneous queries to a MS SQL server through the ODBC/freeTDS layer on SUSE on a persistent connection with ODBC cursors enabled. Stepping through the first resource with odbc_fetch_array() in a while loop works as expected, but calls to subsequently created resources within that loop were failing to return data where MySQL equivalents to the script were working just fine.
I found that adding a num_rows function call [custom function that simply steps through the result set... the misbehavior of odbc_num_rows() is another matter] immediately following each odbc_exec() then resetting the cursor seemed to cache the results for proper performance of the multiple active result sets. It may be slightly slower than the MySQL equivalent, but at least it works.
Be careful while using this function with MSSQL for fetching results of SQL queries like following: "SELECT * FROM table". In this case array will NOT contain named indexes!
I.e.:
Table:
------------------------
| col1 | col2 | col3 |
------------------------
| 1 | 2 | 3 |
------------------------
| 4 | 5 | 6 |
------------------------
Code:
---------------------
<?php
$query = "SELECT * FROM table";
$res = odbc_exec($query);
while( $row = odbc_fetch_array($res) ) {
print_r($row);
}
?>
---------------------
Output will be:
---------------------
Array(
[0] => 1,
[1] => 2,
[2] => 3
)
Array(
[0] => 4,
[1] => 5,
[2] => 6
)
---------------------
No field names here!
I've found an issue while working with php ODBC functions. odbc_fetch_array and odbc_fetch_object fail when query has a join with a table that has the same column name, even when that certain field is excluded from the field selection (With SQL SERVER):
THIS ONLY HAPPENS WHEN USING SQL_CUR_USE_ODBC
for example
$con = odbc_connect("Driver={SQL Server Native Client 11.0};Server=$serverName;Database=$db;", 'user', 'pass',SQL_CUR_USE_ODBC);
$query="SELECT table1.field1, table1.field2 from table1 JOIN table2 ON table1.field1=table2.field1";
$result = odbc_exec($con,$query);
$a=odbc_fetch_array($result);
the code above generates a warning:
Warning: odbc_fetch_array() [function.odbc-fetch-array]: SQL error: [Microsoft][SQL Server Native Client 10.0][SQL Server]the column name '' is ambiguous., SQL state 37000 in SQLGetData
The error would be okay if i had selected field1 without specifying from which table, but even when it is explicit it doesn't work. the only "workaround" i've found so far is to remove the field from the selected fields or changinf the field name from the second table
I tried with: both SQL Server Native Client 10.0 and SQL Server Native Client 11.0 SQL server 2008 Php 5.3.2 over Windows
PD: If someone has any aideas without using sqlsrv or mssqL extension it will be great
This function can also return 'false' if there was a row with corrupt data (eg bad binary data or invalid locale data) depending on what ODBC driver you're connecting to. Subsequent calls to odbc_fetch_array() will still return results in those cases.
Either compare the number of rows fetched using the odbc_num_rows() function (if the driver provides such data), or verify that there's not some extra data after the failing rowduring your while loops:
<?php
// Allow for up to two sequential rows of bad/corrupt data
while(($row = odbc_fetch_array($res)) || ($row = odbc_fetch_array($res)) || ($row = odbc_fetch_array($res))) {
var_dump($row);
}
?>
Seen in the wild when using PHP's ODBC to talk to Informix and Foxpro databases.