SQLite3Result::fetchArray

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SQLite3Result::fetchArray — Obtener una fila de resultados en forma de un array asociativo o indexado o ambos

Descripción

public SQLite3Result::fetchArray(int $mode = SQLITE3_BOTH): array

Obtiene una fila de resultados en forma de un array asociativo o indexado o ambos. Por omisión, obtiene ambas formas.

Parámetros

mode

Controla cómo será devuelta al llamador la siguiente fila. Este valor debe ser uno de los siguientes: SQLITE3_ASSOC, SQLITE3_NUM, o SQLITE3_BOTH.

SQLITE3_ASSOC: devuelve un array indexado por el nombre de columna como devuelto en el conjunto de resultados correspondiente
SQLITE3_NUM: devuelve un array indexado por el número de columna como devuelto en el conjunto de resultados correspondiente, empezando por la columna 0
SQLITE3_BOTH: devuelve un array indexado tanto por el nombre como por el número de columna como devuelto en el conjunto de resultados correspondiente, empezando por la columna 0

Valores devueltos

Devuelve una fila de resultados en forma de un array asociativo o indexado o ambos. De forma alternativa devolverá false si no existen más filas.

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User Contributed Notes 4 notes

down

Jason ¶

10 years ago

Would just like to point out for clarification that each call to fetchArray() returns the next result from SQLite3Result in an array, until there are no more results, whereupon the next fetchArray() call will return false.

HOWEVER an additional call of fetchArray() at this point will reset back to the beginning of the result set and once again return the first result. This does not seem to explicitly documented, and caused me my own fair share of headaches for a while until I figured it out.

For example:

<?php 
        $returned_set = $database->query("select query or whatever");
        
        //Lets say the query returned 3 results
        //Normally the following while loop would run 3 times then, as $result wouldn't be false until the fourth call to fetchArray()
        while($result = $returned_set->fetchArray()) {
                //HOWEVER HAVING AN ADDITIONAL CALL IN THE LOOP WILL CAUSE THE LOOP TO RUN AGAIN
                $returned_set->fetchArray();
        }
?>

Basically, in the above code fetchArray will return:
1st call | 1st result from $returned_set (fetchArray() call from while condition)
2nd call | 2nd result  (fetchArray() call from while block)
3rd call | 3rd result  (fetchArray() call from while condition)
4th call |FALSE  (fetchArray() call from while block)
5th call | 1st result  (fetchArray() call from while condition)
....

This will cause (at least in this case) the while loop to run infinitely.

down

paule-panke at example dot com ¶

7 years ago

Check with SQLite3Result::numColumns() for an empty result before calling SQLite3Result::fetchArray().

In contrast to the documentation SQLite3::query() always returns a SQLite3Result instance, not only for queries returning rows (SELECT, EXPLAIN). Each time SQLite3Result::fetchArray() is called on a result from a result-less query internally the query is executed again, which will most probably break your application.
For a framwork or API it's not possible to know in before whether or not a query will return rows (SQLite3 supports multi-statement queries). Therefore the argument "Don't execute query('CREATE ...')" is not valid.

down

alan at synergymx dot com ¶

14 years ago

To loop through a record set: 



<?php

        $db = new SQLite3('auth.sqlite');



        $sql = "SELECT user_id, username, opt_status FROM tbl_user";



        $result = $db->query($sql);//->fetchArray(SQLITE3_ASSOC);



        $row = array();



        $i = 0;



         while($res = $result->fetchArray(SQLITE3_ASSOC)){



             if(!isset($res['user_id'])) continue;



              $row[$i]['user_id'] = $res['user_id'];

              $row[$i]['username'] = $res['username'];

              $row[$i]['opt_status'] = $res['opt_status'];



              $i++;



          }



          print_r($row);

?>

down

ghaith at cubicf dot net ¶

7 years ago

// Open a new sqlite3 DB

$db = new SQLite3('./DB_EHLH.db');

// select all information from table "algorithm"

$results= $db->query("select * from algorithm");

//Create array to keep all results
$data= array();

// Fetch Associated Array (1 for SQLITE3_ASSOC)
while ($res= $results->fetchArray(1))
{
//insert row into array
array_push($data, $res);

}

//you can return a JSON array
echo json_encode($data);

//the output is a s follows
[
{"id":1,"algorithm":"GA"},
{"id":2,"algorithm":"PSO"},
{"id":3,"algorithm":"IWO"},
{"id":4,"algorithm":"OIWO"}
]

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