fetch in PDO gets only one result [duplicate]

Answer 1

Fetch should be used to display next row from database result

To get all rows you should use fetchAll();

• PDOStatement::fetch — Fetches the next row from a result set
• PDOStatement::fetchAll() — Returns an array containing all of the result set rows

Change your example to:

 <?php
 $sql = new PDO('mysql:host=localhost;dbname=b','root','root');
 $f = $sql->query('select * from user');
 $f->setFetchMode(PDO::FETCH_ASSOC);
 print_r($f->fetchAll());
 ?>

or if you want use PDOStatement::fetch to

 <?php
 $sql = new PDO('mysql:host=localhost;dbname=b','root','root');
 $f = $sql->query('select * from user');
 while($row = $sth->fetch(PDO::FETCH_ASSOC))
 {
   print_r($row);
 }
 ?>

Answer 2

The fetch() method only returns a single record and sets the internal pointer to point to next record. You are expecting from this method what it cannot return.

Perhaps try a different method like fetchAll:

http://php.net/manual/en/pdostatement.fetchall.php

<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();

/* Fetch all of the remaining rows in the result set */
print("Fetch all of the remaining rows in the result set:\n");
$result = $sth->fetchAll();
print_r($result);
?>

Answer 3

PDOStatement:fetch only retrieves one record from a PDOStatement object (wherever it's pointer is) which is why you have to loop through fetch

Answer 4

$f->fetch() - Will get 1 row

$f->fetchAll() - Will get All rows

Answer 5

$f->fetch() moves the internal result pointer to the next value(if exists) thats why you get all the values when you call it in while();

Answer 6

In that case use fetchAll.

$result = $f->fetchAll();
print_r($result);