PHP, MySQL, Drupal, .htaccess, Robots.txt, Phponwebsites: mysql_fetch_array in php and mysql

31 Mar 2014

mysql_fetch_array in php and mysql

                        Mysql_fetch_array() returns row as an associative, numeric array or both based on parameters passed in it. Three types of parameters can be passed in mysql_fetch_array function.
                 
  1. MYSQL_BOTH - return both associative and numeric array
  2. MYSQL_ASSOC - return associative array
  3. MYSQL_NUM - return numeric array

Retrieve data from table using mysql_fetch_array() in php:


Consider following example:

                     mysql_fetch_array in php and mysql at phponwebsites

Mysql_fetch_array() with MYSQL_BOTH in php:

                       It returns  result as both associative and numeric array. You can retrieve data using both associative and numeric indices in php.

<html>
<body>
<table>
<th>Game_ID</th><th>Category</th><th>Title</th>
<?php
mysql_connect('localhost','root','')  or die(mysql_error());
mysql_select_db('new')  or die(mysql_error());
$query=mysql_query('select * from table1')  or die(mysql_error());
while($res=mysql_fetch_array($query, MYSQL_BOTH))
{
  echo'<tr><td>'.$res['game_ID'].'</td><td>'.$res[1].'</td><td>'.$res['game_Title'].'</td></tr>';
}
echo'<table>';
?>
</body>
</html>

         Now you'll get output like this:

 mysql_fetch_array with MYSQL_BOTH in php

Where,
          the array should be like this:

     Array(
                  [game_ID] => 1
                  [category_Name] => Adventures
                  [game_Title] => Achilles
               )
                        
                         OR

     Array(
                  [0] => 1
                  [1] => Adventures
                  [2] => Achilles
               )

mysql_fetch_array() with MYSQL_NUM in php:

                              It returns result as numeric array. ie, indices are numeric like 0,1,2...

<html>
<body>
<table>
<th>Game_ID</th><th>Category</th><th>Title</th>
<?php
mysql_connect('localhost','root','')  or die(mysql_error());
mysql_select_db('new')  or die(mysql_error());
$query=mysql_query('select * from table1')  or die(mysql_error());
while($res=mysql_fetch_array($query, MYSQL_NUM))
{
  echo'<tr><td>'.$res[0].'</td><td>'.$res[1].'</td><td>'.$res[2].'</td></tr>';
}
echo'<table>';
?>
</body>
</html>

           Now you'll get output like this:

mysql_fetch_array with MYSQL_NUM in php

In this type, the array of result should be like below:

     Array(
                  [0] => 1
                  [1] => Adventures
                  [2] => Achilles
               )


          Suppose you'll use
echo'<tr><td>'.$res[0].'</td><td>'.$res[1].'</td><td>'.$res['game_Title'].'</td></tr>';

That means you use associative index instead numerical, then you will get undefined index error like as follows as:

mysql, php at phponwebsites

mysql_fetch_array() with MYSQL_ASSOC in php:

                             It returns result as an associative array.


<html>
<body>
<table>
<th>Game_ID</th><th>Category</th><th>Title</th>
<?php
mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('new')  or die(mysql_error());
$query=mysql_query('select * from table1')  or die(mysql_error());
while($res=mysql_fetch_array($query,MYSQL_ASSOC))
 {
   echo'<tr><td>'.$res['game_ID'].'</td><td>'.$res['category_Name'].'</td><td>'.$res['game_Title'].'</td></tr>';
  }
 echo'<table>';
 ?>
</body>
</html>

           Now you'll get output like this:

mysql_fetch_array with MYSQL_ASSOC in php

Where,
            the array should be like this:
     Array(
                  [game_ID] => 1
                  [category_Name] => Adventures
                  [game_Title] => Achilles
               )


 Suppose you'll use
echo'<tr><td>'.$res[0].'</td><td>'.$res['category_Name'].'</td><td>'.$res['game_Title'].'</td></tr>';

That means you use numeric index instead associative, then you will get undefined offset error like as follows as:

mysql_fetch_assoc,php, mysql at phponwebsites


Note:
          mysql_fetch_array() without array_type means return row as an associative, numeric array or both

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