PDO dynamic Table column name [duplicate] - php

Question

This question already has an answer here:
How to get column names from PDO's fetchAll result?
(1 answer)
Closed 2 years ago.
I want to create table with PHP. I need to get the name of all column dynamically.
Something like this:
id name username email
. . . .
. . . .
. . . .
. . . .
My code is:
$query = "SELECT * FROM user";
$result = $connection -> prepare($query);
$result -> execute();
echo "<table border=1 width=100%>";
echo '<tr>';
foreach ($result -> fetch(PDO::FETCH_OBJ) as $key => $value)
{
echo "<th>$key</th>";
}
echo '</tr>';
foreach ($result -> fetchAll(PDO::FETCH_OBJ) as $value)
{
echo '<tr>';
echo "<td>".$value -> id."</td>";
echo "<td>".$value-> name."</td>";
echo "<td>".$value-> username."</td>";
echo "<td>".$value -> password."</td>";
echo "<td>".$value -> account."</td>";
echo '</tr>';
}
echo '</table>';
But I lose my first record in second foreach loop, when I fetch my all records.
In fact my first record is $value in the first foreach loop.I want to set that in TD tags, in the second foreach loop.

Answer 1

Try caching the results.
The problem you are having is ->fetch doesn't just grab the keys of the table - it grabs the first row AND the keys.
The following code should work for you :
$query = "SELECT * FROM user";
$result = $connection -> prepare($query);
$result -> execute();
// store results in memory
$headers = '<tr>';
$output = '<tr>';
foreach( $result->fetch(PDO::FETCH_OBJ) as $key=>$value ) {
$headers .= '<th>' . $key . '</th>';
$output .= '<td>' . $value . '</td>';
}
$headers .= '</tr>';
$output .= '</tr>';
foreach ($result -> fetchAll(PDO::FETCH_OBJ) as $value)
{
$output .= '<tr>'
. '<td>' . $value->id . '</td>'
. '<td>' . $value->name . '</td>'
. '<td>' . $value->username . '</td>'
. '<td>' . $value->password . '</td>'
. '<td>' . $value->account . '</td>'
. '</tr>';
}
$output = '<table border="1" width="100%">' . $output . '</table>';
// output result set (full table)
echo $output;
The above example takes all the result set and builds the table on the fly. Since it is storing to memory, this also has the advantage of processing much faster over echo on each partial html element. It outputs the table once it has finished building in a single echo.