PHP : Fetching data and storing into variables - php

Question

I wanted to fetch the data from the database and wants to store into an array and after storing the data into the array i want to access particular index of the array.
I'm a java developer need to do this in php (which I don't know much).
Basically there are 250 strings in a table i wanted to fetch those 250 strings into and array and wants to access some particular row.
for example :
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT * FROM Persons");
echo "<table border='1'>
<tr>
<th>Firstname</th>
<th>Lastname</th>
</tr>";
while($row = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['LastName'] . "</td>";
echo "</tr>";
}
echo "</table>";
**$uname100 = $row[100]; // this is not getting assigned to $uname100 variable**
**echo $row[100]; // here this is not printing**
**echo $uname100; // not even this printing**
mysqli_close($con);
?>
Please check the bold part in the code and help me out. I'm new to php so please dont panic over this.
And also wanted to do something like this :
$ctr=0;
while($row = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['LastName'] . "</td>";
echo "</tr>";
$uname[$ctr++] = $row['FirstName']; // AND USING THIS OUTSIDE LOOP
}
echo $uname[90];

Answer 1

Use array construction
$counter=0;
$data = array();
while($row = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['LastName'] . "</td>";
echo "</tr>";
$data[] = $row['FirstName'];
$counter++;
}
print_r($data);

Answer 2

First solution
$counter=0;
while($row = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['LastName'] . "</td>";
echo "</tr>";
$counter++;
$varName='uname'.$counter;
$$varName=$row['FirstName'];
}
echo echo $uname100;

Answer 3

You cannot access the variable $row[100] outside the while loop.
Also $row will not contain an index 100.
It will be containing only $row['FirstName'] or $row['LastName'] inside the while loop
Answer for second part:
$uname = array();
$ctr=0;
while($row = mysqli_fetch_array($result)) {
....
....
$uname[$ctr++] = $row['FirstName']; // AND USING THIS OUTSIDE LOOP
}
if(isset($uname[90])) echo $uname[90];