Data from mysql is not getting retrieved on every page refresh - php

Question

Iam trying to fetch the random data from mysql database, but it only fetches the same row on page refresh
I tried to run the query to get the random single row data from mysql and display on the webpage using php, but it only retrieving only the same row every time
$sql = "SELECT * FROM identity_explorer_demographics ORDER BY RAND() LIMIT 1
<?php
$link = mysqli_connect("host", "username", "password", "db_name");
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
$sql = "SELECT * FROM identity_explorer_demographics ORDER BY RAND() LIMIT 1";
if($result = mysqli_query($link, $sql)){
if(mysqli_num_rows($result) > 0){
echo "<table>";
echo "<tr>";
echo "<th>email_md5</th>";
echo "<th>age_group </th>";
echo "<th>age</th>";
echo "<th>income</th>";
echo "<th>Income_group </th>";
echo "<th>gender</th>";
echo "</tr>";
while($row = mysqli_fetch_array($result)){
echo "<tr>";
echo "<td>" . $row['email_md5'] . "</td>";
echo "<td>" . $row['age_group'] . "</td>";
echo "<td>" . $row['age'] . "</td>";
echo "<td>" . $row['income'] . "</td>";
echo "<td>" . $row['Income_group'] . "</td>";
echo "<td>" . $row['gender'] . "</td>";
echo "</tr>";
}
echo "</table>";
// Free result set
mysqli_free_result($result);
} else{
echo "No records matching your query were found.";
}
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// Close connection
mysqli_close($link);
?>
I need the random row data to be displayed everytime the page is refreshed. Will really be helpful if anyone can suggest be the best solution.

Answer 1

$sql = "SELECT * FROM identity_explorer_demographics ORDER BY RAND()
LIMIT 1";
Change the line to
$randomv=rand(min,max);
$sql = "SELECT * FROM identity_explorer_demographics ORDER BY $randomv
LIMIT 1";
Here is my implementation in another case where I have to choose from a random id available - Yii 2 Framework
$prodcutids= \app\models\TblProduct::find()->all();
$targetproduct= ArrayHelper::map($prodcutids, 'id','id');
$productdetails= \app\models\TblProduct::findOne(['id'=>array_rand($targetproduct)]);
$productseriesname= \app\models\TblSeries::findOne(['id'=>$productdetails['Serie']]);
Or if you have an id column
$sql = "SELECT * FROM identity_explorer_demographics WHERE id=$randomv
LIMIT 1";
rand(min,max)
min specifies the lowest value that will be returned.
max specifies the highest value to be returned.

Answer 2

You mix it with PHP
$sql = 'SELECT * FROM `identity_explorer_demographics`';
//Perform query and parse result, E.G $sql = db::query($sql);
function getRandomRow($sql) {
$random_row = count(0, count($sql));
foreach($sql as $row => $result) {
if ($row == $random_row) {
return $row;
}
}
}