What are the common reasons for PHP buttons to stop working after a version upgrade?

Common reasons for PHP buttons to stop working after a version upgrade include changes in syntax or deprecated functions in the newer PHP version. To solve this issue, you should update your code to adhere to the new PHP version's requirements and standards. 

// Example code snippet to fix PHP button issue after version upgrade
<?php
// Old code using deprecated function
// Deprecated function: mysql_query()
// New code using mysqli_query() instead of mysql_query()
$conn = mysqli_connect("localhost", "username", "password", "database");

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "INSERT INTO table (column1, column2) VALUES ('value1', 'value2')";

if (mysqli_query($conn, $sql)) {
    echo "Record inserted successfully";
} else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

mysqli_close($conn);
?>

Keywords

PHP buttons version upgrade compatibility functionality

Related Questions