What debugging techniques can be used to identify issues with PHP scripts that fail to execute expected actions, such as deleting database entries?

One debugging technique to identify issues with PHP scripts that fail to execute expected actions, such as deleting database entries, is to use error reporting functions like error_reporting(E_ALL) and ini_set('display_errors', 1) to display any errors or warnings that may be occurring during script execution. Additionally, using functions like var_dump() or print_r() to output the values of variables and database queries can help pinpoint where the issue is occurring in the code. Lastly, checking the database connection and query syntax for errors can also help resolve issues with deleting database entries. 

<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Delete database entries
$sql = "DELETE FROM table_name WHERE id = 1";
if ($conn->query($sql) === TRUE) {
    echo "Record deleted successfully";
} else {
    echo "Error deleting record: " . $conn->error;
}

// Close the database connection
$conn->close();
?>

Keywords

Xdebug var_dump error_reporting PHP error logs database queries

Related Questions