How can debugging tools like the DEBUG mode in PHP be utilized to troubleshoot issues related to variable handling in code?

When troubleshooting variable handling issues in PHP code, the DEBUG mode can be utilized to track the values of variables at different points in the code execution. By enabling DEBUG mode, developers can identify where variables are being set, modified, or accessed incorrectly, helping to pinpoint the root cause of the issue. 

// Enable DEBUG mode in PHP to track variable values
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

// Sample code snippet demonstrating variable handling issue
$var1 = 10;
$var2 = 20;

$result = $var1 + $var2;

// DEBUG mode output to track variable values
var_dump($var1);
var_dump($var2);
var_dump($result);

Keywords

DEBUG mode PHP debugging tools variable handling troubleshooting

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