How can debugging techniques be used to troubleshoot PHP scripts that are not functioning as expected?

Issue: To troubleshoot PHP scripts that are not functioning as expected, you can use debugging techniques such as printing out variables, using error reporting functions, and stepping through the code line by line. 

<?php
// Enable error reporting to display any errors or warnings
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Print out variables to check their values
$variable = 10;
echo $variable;

// Use die() or exit() to halt the script and see where the issue may lie
if ($variable < 5) {
    die("Variable is less than 5");
}

// Step through the code line by line using a debugger tool like Xdebug
// This allows you to see the state of variables at each step of execution

Keywords

Xdebug var_dump error_reporting stack trace breakpoints

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