How can debugging techniques be applied in PHP to troubleshoot issues with loop iteration and variable values?

When troubleshooting loop iteration and variable value issues in PHP, you can use debugging techniques such as printing out variable values at different points in the loop, using tools like var_dump() or echo statements. This can help you identify where the issue lies and track the values of variables as the loop progresses. Additionally, you can use conditional statements to check if variables are being updated correctly within the loop.

// Example of debugging loop iteration and variable values in PHP

// Initialize a variable
$sum = 0;

// Loop to calculate the sum of numbers from 1 to 5
for ($i = 1; $i <= 5; $i++) {
    // Print out the current value of $i
    echo "Current value of i: " . $i . "<br>";

    // Add the current value of $i to the sum
    $sum += $i;

    // Print out the current value of $sum
    echo "Current sum: " . $sum . "<br>";
}

// Print out the final sum
echo "Final sum: " . $sum;