How can debugging techniques like var_dump be used to troubleshoot issues related to URL validation and status code checking in PHP?

Issue: When troubleshooting URL validation and status code checking in PHP, var_dump can be used to inspect the variables containing the URL and status code values to identify any errors or unexpected behavior. Example PHP code snippet: 

$url = "https://example.com";
$status_code = 200;

// Validate URL
if (filter_var($url, FILTER_VALIDATE_URL)) {
    echo "Valid URL";
} else {
    echo "Invalid URL";
}

// Check status code
if ($status_code == 200) {
    echo "Status code is 200";
} else {
    echo "Status code is not 200";
}

// Debugging with var_dump
var_dump($url);
var_dump($status_code);

Keywords

var_dump debugging techniques URL validation status code checking PHP

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