How can debugging techniques be implemented in PHP to troubleshoot HTTP request failures and identify the root cause of issues?

To troubleshoot HTTP request failures in PHP and identify the root cause of issues, you can implement debugging techniques such as using error logging, checking for HTTP response codes, and inspecting the response data for errors. By logging errors and examining the response details, you can pinpoint where the issue lies and take appropriate actions to resolve it.

// Example code snippet for debugging HTTP request failures in PHP
$url = 'https://example.com/api';
$response = file_get_contents($url);

if ($response === false) {
    error_log("Failed to retrieve data from $url");
} else {
    $httpCode = substr($http_response_header[0], 9, 3);
    
    if ($httpCode != 200) {
        error_log("HTTP request failed with response code: $httpCode");
    } else {
        // Process the response data
        echo $response;
    }
}