Add $camelCase naming convention migration script; Update examples to use $camelCase naming convention

examples/gmail_send_email.php

@@ -75,6 +75,6 @@ if (isset($_GET['code'])) {
         'approval_prompt' => 'force',
     ));
 
-    $url = $curl->response_headers['Location'];
+    $url = $curl->responseHeaders['Location'];
     echo '<a href="' . $url . '">Continue</a>';
 }

examples/google_plus_profile.php

@@ -62,6 +62,6 @@ if (isset($_GET['code'])) {
         'approval_prompt' => 'force',
     ));
 
-    $url = $curl->response_headers['Location'];
+    $url = $curl->responseHeaders['Location'];
     echo '<a href="' . $url . '">Continue</a>';
 }

examples/instagram_popular_media.php

@@ -28,7 +28,7 @@ if (isset($_GET['code'])) {
     ));
 
     if ($curl->error) {
-        echo $curl->response->error_type . ': ' . $curl->response->error_message . '<br />';
+        echo $curl->response->error_type . ': ' . $curl->response->errorMessage . '<br />';
         echo '<a href="?">Try again?</a>';
         exit;
     }

examples/multi_curl_get_callbacks.php

@@ -13,8 +13,8 @@ $multi_curl->success(function($instance) {
 });
 $multi_curl->error(function($instance) {
     echo 'call to "' . $instance->url . '" was unsuccessful.' . "\n";
-    echo 'error code: ' . $instance->error_code . "\n";
-    echo 'error message: ' . $instance->error_message . "\n";
+    echo 'error code: ' . $instance->errorCode . "\n";
+    echo 'error message: ' . $instance->errorMessage . "\n";
 });
 $multi_curl->complete(function($instance) {
     echo 'call completed' . "\n";

examples/upload_file.php

@@ -11,7 +11,7 @@ $curl->post('https://httpbin.org/post', array(
 ));
 
 if ($curl->error) {
-    echo 'Error: ' . $curl->error_message . "\n";
+    echo 'Error: ' . $curl->errorMessage . "\n";
 } else {
     echo 'Success' . "\n";
 }

scripts/v4_migration.php

@@ -0,0 +1,93 @@
+<?php
+
+// Migrate pre-4.x.x php scripts to use current naming convention of $camelCase
+// for properties / class member variables. To use, change into the directory
+// containing php files that you wish to update and run this script. Example:
+// $ cd /path/to/project
+// $ php ../php-curl-class/scripts/v4_migration.php
+
+$cwd = getcwd();
+echo 'Checking current directory "' . $cwd . '" for possible changes.' . "\n";
+
+$results = array(
+    'errors' => array(),
+    'files_found' => array(),
+    'files_to_change' => array(),
+);
+
+$migrations = array(
+    'error_code' => 'errorCode',
+    'error_message' => 'errorMessage',
+    'curl_error' => 'curlError',
+    'curl_error_code' => 'curlErrorCode',
+    'curl_error_message' => 'curlErrorMessage',
+    'http_error' => 'httpError',
+    'http_status_code' => 'httpStatusCode',
+    'http_error_message' => 'httpErrorMessage',
+    'base_url' => 'baseUrl',
+    'request_headers' => 'requestHeaders',
+    'response_headers' => 'responseHeaders',
+    'raw_response_headers' => 'rawResponseHeaders',
+    'raw_response' => 'rawResponse',
+    'before_send_function' => 'beforeSendFunction',
+    'download_complete_function' => 'downloadCompleteFunction',
+);
+
+$directory = new RecursiveDirectoryIterator($cwd);
+$iterator = new RecursiveIteratorIterator($directory);
+$regex = new RegexIterator($iterator, '/^.+\.php$/i', RecursiveRegexIterator::GET_MATCH);
+foreach ($regex as $file) {
+    $filepath = $file['0'];
+    $results['files_found'][] = $filepath;
+    if ($filepath === __FILE__) {
+        continue;
+    }
+    $data = file_get_contents($filepath);
+    $short_path = str_replace($cwd, '', $filepath);
+    if ($data === false) {
+        $results['errors'][] = $filepath;
+        echo $short_path . ' [ERROR]' . "\n";
+    } else {
+        foreach ($migrations as $old => $new) {
+            if (!(strpos($data, '->' . $old) === false)) {
+                $results['files_to_change'][] = $filepath;
+                echo $short_path . "\n";
+                break;
+            }
+        }
+    }
+}
+
+foreach ($results as $name => $files) {
+    $results[$name . '_count'] = count($files);
+}
+$results['errors_count'] = count($results['errors']);
+$results['files_found_count'] = count($results['files_found']);
+$results['files_to_change_count'] = count($results['files_to_change']);
+
+if ($results['errors_count'] > 0) {
+    echo 'ERROR: Unable to read files.' . "\n";
+    exit(1);
+} else if ($results['files_found_count'] === 0) {
+    echo 'Current directory "' . $cwd . '"' . "\n";
+    echo 'ERROR: No read files found in current directory.' . "\n";
+    exit(1);
+} else if ($results['files_to_change_count'] === 0) {
+    echo 'OK: No files to change.' . "\n";
+    exit(0);
+} else if ($results['files_to_change_count'] > 0) {
+    echo $results['files_to_change_count'] . ' of ' . $results['files_found_count'] . ' files to change found.' . "\n";
+    echo 'Continue? [y/n] ';
+    if (!in_array(trim(fgets(STDIN)), array('y', 'Y'))) {
+        die();
+    }
+    foreach ($results['files_to_change'] as $filepath) {
+        $data = file_get_contents($filepath);
+        foreach ($migrations as $old => $new) {
+            $data = str_replace('->' . $old, '->' . $new, $data);
+        }
+        file_put_contents($filepath, $data);
+    }
+    echo 'Done' . "\n";
+    exit(0);
+}