Fix snake_case variable names

Author: alcaeus

source/includes/read/cursor.php

@@ -26,7 +26,7 @@
 // Converts the documents stored in a cursor to an array
 // start-cursor-array
 $cursor = $collection->find(['name' => 'Dunkin\' Donuts']);
-$array_results = $cursor->toArray();
+$resultArray = $cursor->toArray();
 // end-cursor-array
 
 // Creates a collection with a maximum size and inserts documents representing vegetables
@@ -52,12 +52,12 @@
 $cursor = $collection->find([], ['cursorType' => MongoDB\Operation\Find::TAILABLE]);
 $cursor->rewind();
 
-$docs_found = 0;
-while ($docs_found < 3) {
+$docsFound = 0;
+while ($docsFound < 3) {
     if ($cursor->valid()) {
         $doc = $cursor->current();
         echo json_encode($doc), PHP_EOL;
-        $docs_found++;
+        $docsFound++;
     }
     $cursor->next();
 }

source/includes/write/gridfs.php

@@ -21,7 +21,7 @@ function toJSON(object $document): string
 
 // Creates or references a GridFS bucket with a custom name
 // start-create-custom-bucket
-$custom_bucket = $client->db->selectGridFSBucket(
+$customBucket = $client->db->selectGridFSBucket(
     ['bucketName' => 'myCustomBucket'],
 );
 // end-create-custom-bucket
@@ -44,8 +44,8 @@ function toJSON(object $document): string
 // Prints information about each file in the bucket
 // start-retrieve-file-info
 $files = $bucket->find();
-foreach ($files as $file_doc) {
-    echo toJSON($file_doc), PHP_EOL;
+foreach ($files as $fileDocument) {
+    echo toJSON($fileDocument), PHP_EOL;
 }
 // end-retrieve-file-info
 

source/includes/write/replace.php

@@ -9,7 +9,7 @@
 // end-db-coll
 
 // start-replace-one
-$replace_document = [
+$replaceDocument = [
     'name' => 'Mongo\'s Pizza',
     'cuisine' => 'Pizza',
     'address' => [
@@ -19,12 +19,12 @@
     'borough' => 'Manhattan',
 ];
 
-$result = $collection->replaceOne(['name' => 'Pizza Town'], $replace_document);
+$result = $collection->replaceOne(['name' => 'Pizza Town'], $replaceDocument);
 echo 'Modified documents: ', $result->getModifiedCount();
 // end-replace-one
 
 // start-replace-options
-$replace_document = [
+$replaceDocument = [
     'name' => 'Food World',
     'cuisine' => 'Mixed',
     'address' => [
@@ -36,7 +36,7 @@
 
 $result = $collection->replaceOne(
     ['name' => 'Food Town'],
-    $replace_document,
+    $replaceDocument,
     ['upsert' => true],
 );
 // end-replace-options