Similar looking variables

This is the list of similar looking variables, found across the application. They might be confused one with the other.

One _ : the difference in the name is only _ (underscore); Case : the difference in the name is only the case; One letter : the difference in the name is only one letter;One digit : the difference in the name is only one digit;Partial inversion : the variable name may be broken in two pieces, which were inverted;

Variable	Variables	Reason
$_data	$data	One _
$_fields	$fields	One _
$_level	$level	One _
$_recursion	$recursion	One _
$depth_limit	$depthlimit	One _
$plain_text	$plaintext	One _
$filepath	$filePath	Case
$fileinfo	$fileInfo	Case
$subnode	$subNode	Case
$dbgroup	$dbGroup $DBGroup	Case
$filename	$fileName	Case
$filename	$filenames	One letter
$doctypes	$docTypes	Case
$userdata	$userData	Case
$classname	$className	Case
$dbprefix	$dbPrefix $DBPrefix	Case
$retval	$retVal	Case
$subquery	$subQuery	Case
$qbkey	$qbKey	Case
$valstr	$valStr	Case
$newname	$newName	Case
$datetime	$dateTime	Case
$samesite	$sameSite	Case
$username	$userName	Case
$httponly	$httpOnly	Case
$newfile	$newFile	Case
$plaintext	$plainText	Case
$plaintext	$plain_text	One letter
$concat1	$concat2	One digit
$concat2	$concat1	One digit
$possibleView1	$possibleView2	One digit
$possibleView2	$possibleView1	One digit
$handler1	$handler $handler2	One digit
$handler2	$handler $handler1	One digit
$file1	$file $file2	One digit
$file2	$file $file1	One digit
$query2	$query	One digit
$db1	$db2	One digit
$db2	$db1	One digit
$param1	$param $param2	One digit
$param2	$param $param1	One digit
$template1	$template $template2	One digit
$data1	$data	One digit
$template2	$template $template1	One digit
$message2	$message	One digit
$time2	$time $time1	One digit
$time1	$time $time2	One digit
$options1	$options $options2	One digit
$client1	$client $client2	One digit
$options2	$options $options1	One digit
$client2	$client $client1	One digit
$seg1	$seg2 $seg3	One digit
$seg2	$seg1 $seg3	One digit
$seg3	$seg1 $seg2	One digit
$key	$keys $fkey	One letter
$ext	$exit $text $next	One letter
$row	$rows	One letter
$var	$vars	One letter
$uri	$uris	One letter
$val	$vals	One letter
$sql	$sqls	One letter
$set	$sets	One letter
$arg	$args	One letter
$res	$rest $reps $resp	One letter
$tab	$tabs	One letter
$new	$news	One letter
$pos	$post	One letter
$all	$call	One letter
$tmp	$temp	One letter
$age	$page	One letter
$tag	$tags	One letter
$red	$read	One letter
$col	$cols	One letter
$opt	$opts	One letter
$day	$days	One letter
$att	$atts $attr	One letter
$chr	$char	One letter
$ord	$word	One letter
$ret	$rest	One letter
$rep	$reps $resp	One letter
$ref	$href	One letter
$sec	$usec	One letter
$add	$addy	One letter
$bar	$bare	One letter
$file	$files $file1 $file2	One letter
$path	$paths $xpath	One letter
$type	$types	One letter
$line	$lines	One letter
$name	$cname $names	One letter
$time	$timer $mtime $time2 $time1	One letter
$data	$_data $data1	One letter
$item	$items	One letter
$atts	$attrs	One letter
$page	$pager	One letter
$prop	$props $rprop	One letter
$body	$tbody	One letter
$mode	$model	One letter
$bind	$binds	One letter
$info	$finfo	One letter
$attr	$attrs	One letter
$seed	$seeds	One letter
$mime	$mtime	One letter
$base	$bases	One letter
$pair	$pairs	One letter
$user	$users	One letter
$html	$xhtml	One letter
$part	$parts	One letter
$rest	$reset	One letter
$year	$years	One letter
$hour	$hours	One letter
$word	$words	One letter
$rule	$rules	One letter
$call	$calls	One letter
$hook	$hooks	One letter
$case	$cases	One letter
$char	$chars	One letter
$link	$links	One letter
$post	$posts	One letter
$verb	$verbs	One letter
$task	$tasks	One letter
$title	$titles	One letter
$index	$indexs	One letter
$value	$values	One letter
$error	$errors	One letter
$param	$params $param1 $param2	One letter
$array	$arrayp	One letter
$table	$tables	One letter
$query	$query2	One letter
$cache	$cached $caches	One letter
$level	$_level	One letter
$route	$routes $router	One letter
$timer	$timers	One letter
$trait	$traits	One letter
$group	$groups	One letter
$field	$fields	One letter
$event	$events	One letter
$extra	$extras	One letter
$input	$inputs	One letter
$owner	$cowner	One letter
$stats	$status	One letter
$token	$tokens	One letter
$after	$afters	One letter
$style	$styles	One letter
$chunk	$chunks	One letter
$depth	$pdepth $cdepth	One letter
$store	$stored	One letter
$regex	$regexp	One letter
$frame	$frames	One letter
$month	$months	One letter
$local	$locale	One letter
$track	$tracks	One letter
$slice	$slicep	One letter
$header	$headers	One letter
$length	$lengths	One letter
$object	$objects	One letter
$result	$results	One letter
$escape	$escaper $escaped	One letter
$method	$methods	One letter
$locale	$locales	One letter
$source	$sourced $sources	One letter
$filter	$filters	One letter
$fields	$_fields	One letter
$column	$columns	One letter
$delete	$deleted	One letter
$indexs	$indexes	One letter
$handle	$handler	One letter
$string	$strings	One letter
$cookie	$cookies	One letter
$option	$options	One letter
$expire	$expires	One letter
$plugin	$plugins	One letter
$minute	$minutes	One letter
$second	$seconds	One letter
$client	$client1 $client2	One letter
$message	$messages $message2	One letter
$pattern	$patterns	One letter
$replace	$replaces	One letter
$command	$commands	One letter
$options	$options1 $options2	One letter
$default	$defaults	One letter
$service	$services	One letter
$segment	$segments	One letter
$handler	$handlers $handler1 $handler2	One letter
$element	$elements	One letter
$content	$contents	One letter
$setting	$settings	One letter
$proxyIP	$proxyIPs	One letter
$package	$packages	One letter
$trigger	$triggers	One letter
$include	$includes	One letter
$attempt	$attempts	One letter
$function	$functions	One letter
$override	$overrides	One letter
$argument	$arguments	One letter
$resource	$resources	One letter
$bindType	$bindTypes	One letter
$dataType	$dataTypes	One letter
$template	$template1 $template2	One letter
$replaces	$replacers	One letter
$protocol	$protocols	One letter
$listener	$listeners	One letter
$timezone	$timezones	One letter
$errorName	$errorNames	One letter
$fieldName	$fieldNames	One letter
$migration	$migrations	One letter
$namespace	$namespaces	One letter
$fieldData	$fieldDatas	One letter
$condition	$conditions	One letter
$parameter	$parameters	One letter
$formatter	$formatters	One letter
$attribute	$attributes	One letter
$decorator	$decorators	One letter
$backtrace	$backtraces	One letter
$phraseKey	$phraseKeys	One letter
$publisher	$publishers	One letter
$classPath	$classPaths	One letter
$afterWord	$afterWords	One letter
$recursion	$_recursion	One letter
$collector	$collectors	One letter
$keyToMask	$keysToMask	One letter
$excludeDir	$excludeDirs	One letter
$columnName	$columnNames	One letter
$controller	$controllers	One letter
$constraint	$constraints	One letter
$foreignKey	$foreignKeys	One letter
$beforeWord	$beforeWords	One letter
$includeDir	$includeDirs	One letter
$depthlimit	$depth_limit	One letter
$otherField	$otherFields	One letter
$matchedKey	$matchedKeys	One letter
$placeholder	$placeholders	One letter
$sqlsrvError	$sqlsrvErrors	One letter
$description	$descriptions	One letter
$htmlComment	$htmlComments	One letter
$installPath	$installPaths	One letter
$methodParam	$methodParams	One letter
$namespacePath	$namespacedPath $namespacePaths	One letter
$processedField	$processedFields	One letter
$fallbackLocale	$fallbackLocales	One letter
$validationRule	$validationRules	One letter
$reflectionParam	$reflectionParams	One letter
$placeholderRule	$placeholderRules	One letter
$paramTagValueNode	$paramTagValueNodes	One letter