static void Main()
{
//string line1 = "<?php";
//string line2 = "$browser = $_SERVER['HTTP_USER_AGENT'] ;";
//string line3 = "$arr = array();";
//string line4 = "$arr[$zero] = $browser;";
//string line5 = " var_dump($arr);";
//string line6 = "?>";
//string[] arr = new string[] { line1, line2, line3, line4, line5, line6 };
string input = Console.ReadLine();
List<string> lines = new List<string>();
while (input != "?>")
{
lines.Add(input);
input = Console.ReadLine();
}
lines.Add(input);
string[] arr = lines.ToArray();
List<string> listNames = new List<string>();
for (int i = 0; i < arr.Length; i++)
{
if (arr[i].Length != 0)
{
if (arr[i].Substring(0, 1) != "#" && arr[i].Substring(0, 1) != "//" && arr[i].Substring(0, 1) != "/*")
{
int index = arr[i].IndexOf("$");
int temp = index;
while (index != -1)
{
index++;
string currChar = arr[i].Substring(index, 1);
string name = string.Empty;
while (currChar != " " && currChar != "[" && currChar != "]" && currChar != ";" && currChar != ")" && currChar != "=" && currChar != "'" && currChar != "\"")
{
name += currChar;
index++;
currChar = arr[i].Substring(index, 1);
}
bool addState = true;
foreach (string ele in listNames)
{
if (name == ele)
{
addState = false;
}
}
if (addState)
{
listNames.Add(name);
}
index = arr[i].IndexOf("$");
arr[i] = arr[i].Remove(index, 1);
index = arr[i].IndexOf("$");
}
}
}
}
listNames.Sort();
Console.WriteLine("{0}", listNames.Count);
foreach (string name in listNames)
{
Console.WriteLine(name);
}
}
static void Main()
{
StringBuilder input = new StringBuilder();
string inputLine = Console.ReadLine();
while (inputLine != "?>")
{
input.Append("\n");
input.Append(inputLine);
inputLine = Console.ReadLine();
}
//string thePHPCode = "<?php $browser = $_SERVER['HTTP_USER_AGENT'] ; $arr = array(); $arr[$zero] = $browser; var_dump($arr); ?>";
//string thePHPCode = "<?php /* This is $var1 in comments */ \n $var3 = \"Some string \\$var4 with var escaped. \"; \n echo $var5; echo(\"$foo,$bar\"); \n // Another comment with variable $var2";
//string thePHPCode = "<?php \n # this is $comment \n $valid_var='\"text\"'...{$valid_var}'; \n $just=\"Just another var $Just...\";$just=$code;\n?>";
string thePHPCode = input.ToString();
bool isVar = false;
bool inComment = false;
bool escaped = false;
bool inString1 = false;
bool inString2 = false;
StringBuilder varPHP = new StringBuilder();
List<string> allVars = new List<string>();
foreach (char symbol in thePHPCode)
{
//comments
if (symbol == '#' || symbol == '/')
{
inComment = true;
continue;
}
if (inComment == true)
{
if (symbol == '\n' || symbol == '/')
{
inComment = false;
continue;
}
}
//strings
if (symbol == '"' && inString1 != true)
{
inString1 = true;
continue;
}
if (inString1 == true)
{
if (symbol == '\\')
{
escaped = true;
}
if (escaped == true && symbol == ' ')
{
escaped = false;
//what if we have an escaped var, and after that a non-escaped var?
}
if (symbol == '"')
{
inString1 = false;
escaped = false;
continue;
}
}
//other strings
if (symbol == '\'' && inString2 != true)
{
inString2 = true;
continue;
}
if (inString2 == true)
{
if (symbol == '\\')
{
escaped = true;
}
if (escaped == true && symbol == ' ')
{
escaped = false;
//what if we have an escaped var, and after that a non-escaped var?
}
if (symbol == '\'')
{
inString2 = false;
escaped = false;
continue;
}
}
//vars
if (symbol == '$' && inComment != true && escaped != true)
{
isVar = true;
continue;
}
if (isVar == true)
{
if (symbol != ' ' && symbol != '=' && symbol != '[' && symbol != ']' && symbol != '(' && symbol != ')' && symbol != '{' && symbol != '}' && symbol != ';' && symbol != ',' && symbol != '"' && symbol != '\'' && symbol != '\'' && symbol != '.')
{
varPHP.Append(symbol);
}
else
{
bool contains = allVars.Contains(varPHP.ToString());
if (contains == false)
{
allVars.Add(varPHP.ToString());
}
varPHP.Clear();
isVar = false;
}
}
}
Console.WriteLine(allVars.Count);
allVars.Sort();
for (int i = 0; i < allVars.Count; i++)
{
Console.WriteLine(allVars[i]);
}
}