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    };
  }
  function stringWithEscapes(stream, state) {
    var escaped = false, next, end = false;

    if (stream.current() == '"') return "string";

    // "Complex" syntax
    if (stream.match("${", false) || stream.match("{$", false)) {
      state.tokenize = null;
      return "string";
    }

    // Simple syntax
    if (stream.match(/\$[a-zA-Z_][a-zA-Z0-9_]*/)) {
      // After the variable name there may appear array or object operator.
      if (stream.match("[", false)) {
        // Match array operator
        state.tokenize = matchSequence([
          [["[", null]],
          [[/\d[\w\.]*/, "number"],
           [/\$[a-zA-Z_][a-zA-Z0-9_]*/, "variable-2"],
           [/[\w\$]+/, "variable"]],
          [["]", null]]
        ]);
      }
      if (stream.match(/\-\>\w/, false)) {
        // Match object operator
        state.tokenize = matchSequence([
          [["->", null]],
          [[/[\w]+/, "variable"]]
        ]);
      }
      return "variable-2";
    }

    // Normal string
    while (
      !stream.eol() &&
      (!stream.match("{$", false)) &&
      (!stream.match(/(\$[a-zA-Z_][a-zA-Z0-9_]*|\$\{)/, false) || escaped)
    ) {
      next = stream.next();
      if (!escaped && next == '"') { end = true; break; }
      escaped = !escaped && next == "\\";
    }
    if (end) {
      state.tokenize = null;
      state.phpEncapsStack.pop();
    }
    return "string";
  }

  var phpKeywords = "abstract and array as break case catch class clone const continue declare default " +
    "do else elseif enddeclare endfor endforeach endif endswitch endwhile extends final " +
    "for foreach function global goto if implements interface instanceof namespace " +
    "new or private protected public static switch throw trait try use var while xor " +
    "die echo empty exit eval include include_once isset list require require_once return " +
    "print unset __halt_compiler self static parent yield insteadof finally";
  var phpAtoms = "true false null TRUE FALSE NULL __CLASS__ __DIR__ __FILE__ __LINE__ __METHOD__ __FUNCTION__ __NAMESPACE__ __TRAIT__";
  var phpBuiltin = "func_num_args func_get_arg func_get_args strlen strcmp strncmp strcasecmp strncasecmp each error_reporting define defined trigger_error user_error set_error_handler restore_error_handler get_declared_classes get_loaded_extensions ...
  CodeMirror.registerHelper("hintWords", "php", [phpKeywords, phpAtoms, phpBuiltin].join(" ").split(" "));
  CodeMirror.registerHelper("wordChars", "php", /[\\w$]/);

  var phpConfig = {
    name: "clike",
    helperType: "php",
    keywords: keywords(phpKeywords),
    blockKeywords: keywords("catch do else elseif for foreach if switch try while finally"),
    atoms: keywords(phpAtoms),
    builtin: keywords(phpBuiltin),
    multiLineStrings: true,
    hooks: {
      "$": function(stream) {
        stream.eatWhile(/[\w\$_]/);
        return "variable-2";
      },
      "<": function(stream, state) {
        if (stream.match(/<</)) {
          stream.eatWhile(/[\w\.]/);
          state.tokenize = heredoc(stream.current().slice(3));
          return state.tokenize(stream, state);
        }
        return false;
      },
      "#": function(stream) {
        while (!stream.eol() && !stream.match("?>", false)) stream.next();
        return "comment";
      },
      "/": function(stream) {
        if (stream.eat("/")) {
          while (!stream.eol() && !stream.match("?>", false)) stream.next();
          return "comment";
        }
        return false;
      },
      '"': function(stream, state) {
        if (!state.phpEncapsStack)
          state.phpEncapsStack = [];
        state.phpEncapsStack.push(0);
        state.tokenize = stringWithEscapes;
        return state.tokenize(stream, state);
      },
      "{": function(_stream, state) {
        if (state.phpEncapsStack && state.phpEncapsStack.length > 0)
          state.phpEncapsStack[state.phpEncapsStack.length - 1]++;
        return false;
      },
      "}": function(_stream, state) {
        if (state.phpEncapsStack && state.phpEncapsStack.length > 0)
          if (--state.phpEncapsStack[state.phpEncapsStack.length - 1] == 0)
            state.tokenize = stringWithEscapes;
        return false;
      }
    }
  };

  CodeMirror.defineMode("php", function(config, parserConfig) {
    var htmlMode = CodeMirror.getMode(config, "text/html");
    var phpMode = CodeMirror.getMode(config, phpConfig);