OO PHP类变量空数组意外t_variable [重复]

Question

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• PHP parse/syntax errors; and how to solve them? 17 answers

I wanted to initialize a class array as empty. For some reason, it's giving me the error "unexpected T_VARIABLE." Does anyone have an idea what's wrong with this class variable/array? This is what the class looks like:

class SentenceContentContainer {
    var $strSentence; //theSentence entered
    $arrayOfWords = []; //running the code has issue with this line

    function SentenceContentContainer($strSentence)
    {
        $this->strSentence = $strSentence;
    }

    function addWordToContainer(&$wordToAdd)
    {
        ...
    }
} //SentenceContentContainer

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Answer 1

The code you're using is old PHP 4 syntax for objects, so stop using whatever resource you're learning from and start looking for something recent.

The var keyword and old-style constructors (function with same name as class) are both relics of a bygone age. You should be using the public keyword — assuming you need to access these variables publicly — and __construct() as a constructor function.

class SentenceContentContainer {
    public $strSentence; //theSentence entered
    public $arrayOfWords = []; //running the code has issue with this line

    function __construct($strSentence)
    {
        $this->strSentence = $strSentence;
    }

    function addWordToContainer(&$wordToAdd)
    {
        ...
    }
} //SentenceContentContainer

Note that unless you need to do something like this:

$sent = new SentenceContentContainer("Test sentence");
echo $sent->strSentence;

You should probably declare the variables as private instead of public.