Syntax error in PHP 5.2

Question

In the php 5.3 I can use class name as variable and I can call static variable.

$class_name = 'Test';
$class_name::$static_var;

How to call it in the php 5.2 version?

Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in ...

you can refer these below links for your task. http://stackoverflow.com/questions/4995540/unexpected-t-paamayim-nekudotayim-in-php-5-2-x OR http://stackoverflow.com/questions/3679717/unexpected-t-paamayim-nekudotayim-on-one-computer-but-not-another-with-php-5 This will helpful to you.. Thanks. — Chandresh M
– Chandresh M, Commented Oct 14, 2011 at 7:11

user769394 · Accepted Answer · 2011-10-14 07:11:08Z

1

T_PAAMAYIM_NEKUDOTAYIM is the double colon scope resolution thingy PHP uses - :: You can try this $class_name = 'Test'; $class_name->$static_var;

answered Oct 14, 2011 at 7:11

user769394

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Rajan Rawal · Accepted Answer · 2011-10-14 09:13:17Z

1

@user762799 here is the solution for what you want to do it in php 5.2

class Sample{
    public static $name;

    public function __construct(){
        self::$name = "User 1";
    }
}

$sample = new Sample();
$class = 'Sample';
$name = 'name';
$val_name = "";
$str = '$class::$$name';
eval("\$val_name = \"$str\";");
//echo $val_name."<br>";
eval("\$name = $val_name;");
echo $name;

PAAMAYIM_NEKUDOTAYIM means scope resolution operator(::) actually in your code PHP is unable to identify $static_var in the scope of $class_name that is why the error occured.

If you still not clear, let me know. Thank you :)

answered Oct 14, 2011 at 9:13

Rajan Rawal

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Comments

NikiC · Accepted Answer · 2011-10-14 09:35:03Z

1

You really should update your PHP version, 5.2 isn't supported anymore, but ...

... in PHP 5.2 the only way to hack around this is to use eval:

$return = eval($class_name . '::\\$static_var;');

But be sure to validate $class_name before you use this, otherwise arbitrary code could be injected (e.g. $class_name = 'do_bad_things(); Class_Name).

answered Oct 14, 2011 at 9:35

NikiC

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