PHP constant in static variable

Question

I need to use PHP constant in a static variable but I discover today that it's not possible : Is a global PHP CONSTANT available inside of a Class file?

define("TABLE_PREFIX", "TEST_");

class Test {

    private static $sql_query = "select * from ".TABLE_PREFIX."USER";

    public static function show_query1() {
        echo "My first test";
        echo self::$sql_query;
    }

    public static function show_query2() {
        echo "My second test";
        echo self::$sql_query;
    }

}


Test::show_query1();
Test::show_query2();

I don't want to pass the constant as an argument to the static function and I don't want to declare $sql_query in each static function.

What is the best way to to it ?

EDIT : add demo = http://codepad.org/aqzj2TJh

You can use the constant just fine. What you cannot do is use an expression like "concatenated"."strings". — Jon
– Jon, Commented Jun 25, 2013 at 10:22
You found the right answer already, you just misunderstood it. — deceze
– deceze ♦, Commented Jun 25, 2013 at 11:17
@YogeshSuthar : classic getter and setter only works in object context. I don't want to define a static setter and to call it each time... (if there is another solution) — Matth
– Matth, Commented Jun 25, 2013 at 11:21
@Jon : You can use the constant just fine => so why do I get this error : "Parse error: syntax error, unexpected '.', expecting ',' or ';' on line 7" (see the demo link I've added) — Matth
– Matth, Commented Jun 25, 2013 at 11:25

Amit Kumar Sharma · Accepted Answer · 2013-06-25 11:25:18Z

1

You can do the same with other way.

define("TABLE_PREFIX", "TEST_");
define("TEST_TABLE_QUERY", "select * from ".TABLE_PREFIX."USER");
class Test {

    private static $sql_query = TEST_TABLE_QUERY;

    public static function show_query1() {
        echo "My first test";
        echo self::$sql_query;
   }

    public static function show_query2() {
        echo "My second test";
        echo self::$sql_query;
   }

}

Hope this can help you.

answered Jun 25, 2013 at 11:25

Amit Kumar Sharma

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2 Comments

Matth Over a year ago

Thank you Amit Kumar Sharma, it works but my sql queries are very big and I get word wrap inside them...

Amit Kumar Sharma Over a year ago

In this case you may use %s in the define("TEST_TABLE_QUERY", "select %s TABLE WHERE %s "); And than can use sprinf() in your class

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