CODEWITHSUNDEEP
php
codepuppy
codepuppy

Reputation: 1140

mktime creates a syntax error when used inside a class?

Please could someone tell me why mktime is giving an error inside a class??

<?php

$time_Stamp = mktime(6,30,0);

echo strftime("%H:%M",$time_Stamp);

?>

reports 6:30

<?php

    class Test_Time{

        private $time_Stamp = mktime(6,30,0);

    }

    ?>

reports Parse error: syntax error, unexpected '(', expecting ',' or ';' in C:\Program Files (x86)\Ampps\www\sandbox\general\mktime.php on line 5

Upvotes: 0

Views: 215

Answers (5)

Tarun
Tarun

Reputation: 3165

According to the PHP docs, one can initialize properties in classes with the following restriction:

"This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated."

Try this

<?php

class Test_Time{

    private $time_Stamp; 
   function __construct()
   {
        $this->time_Stamp = mktime(6,30,0);

         echo strftime("%H:%M",$this->time_Stamp);
   }
}
?>

Upvotes: 3

user399666
user399666

Reputation: 19879

<?php
class Test_Time{

    private $time_Stamp;

    function __construct(){
        $this->time_Stamp = mktime(6, 30, 0);
    }

    function printTime(){
        echo strftime("%H:%M", $this->time_Stamp);
    }
}

//example usage
$test = new Test_Time();
$test->printTime();
?>

Upvotes: 1

Fluffeh
Fluffeh

Reputation: 33512

You can't execute code directly inside a class. It has to be inside a function which is called:

<?php
    class Test_Time
    {
        private $time_Stamp;
        function showTime()
        {
            $this->time_stamp=mktime(6,30,0);
            echo strftime("%H:%M",$this->time_Stamp);
        }
    }

    $var=new Test_Time();
    $var->showTime();

?>

This could be a __construct() function, but at some point the class must be instanciated.

The reason for this is that a class isn't actually anything unless a variable is defined as an object of that class. Until then, it is just a framework waiting be be used.

Upvotes: 1

WatsMyName
WatsMyName

Reputation: 4478

You are directly echoing in a class, do it in method or a constructer instead

<?php

class Test_Time{

   function __construct(){

    $time_Stamp = mktime(6,30,0);

    echo strftime("%H:%M",$time_Stamp);
    }

}

?>

Upvotes: 0

Waleed Khan
Waleed Khan

Reputation: 11467

You cannot evaluate expressions to determine the default values of class members. Put mktime in the constructor instead:

class Foo {
    private $bar;
    public function __construct() {
        $this->bar = mktime(6, 30, 0);
    }
}

Upvotes: 1

Related Questions