Null variable value

Question

I'm still new with php.

This is my code:

<!DOCTYPE html>
<html>
<head>
    <title>
    Data buku alamat dengan class
    </title>
</head>
<?php
    class orang
    {
        public $nama="";
        public $jk="";
        public $tptLahir="";
        public $tglLahir="";
        function umur()
        {
            list($tgl,$bln,$thn) = explode('-',$tglLahir); 
            $lahir = mktime(0, 0, 0, (int)$bln, (int)$tgl, $thn);
            $t = time();
            $umur = ($lahir < 0) ? ( $t - $lahir ) : $t - $lahir; 
            $tahun = 60 * 60 * 24 * 365; 
            $tahunlahir = $umur / $tahun; 
            $umursekarang=floor($tahunlahir); 
            return $umursekarang;
        }
        function tampilkan()
        {
            echo "<hr>Nama : ".$this->nama;
            echo "<hr>Jenis Kelamin : ".$this->jk;
            echo "<hr>Tempat Lahir : ".$this->tptLahir;
            echo "<hr>Tanggal Lahir : ".$this->tglLahir;
            echo "<hr>Umur : ".$this->umur();
        }
    }
?>
<body>
    <h1>
        Script : Data buku alamat dengan class
    </h1>
    <?php

        $orang1= new orang();
        $orang1->nama="Jack";
        $orang1->jk="laki-laki";
        $orang1->tptLahir="Jakarta";
        $orang1->tglLahir="12-09-1988";
        $orang1->tampilkan();

    ?>
</body>
</html>

There's no error. The problem is that, the result of $this->umur() was 15, not 26.

It seem the value in public $tglLahir variable not processed by function umur().

Can anyone tell me where did i did wrong and help how to solve it?

"The answer? The answer to what?" - The Hitchhikers guide to the Galaxy. — willeM_ Van Onsem
– willeM_ Van Onsem, Commented Dec 30, 2014 at 22:52

chiliNUT · Accepted Answer · 2014-12-30 22:54:00Z

3

$tglLahir is a property of the class orang, so in umur(), instead of:

list($tgl,$bln,$thn) = explode('-',$tglLahir);

you need to reference it as a property ($this->tglLahir instead of $tglLahir), so:

list($tgl,$bln,$thn) = explode('-',$this->tglLahir);

answered Dec 30, 2014 at 22:54

chiliNUT

19.4k14 gold badges72 silver badges116 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user2977799 Over a year ago

Wow, thnx XD ow, god, how can i forgot about that XD thnx alot :)

Rizier123 · Accepted Answer · 2014-12-30 22:54:07Z

2

You don't call the variable from your class $tglLahir, see:

list($tgl,$bln,$thn) = explode('-',$tglLahir);

So just change this line to this:

list($tgl,$bln,$thn) = explode('-',$this->tglLahir);

You almost spotted the error yourself (It seem the value in public $tglLahir variable not processed by function umur())! I would recommend you to add error reporting while you are in testing environment, so you may can spot the next error yourself.

<?php
    ini_set("display_errors", 1);
    error_reporting(E_ALL);
?>

answered Dec 30, 2014 at 22:54

Rizier123

59.8k17 gold badges106 silver badges167 bronze badges

1 Comment

user2977799 Over a year ago

Wow, thnx XD ow, god, how can i forgot about that XD thnx alot :) i wish i can checklist both of you :)

Collectives™ on Stack Overflow

Null variable value

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related