'display a particular string if a string variable is empty in php

I have a php class as shown below:

<?php

class helloWorld
{
    public $ab;
    public $cd;
    public $ef;
    public $gh;
    public $ij;
    public $kl;

    public function __construct($ab = 0,
                                    $cd = 0,
                                    $ef = 0,
                                    $gh = 0,
                                    $ij = '',
                                    $kl = '')
    {
        $this->ab = $ab;
        $this->cd = $cd;
        $this->ef = $ef;
        $this->gh = $gh;
        $this->ij = $ij;
        $this->kl = $kl;
    }
}

Problem Statement: What I want to achieve is if $kl is empty then assign ZZ to $kl.

This is what I have tried. Let me know if it looks good or if there are any changes I need to make.

<?php

class helloWorld
{
    public $ab;
    public $cd;
    public $ef;
    public $gh;
    public $ij;
    public $kl;

    public function __construct($ab = 0,
                                    $cd = 0,
                                    $ef = 0,
                                    $gh = 0,
                                    $ij = '',
                                    $kl = '')
    {
        $this->ab = $ab;
        $this->cd = $cd;
        $this->ef = $ef;
        $this->gh = $gh;
        $this->ij = $ij;
        if ('' == $kl || is_null($kl)) {    
            $kl = 'ZZ';
        }
        $this->kl = $kl;
    }
}
?>
php


Solution 1:[1]

your code is correct but it shout be short

 <?php

class helloWorld
{
    public $ab;
    public $cd;
    public $ef;
    public $gh;
    public $ij;
    public $kl;

    public function __construct($ab = 0,
                                    $cd = 0,
                                    $ef = 0,
                                    $gh = 0,
                                    $ij = '',
                                    $kl = '')
    {
        $this->ab = $ab;
        $this->cd = $cd;
        $this->ef = $ef;
        $this->gh = $gh;
        $this->ij = $ij;
        $this->kl = empty($kl) ? 'ZZ' : $kl;
    }
}
?>

Sources

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Source: Stack Overflow

Solution Source
Solution 1

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