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php call constant in class

Ren answered on February 25, 2022 Popularity 9/10 Helpfulness 3/10

answer php call constant in class

related class constants in php

php call constant in class

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//it's possible to declare constant in base class, and override it in child, and access to correct value of the const from the static method is possible by 'get_called_class' method:
<?php
abstract class dbObject
{   
    const TABLE_NAME='undefined';
   
    public static function GetAll()
    {
        $c = get_called_class();
        return "SELECT * FROM `".$c::TABLE_NAME."`";
    }   
}

class dbPerson extends dbObject
{
    const TABLE_NAME='persons';
}

class dbAdmin extends dbPerson
{
    const TABLE_NAME='admins';
}

echo dbPerson::GetAll()."<br>";//output: "SELECT * FROM `persons`"
echo dbAdmin::GetAll()."<br>";//output: "SELECT * FROM `admins`"

?>

Popularity 9/10 Helpfulness 3/10 Language php

Source: www.php.net

Tags: call class php

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Contributed on Feb 25 2022

Ren

0 Answers Avg Quality 2/10

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class constants in php

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<?php
class MyClass
{
    const CONSTANT = 'constant value';

    function showConstant() {
        echo  self::CONSTANT . "\n";
    }
}

echo MyClass::CONSTANT . "\n";

$classname = "MyClass";
echo $classname::CONSTANT . "\n";

$class = new MyClass();
$class->showConstant();

echo $class::CONSTANT."\n";
?>

Popularity 9/10 Helpfulness 4/10 Language php

Source: www.php.net

Tags: class-constants

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Contributed on Aug 09 2022

Prickly Piranha

0 Answers Avg Quality 2/10

php call constant in class

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class constants in php

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