PHP - Generate Functions from array of string

Question

In my application i need many getter and setter and my idea was to generate them from an array, for example:

protected $methods = ['name', 'city'];

With this two parameters, i will need to generate the following methods:

public function getNameAttribute() {
  return $this->getName();
}

public function getName($lang = null) {
  return $this->getEntityValue('name', $lang);
}

And for city, the method will be:

public function getCityAttribute() {
  return $this->getCity();
}

public function getCity($lang = null) {
  return $this->getEntityValue('city', $lang);
}

Sure, i should need to generate the setter too (with the same logic).

As you can see, i will need a method with get<variable_name>Attribute and inside this call get<variable_name> and the other (getName) return even the same method (for each getter) and just change the 'name' parameter.

Every method have the same logic and i would like to generate them "dynamically". I don't know if this is possible..

Give us an example on what you would expect to see when you run the functions — user6360214
– user6360214, Commented Sep 22, 2016 at 7:32
The two "getter" method you see is what i should need to generate. For the city variable, i should need to generate the two exact same method. I update with the city one — Mistre83
– Mistre83, Commented Sep 22, 2016 at 7:34
Out of curiosity, what are the *Attribute() methods good for? I mean all they do is calling the second method. — simon
– simon, Commented Sep 22, 2016 at 7:40
I'm using Laravel and this is a "special" method. But the questions is about PHP, the name convention is just a Laravel feature :) — Mistre83
– Mistre83, Commented Sep 22, 2016 at 7:41

Marty · Accepted Answer · 2016-09-22 07:49:17Z

2

You can leverage __call() to do this. I'm not going to provide a full implementation but you basically want to do something like:

public function __call($name, $args) {
    // Match the name from the format "get<name>Attribute" and extract <name>.
    // Assert that <name> is in the $methods array.
    // Use <name> to call a function like $this->{'get' . $name}().

    // 2nd Alternative:

    // Match the name from the format "get<name>" and extract <name>.
    // Assert that <name> is in the $methods array.
    // Use <name> to call a function like $this->getEntityValue($name, $args[0]);
}

answered Sep 22, 2016 at 7:49

Marty

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Comments

Samuel Loog · Accepted Answer · 2016-09-22 07:42:41Z

0

Send this params(name, city or other) as parameter to universal method(if you don't know what params you can get)

public function getAttribute($value) {
  return $this->get($value);
}

public function get($value, $lang = null) {
  return $this->getEntityValue($value, $lang);
}

If you know yours parameters, you can use this:

public function getNameAttribute() {
    return $this->getName();
}
$value = 'Name'; //for example
$methodName = 'get' . $value . 'Attribute';
$this->$methodName; //call "getNameAttribute"

answered Sep 22, 2016 at 7:42

Samuel Loog

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Comments

Samuel Loog · Accepted Answer · 2016-09-22 08:06:09Z

0

Take a look at this and let me know is it your requirement or not.

$methods = ['name', 'city'];
$func = 'get'.$methods[1].'Attribute';
echo $func($methods[1]);

function getNameAttribute($func_name){
    $another_func = 'get'.$func_name;
    echo 'Name: '.$another_func();
}

function getCityAttribute($func_name){
    $another_func = 'get'.$func_name;
    echo 'City: '.$another_func();
}

function getCity(){
    return 'Dhaka';
}

function getName(){
    return 'Frayne';
}

edited Sep 22, 2016 at 8:06

Samuel Loog

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answered Sep 22, 2016 at 7:37

Murad Hasan

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