PHP extract into class variables

Question

I am using PHP 5.3 and the extract() function.

Here is a simple example of a class I am building:

private api_username;
private api_password;
private api_signature;
private version = '63.0';

public function __construct($credentials) {
    extract($credentials);

    $this->api_username = $api_username;
}

The issue is that after the extract, I have to go one by one through the variables and assign them to the class variables.

Is there a way to extract directly to the class variables so I don't have to do the item by item assignment?

Styxxy · Accepted Answer · 2013-09-23 22:49:46Z

13

If the keys of the$credentials array match exactly to the names of the private variables, you can use variable variables to accomplish this (with the key as the variable).

public function __construct($credentials) {
    foreach($credentials as $key => $value) {
        $this->$key = $value;
    }
}

Though, make sure the array you pass in, has the correct keys.

answered Sep 23, 2013 at 22:49

Styxxy

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Comments

zamnuts · Accepted Answer · 2013-09-23 22:51:56Z

2

This probably isn't safe to do, and the method you're using goes against most accepted models, but:

foreach ( $credentials as $key => $value ) {
    if ( property_exists($this,$key) ) {
        $this->$key = $value;
    }
}

answered Sep 23, 2013 at 22:51

zamnuts

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1 Comment

Lee Loftiss Over a year ago

'the method you're using goes against most accepted models' Perhaps. But I have found that PHP is very good about stretching the definition of 'accepted models'.

psxmod · Accepted Answer · 2013-09-23 22:58:13Z

0

you can try this :

extract($credentials, EXTR_REFS);
foreach ($credentials as $key => $value) {
      $this->$key = $$key;
}

answered Sep 23, 2013 at 22:58

psxmod

1

2 Comments

Styxxy Over a year ago

Why go through the trouble of extracting and using double variable variables to get the value, while you have the value in a single variable of your loop?

psxmod Over a year ago

indeed, $this->$key = $value;

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