How do I call $greet
inside this class? I am using PHP 5.5.4.
<?PHP
class Model
{
public $greet = function($name)
{
printf("Hello %s\r\n", $name);
};
}
$test = new Model();
$test->greet('World');
$test->greet('PHP');
?>
Parse error: syntax error, unexpected '$greet' (T_VARIABLE), expecting function (T_FUNCTION)
Also tried this,
$test = new Model();
call_user_func($test->greet('World'));
call_user_func($test->greet('PHP'))
The anonymous function works fine outside the class (straight from the manual).
<?php
$greet = function($name)
{
printf("Hello %s\r\n", $name);
};
$greet('World');
$greet('PHP');
?>
EDIT: I took out the dollar signs, in my call (I caught it just as an answer started to roll in. It did not help,
call_user_func($test->greet('World'));
call_user_func($test->greet('PHP'));
EDIT:
class Model
{
public $greet;
function __construct()
{
$this->greet = function($name)
{
printf("Hello %s\r\n", $name);
};
}
}
$test = new Model();
$test->greet('johnny');
Now I get,
Fatal error: Call to undefined method Model::greet()
The fact that you call
greet
makes PHP treat it like a function and not a property. You can have the same name for both a property and method in PHP, so the distinction is relevant.PHP 7+
In PHP7 the
__call()
method is no longer needed to call closures bound to properties, because of Uniform Variable Syntax. This will allow you to add parentheses around any code, just like you do in arithmetics.PHP 5
What you can doe as a workaround is use the
__call()
magic method. It will catch the call to the undefinedgreet
method.