i have this class (simple one just for example):
<?
class Test {
public function test1($a) {
$gen = function() {
$gen = function() {
global $a; // no effect
echo 'a='. $a; // how could i access $a from test1 parameter without passing?
};
$gen();
};
$gen();
}
};
$x = new Test();
$x->test1(123);
is there a way to access $a from test1 paramter inside last $gen function without passing it to the $gen() function?
Anonymous functions in PHP don't have an implicit variable scope like JavaScript does, so you need to specify which variables from the parent scope are needed. You do this with the use syntax:
$var = 123;
$fn = function() use ($var) {
// you can use $var here
}
$fn();
See also: Closures and scoping
You are missing the use statement. Refere to the 3rd example on PHP's documentation on closures.
This will work:
<?php
class Test {
public function test1($a) {
$gen = function() use ($a) {
$gen = function() use($a) {
echo 'a='. $a; // how could i access $a from test1 parameter without passing?
};
$gen();
};
$gen();
}
};
$x = new Test();
$x->test1(123);
123to the function. See the example codepad.viper-7.com/8koTDz