einord einord - 6 months ago 10
PHP Question

php variables in anonymous functions

I was playing around with anonymous functions in PHP and realized that they don't seem to reach variables outside of them.
Is there any way to get around this problem?

Example:

$variable = "nothing";

functionName(someArgument, function() {
$variable = "something";
});

echo $variable;


Will output: "nothing". Is there any way that the anonymous function can access the $variable?

Answer

Yes, use a closure:

functionName(someArgument, function() use( &$variable) {
  $variable = "something";
});

Note that in order for you to be able to modify $variable and retrieve the modified value outside of the scope of the anonymous function, it must be referenced in the closure using &.

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