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phpfunctionvariablesglobal-variables

Get variables from the outside, inside a function in PHP

I'm trying to figure out how I can use a variable that has been set outside a function, inside a function. Is there any way of doing this? I've tried to set the variable to "global" but it doesn't seems to work out as expected.

A simple example of my code

$var = '1';

function() {
    $var + 1;
    return $var;
}

I want this to return the value of 2.

Solution

  • Technically the global keyword is used inside a function, not outside.

    But you shouldn't really use this approach. See Why global variables are evil. Instead, pass a variable as a parameter:

    function($param) {
    $param += 1;
    return $param;
}
$var = 1;
$var = function($var); // get your value of 2