Online PHP editor | output for gqQur

@ 2019-09-10T00:04:45Z

<?php

class Foo {
    public $prop;
    function setStr(string $x) {
        $this->prop = $x;
    }
    function setStrRef(string &$x) {
        $this->prop = &$x;
    }
    function setArray(array $arr) {
        $this->prop = $arr;
    }
}

$foo = new Foo();

$foo->setStr('abc');
var_dump($foo->prop);  // "abc"

$str = 'def';          // $str is a string
$foo->setStrRef($str);
var_dump($foo->prop);  // "def"

$arr = [];
$foo->setArray($arr);
var_dump($foo->prop);  // []
var_dump($str);        // [] - surprise! $str is now an array

Output for 7.1.25 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: string(3) "abc" string(3) "def" array(0) { } array(0) { }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(3) "abc" string(3) "def" array(0) { } array(0) { }

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