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run code in 300+ PHP versions simultaneously
<?php function test_call($first, &$a) { echo '<div>here</div>'; } function test_warning($args) { $test_call = 'test_call'; $test_call( ...$args ); // this line works $args[ 0 ] = 1; $test_call( ...$args ); // this line causes error } class TestWarningClass{ function __construct() { $args = array( 1, &$this ); test_warning($args); } } $test = new TestWarningClass;
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
<div>here</div><div>here</div>

preferences:
146.64 ms | 410 KiB | 6 Q