3v4l.org

run code in 500+ PHP versions simultaneously
<?php function foo() { $var = 'help'; $string = "${var}"; }
Output for 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/Tj2U5 on line 5
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34
preferences:
75.89 ms | 1280 KiB | 4 Q