3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = "variable"; $a = "double-quoted string"; $b = 'single-quoted string'; $c = "double-quoted without " . $var; $d = "double-quoted with simple $var"; $e = "double-quoted with complex {$var} 1"; $f = "double-quoted with complex ${var} 2";
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/6OFgd on line 10
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
preferences:
229.56 ms | 405 KiB | 345 Q