3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Everything you enter here will be executed by our servers. Try it! $q1 = 1; $q2 = 2; $q3 = 3; $q4 = 4; $q5 = 5; echo "${q1}"; //outputs 1 for($i=1; $i<=5; $i++) { $varname = "q{$i}"; echo "$$varname"; //how to make $i work here? }
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/HedEi on line 10 1$q1$q2$q3$q4$q5
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
1$q1$q2$q3$q4$q5
preferences:
235.96 ms | 405 KiB | 329 Q