3v4l.org

run code in 300+ PHP versions simultaneously
<?php $clasa = 'HHH'; $length = '100'; $width = 200; $depth = 300; $string1 = '{{clasa}}{{length}}{{width}}'; $string2 = '{{clasa}}{{lenght}}{{depth}}'; $string3 = '{{clasa}}_word{{lenght}},anything{{depth}}'; //$new1 = preg_replace('/{{([a-zA-Z\_\-]*?)}}/', ${'"$1"'}, $string1); $new1 = preg_replace_callback("/{{([a-zA-Z\_\-]*?)}}/", function($m){ global ${$m["1"]}; return ${$m["1"]}; }, $string1); echo $new1;
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.2.19, 8.3.0 - 8.3.7
HHH100200

preferences:
266.75 ms | 404 KiB | 332 Q