3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = 'test + string'; var_Dump(urlencode($test)); var_Dump(urldecode(urlencode($test))); var_Dump(urlencode(urlencode($test)));
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
string(15) "test+%2B+string" string(13) "test + string" string(21) "test%2B%252B%2Bstring"

preferences:
149.26 ms | 407 KiB | 5 Q