3v4l.org

run code in 300+ PHP versions simultaneously
<?php putenv("TEST=PHP_SELF"); $test = getenv("TEST"); echo "TEST = " .$test." "; putenv("TEST1=$TEST"); $test1 = getenv("TEST1"); echo "TEST1 = " .$test1;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
TEST = PHP_SELF Warning: Undefined variable $TEST in /in/Y1FKq on line 5 TEST1 =
Output for 5.0.4 - 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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
TEST = PHP_SELF Notice: Undefined variable: TEST in /in/Y1FKq on line 5 TEST1 =
Output for 7.3.32 - 7.3.33
TEST = PHP_SELF TEST1 =
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
TEST = PHP_SELF Notice: Undefined variable: TEST in /in/Y1FKq on line 5 TEST1 =
preferences:
215.66 ms | 402 KiB | 314 Q