3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo explode('.', $domain)[0];
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Warning: Undefined variable $domain in /in/B2CW3 on line 3 Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /in/B2CW3 on line 3
Output for 8.0.0 - 8.0.30
Warning: Undefined variable $domain in /in/B2CW3 on line 3
Output for 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 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: domain in /in/B2CW3 on line 3
Output for 7.3.32 - 7.3.33
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ',' or ';' in /in/B2CW3 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ',' or ';' in /in/B2CW3 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `','' or `';'' in /in/B2CW3 on line 3
Process exited with code 255.

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