3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 5.4.0 - 5.4.45, 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 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
Array ( [0] => key_1000_0 [1] => key_1000_2 [3] => key_1000_4 [4] => key_1000_5 [2] => key_1000_7 ) Array ( [4] => key_1001_0 [0] => key_1001_1 [3] => key_1001_5 [1] => key_1001_8 [2] => key_1001_10 ) Array ( [1] => key_1002_0 [0] => key_1002_1 [3] => key_1002_2 [2] => key_1002_3 [4] => key_1002_21 ) Array ( [0] => key_1003_0 [2] => key_1003_1 [3] => key_1003_7 [4] => key_1003_9 [1] => key_1003_15 ) Array ( [0] => key_1004_0 [1] => key_1004_1 [4] => key_1004_2 [3] => key_1004_4 [2] => key_1004_12 )
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 '[' in /in/VjLpr on line 6
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 '[' in /in/VjLpr on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VjLpr on line 6
Process exited with code 255.

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