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run code in 300+ PHP versions simultaneously
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Output for 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.18, 8.4.1 - 8.4.5
array(4) { ["received"]=> string(6) "line 1" ["RECEIVED"]=> string(6) "line 2" ["Received"]=> string(6) "line 3" ["Subject"]=> string(4) "test" }
Output for 7.3.32, 7.4.26, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function iconv_mime_decode_headers() in /in/G0FS2:10 Stack trace: #0 {main} thrown in /in/G0FS2 on line 10
Process exited with code 255.

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