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run code in 300+ PHP versions simultaneously
<?php header("Test1: 1\x0a\x20Test2: 2");
based on 8anW8
Output for 5.4.38 - 5.4.45, 5.5.22 - 5.5.38, 5.6.6 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.24, 7.4.0 - 7.4.13, 8.0.0
Warning: Header may not contain more than a single header, new line detected in /in/rVuSs on line 3
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.37, 5.5.0 - 5.5.21, 5.6.0 - 5.6.5