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run code in 300+ PHP versions simultaneously
<?php $str = 'a:39:{s:14:"login_bg_color" --nn-- s:14:"nav_wrap_color";s:7:"#1b2831";'; $output = explode("--nn--", $str); var_dump($output);
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 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> string(28) "a:39:{s:14:"login_bg_color" " [1]=> string(37) " s:14:"nav_wrap_color";s:7:"#1b2831";" }

preferences:
301.43 ms | 406 KiB | 421 Q