3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Topics {} // encode $array = new Topics(); $encode = (serialize($array)); echo $encode, PHP_EOL; echo base64_encode(gzcompress($encode)), PHP_EOL, PHP_EOL, PHP_EOL;
Output for 5.0.2 - 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 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
O:6:"Topics":0:{} eJzztzKzUgrJL8hMLlayMrCqrgUALNIFTA==
Output for 5.0.0 - 5.0.1
O:6:"Topics":0:{} Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 7 PHP_EOLeJzztzKzUgrJL8hMLlayMrCqrgUALNIFTA== Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9
O:6:"topics":0:{} eJzztzKzUirJL8hMLlayMrCqrgUALlIFbA==
Output for 4.3.0 - 4.3.9
O:6:"topics":0:{} Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 7 PHP_EOLeJzztzKzUirJL8hMLlayMrCqrgUALlIFbA== Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/3XQ1A on line 8 PHP_EOL
preferences:
333.12 ms | 402 KiB | 399 Q