3v4l.org

run code in 300+ PHP versions simultaneously
<?php $results = 'a string'; echo mysql_num_rows(results);
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function mysql_num_rows() in /in/nl5Yt:5 Stack trace: #0 {main} thrown in /in/nl5Yt on line 5
Process exited with code 255.
Output for 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
Fatal error: Call to undefined function mysql_num_rows() in /in/nl5Yt on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Notice: Use of undefined constant results - assumed 'results' in /in/nl5Yt on line 5 Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /in/nl5Yt on line 5

preferences:
264.11 ms | 402 KiB | 425 Q