Online PHP editor | output for El5Xs

Output for 4.3.0
Output for 4.4.5 - 4.4.9: Warning: fopen(php://memory): failed to open stream: Success in /in/El5Xs on line 4 Fatal error: Call to undefined function: fputcsv() in /in/El5Xs on line 5
Process exited with code 255.
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.4: Warning: fopen(php://memory): failed to open stream: Success in /in/El5Xs on line 4 Fatal error: Call to undefined function: fputcsv() in /in/El5Xs on line 5
Process exited with code 255.
Output for 4.3.2: Warning: fopen(php://memory): failed to open stream: Inappropriate ioctl for device in /in/El5Xs on line 4 Fatal error: Call to undefined function: fputcsv() in /in/El5Xs on line 5
Process exited with code 255.
Output for 4.3.1: Warning: fopen(php://memory) [http://www.php.net/function.fopen]: failed to create stream: Inappropriate ioctl for device in /in/El5Xs on line 4 Fatal error: Call to undefined function: fputcsv() in /in/El5Xs on line 5
Output for 5.0.0 - 5.0.5: Warning: fopen(php://memory): failed to open stream: Inappropriate ioctl for device in /in/El5Xs on line 4 Fatal error: Call to undefined function fputcsv() in /in/El5Xs on line 5
Process exited with code 255.
Output for 5.1.4 - 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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35: string(13) ""a""b","a\"b""
Output for 5.1.0 - 5.1.3: Warning: fopen(php://memory): failed to open stream: Inappropriate ioctl for device in /in/El5Xs on line 4 Warning: fputcsv() expects parameter 1 to be resource, boolean given in /in/El5Xs on line 5 Warning: rewind(): supplied argument is not a valid stream resource in /in/El5Xs on line 6 Warning: stream_get_contents() expects parameter 1 to be resource, boolean given in /in/El5Xs on line 7 string(0) "" Warning: fclose(): supplied argument is not a valid stream resource in /in/El5Xs on line 8
Output for 8.4.1 - 8.4.26, 8.5.0 - 8.5.11: Deprecated: fputcsv(): the $escape parameter must be provided as its default value will change in /in/El5Xs on line 5 string(13) ""a""b","a\"b""