3v4l.org

run code in 300+ PHP versions simultaneously
<?php $handle = fopen ('php://temp', 'r'); var_dump(fwrite($handle, 'test'));
Output for 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
bool(false)
Output for 5.2.7 - 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 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
int(0)
Output for 5.1.4 - 5.1.6, 5.2.0 - 5.2.6
int(4)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.3
Warning: fopen(php://temp): failed to open stream: Inappropriate ioctl for device in /in/Xa0Bs on line 3 Warning: fwrite(): supplied argument is not a valid stream resource in /in/Xa0Bs on line 4 bool(false)
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9
Warning: fopen(php://temp): failed to open stream: Success in /in/Xa0Bs on line 3 Warning: fwrite(): supplied argument is not a valid stream resource in /in/Xa0Bs on line 4 bool(false)
Output for 4.3.3 - 4.3.4
Warning: fopen(php://temp): failed to open stream: Success in /in/Xa0Bs on line 3 Warning: fwrite(): supplied argument is not a valid stream resource in /in/Xa0Bs on line 4 NULL
Output for 4.3.2
Warning: fopen(php://temp): failed to open stream: Inappropriate ioctl for device in /in/Xa0Bs on line 3 Warning: fwrite(): supplied argument is not a valid stream resource in /in/Xa0Bs on line 4 NULL
Output for 4.3.0 - 4.3.1
Warning: fopen(php://temp) [http://www.php.net/function.fopen]: failed to create stream: Inappropriate ioctl for device in /in/Xa0Bs on line 3 Warning: fwrite(): supplied argument is not a valid stream resource in /in/Xa0Bs on line 4 NULL

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