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run code in 300+ PHP versions simultaneously
<?php $m = 1; //$foo = &$GLOBALS; $GLOBALS = array(); $GLOBALS["m"] = 2; var_dump($m); $m++; var_dump($foo);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: $GLOBALS can only be modified using the $GLOBALS[$name] = $value syntax in /in/nqtpq on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30
int(1) Warning: Undefined variable $foo in /in/nqtpq on line 9 NULL
Output for 5.0.4 - 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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
int(1) Notice: Undefined variable: foo in /in/nqtpq on line 9 NULL
Output for 7.3.32 - 7.3.33
int(1) NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
int(1) Notice: Undefined variable: foo in /in/nqtpq on line 9 NULL

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