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run code in 300+ PHP versions simultaneously
<?php // Example 1 $null = null; echo $null['undefined']; // Example 2 $reference =& $undefined; // Example 3 $cookie =& $undefined ?? 'cookie'; echo $cookie . "\n"; // Example 4 $array = ['value']; $value =& $array[0]; $anotherArray = $array; $anotherArray[0] = 'surprise!'; echo $value . "\n";
Output for git.master, git.master_jit
Warning: Trying to access array offset on value of type null in /in/uZNlq on line 5 surprise!
Output for rfc.property-hooks
Warning: Trying to access array offset on null in /in/uZNlq on line 5 surprise!

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