3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = {'one','two','three'}; $count = count($array); return $count;
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.21
Parse error: syntax error, unexpected '{' in /in/2bBGf on line 2
Process exited with code 255.

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