3v4l.org

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<?php echo array_reduce(array(1,2,3,4,5),.,"");
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.20
Parse error: syntax error, unexpected '.' in /in/49Ypn on line 3
Process exited with code 255.
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178.77 ms | 1395 KiB | 56 Q