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<?php $a = 1; $b = 2; [$b,$a] = [$a,$b]; echo $a,' ', $b;
Output for 7.1.0, 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.7
2 1
Output for 7.0.0
Parse error: syntax error, unexpected '=' in /in/q62Zf on line 4
Process exited with code 255.

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