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run code in 300+ PHP versions simultaneously
<?php function from1($a){ return $a; } function foo(){ yield from1('foo'); }
Output for 7.0.18, 7.1.4, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Output for 7.0.0 - 7.0.17, 7.1.0 - 7.1.3
Parse error: syntax error, unexpected '(' in /in/EXjKc on line 6
Process exited with code 255.

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