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<?php $samples=array( array('a1','a2'), array('b1','b2'), array('c1','c2') ); $names = array_column($samples, [0]); print_r($names);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_column(): Argument #2 ($column_key) must be of type string|int|null, array given in /in/u3MHa:7 Stack trace: #0 /in/u3MHa(7): array_column(Array, Array) #1 {main} thrown in /in/u3MHa on line 7
Process exited with code 255.

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