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run code in 300+ PHP versions simultaneously
<?php $array = [ ['1,2,1,23,5,2'], ['1,1,1,2,3,2'], ['2,3,4,2'], ]; $result[0] = implode(',', array_column($array, 0)); var_export($result);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => '1,2,1,23,5,2,1,1,1,2,3,2,2,3,4,2', )

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