<?php class ColumnKeyClass { function __toString() { return 'first_name'; } } class IndexKeyClass { function __toString() { return 'id'; } } $column_key = new ColumnKeyClass(); $index_key = new IndexKeyClass(); $records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'XXX' ), array( 'id' => 3245, 'first_name' => 'Sally', 'last_name' => 'Smith' )); var_dump($column_key); var_dump($index_key); $firstNames = array_column($records, $column_key, $index_key); print_r($firstNames); var_dump($column_key); var_dump($index_key);
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Value for `_results` contains invalid data `array`