How can the array_keys() function in PHP be used effectively to retrieve column names from a multidimensional array?

When working with multidimensional arrays in PHP, you may need to retrieve the column names of the array. The array_keys() function can be used effectively to achieve this by passing the multidimensional array and specifying the level at which you want to retrieve the keys. By using array_keys() with the appropriate parameters, you can easily extract the column names from a multidimensional array. 

// Sample multidimensional array
$multiArray = array(
    array('id' => 1, 'name' => 'John', 'age' => 25),
    array('id' => 2, 'name' => 'Jane', 'age' => 30)
);

// Retrieve column names from the first level of the multidimensional array
$columnNames = array_keys($multiArray[0]);

print_r($columnNames);

Keywords

array_keys PHP multidimensional array column names retrieve

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