When you give an $indexkey value of -1 it preserves the associated array key values. The new index null will be converted to an empty stringīecause the function was not available in my version of PHP, I wrote my own version and extended it a little based on my needs. For example, a two-dimensional array is an array of arrays. On 7.1.21, 7.2.18, 7.4.8 ( not limited to ) will get the following results A multidimensional array is an array that has more than one dimension. The new index, null will be converted to int, and can be incremented according to the previous index, that is, if Alice "house" is also null, then Alice 's new index is "0", Jack' s new index is "1" On 5.6.30, 7.0.0, 7.2.0 ( not limited to ) get the following results If an array of objects is provided, then public properties can be. Var_dump ( array_column ( $array, null, 'house' )) A multi-dimensional array or an array of objects from which to pull a column of values from. Please note that if you use array_column to reset the index, when the index value is null, there will be different results in different PHP versions, examples
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