php array_map uses a custom function to process each value in the array

array_map applies the callback function to the cells of the given array.

Description

array array_map ( callable $callback , array $arr1 [, array $... ] )

array_map() function converts user-defined functions Applies to each value in the array and returns the array with the new values ​​after the user-defined function is applied.

The number of parameters accepted by the callback function should be consistent with the number of arrays passed to the array_map() function.

Parameter introduction:

Return value

Returns an array, each element of the array is in the array (arr1) Each element is processed through a callback function.

Example:

<?php
 function cube ( $n )
{
  return( $n * $n * $n );
}
 
 $a = array( 1 , 2 , 3 , 4 , 5 );
 $b = array_map ( "cube" , $a );
 print_r ( $b );
 ?>

Online operation

Output result:

Array
(
  [0] => 1
  [1] => 8
  [2] => 27
  [3] => 64
  [4] => 125
)

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