Calls the callback function to the unit of the given array.

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

Array_map () returns an array containingarr1All units incallbackThe Unit after the function.

　　　　　　　callbackThe number of accepted parameters should be the same as the number of arrays passed to the array_map () function.

Function fun ($ n) {return $ N * $ N;} $ A = array (1, 2, 3, 4, 5 ); $ B = array_map ('fun ', $ A);/* Each array Unit performs a cubic operation and returns an array */print_r ($ B );
/*
Array

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

Array_map ('unlink', glob ('*. txt '));/* Glob returns an array composed of "file name .txt" and then deletes each file */

array_map(‘unlink‘, glob(‘*.*‘));

array_map(‘unlink‘, glob(‘*‘));

If array_map () is not used, operations on each cell in the array can only be traversed and assembled as appropriate.

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