PHP Add element to every sub array of multi dimension array

by

Whatever speed one might hope to gain by using array_walk, is lost with function overhead. Since you stated in your comments that the array is a result of a db query, you can simply include the bag value in your result set by adding SELECT 'bag' AS 'type' to your SQL statement.

$start = 0; $end = 0;

$orig = array(
    array('id' => 1,  'title' => 'title 1'),
    array('id' => 10, 'title' => 'title 10'),
    array('id' => 11, 'title' => 'title 11')
);

// A
$start = microtime(true);
for ($a=0; $a<1000; $a++) {
    $els1 = $orig;
    array_walk($els1, function(&$val, $key){$val['type'] = 'bag';});
}
$end = microtime(true);
echo 'A: ', $end - $start,  "<br />\n";

// B
$start = microtime(true);
for ($b=0; $b<1000; $b++) {
    $els2 = $orig;
    foreach ($els2 as &$el) {
        $el['type'] = 'bag';
    }
    unset($el);
}
$end = microtime(true);
echo 'B: ', $end - $start,  "<br />\n";

/* output:

A: 0.0076138973236084
B: 0.0047528743743896

A: 0.0075309276580811
B: 0.0045361518859863

A: 0.0075531005859375
B: 0.062379837036133

A: 0.0075340270996094
B: 0.0044951438903809

A: 0.0074868202209473
B: 0.0044751167297363

A: 0.0076088905334473
B: 0.0048189163208008

*/

More Related Contents:

  1. PHP multidimensional array search by value
  2. How to sum all column values in multi-dimensional array?
  3. in_array() and multidimensional array
  4. Sum values of multidimensional array by key without loop
  5. Sorting a php array of arrays by custom order
  6. Cartesian Product of N arrays
  7. How do I sort a multidimensional array by one of the fields of the inner array in PHP? [duplicate]
  8. Sort array of objects by one property
  9. String with array structure to Array [duplicate]
  10. Get difference between associative rows of two 2-dimensional arrays
  11. Implode a column of values from a two dimensional array [duplicate]
  12. Recursively remove empty elements and subarrays from a multi-dimensional array
  13. Convert flat array to the multi-dimensional
  14. PHP remove duplicate values from multidimensional array
  15. PHP combine two associative arrays into one array
  16. Check if a specific value exists at a specific key in any subarray of a multidimensional array
  17. using array_search for multi dimensional array
  18. Using array_intersect on a multi-dimensional array
  19. Dynamic array keys
  20. Converting an array from one to multi-dimensional based on parent ID values
  21. sum specific values in a multidimensional array (php)
  22. Merge two indexed arrays of indexed arrays based on first column value
  23. Group 2d array data using column value to create a 3d array
  24. Get the maximum value from an element in a multidimensional array? [duplicate]
  25. Combine two 2d arrays and have duplicate rows removed
  26. How to create multi-dimensional array from a list?
  27. Recreate original PHP array from print_r output [duplicate]
  28. Group 2d array’s row data by one column and sum another column within each group to produce a reduced 2d array
  29. Rename key in each row of a 2d array
  30. Group rows in a 2d array and count number of rows in each respective group

Leave a Comment