Simple implementation method of Array_column function in PHP _php skills

This article illustrates the simple implementation method of Array_column function in PHP. Share to everyone for your reference, specific as follows:

array_column () in PHP returns the value of a single column in the input array .

Example:

<?php
//Returns an array from the database:
$a = array (
  ' id ' => 0015, ' Age
  ' => ', '
  name ' => ' Tom ') ,
 ),
 array (
  ' id ' => 0016,
  ' age ' => ', '
  name ' => ' Jack ',
 ),
 Array (
  ' id ' => 0017,
  ' age ' => ',
  ' name ' => ' Martin ',)
;
$names = Array_column ($a, ' name ');
Print_r ($names);
/*
output:
Array
(
 [0] => Tom
 [1] => Jack
 [2] => Martin
) * *
?>

Although PHP's Array_column function works very well, but the lower version does not have this function, then it is only possible to implement one for yourself:

if (!function_exists ("Array_column")) {
  function Array_column (array & $rows, $column _key, $index _key = null) { c2/> $data = Array ();
    if (Empty ($index _key)) {
      foreach ($rows as $row) {
        $data [] = $row [$column _key];
      }
    } else {
      foreach ($ Rows as $row) {
        $data [$row [$index _key]] = $row [$column _key];
      }
    }
    return $data;
  }

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I hope this article will help you with the PHP program design.