Online PHP editor | refs for iKCsh

<?php if (!function_exists('array_column')) { function array_column($input, $column_key, $index_key = null) { if ($index_key !== null) { // Collect the keys $keys = array(); $i = 0; // Counter for numerical keys when key does not exist foreach ($input as $row) { if (array_key_exists($index_key, $row)) { // Update counter for numerical keys if (is_numeric($row[$index_key]) || is_bool($row[$index_key])) { $i = max($i, (int) $row[$index_key] + 1); } // Get the key from a single column of the array $keys[] = $row[$index_key]; } else { // The key does not exist, use numerical indexing $keys[] = $i++; } } } if ($column_key !== null) { // Collect the values $values = array(); $i = 0; // Counter for removing keys foreach ($input as $row) { if (array_key_exists($column_key, $row)) { // Get the values from a single column of the input array $values[] = $row[$column_key]; $i++; } elseif (isset($keys)) { // Values does not exist, also drop the key for it array_splice($keys, $i, 1); } } } else { // Get the full arrays $values = array_values($input); } if ($index_key !== null) { return array_combine($keys, $values); } return $values; } echo "Custom array_column()"; } $records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'Doe', ), array( 'id' => 3245, 'first_name' => 'Sally', 'last_name' => 'Smith', ), array( 'id' => 5342, 'first_name' => 'Jane', 'last_name' => 'Jones', ), array( 'id' => 5623, 'first_name' => 'Peter', 'last_name' => 'Doe', ) ); $start = microtime(true); for ($i=0;$i<9999;$i++) { array_column($records, 'first_name'); } $end = microtime(true); echo $end-$start."\n";