/**
* Take a multidimensional array and return a singledimensional one
* Array keys are concatenated by "."
* @param array $array
* @param string $prefix Prefix the array key
* @param string $glue
* @return array
*/
function flattenArray(array $array, $prefix = "", $glue = '.')
{
$result = [];
foreach ($array as $key => $value) {
if (is_array($value)) {
$result = array_merge($result, flattenArray($value, $prefix . $key . $glue));
} else {
$result[$prefix . $key] = $value;
}
}
return $result;
}
function flattenArray(array $array, $join = '/')
{
$oneDimArray = array();
foreach ($array as $key => $value) {
if (is_array($value)) {
$flatValues = flattenArray($value, $join);
foreach ($flatValues as $subKey => $subValue) {
$oneDimArray[$key . $join . $subKey] = $subValue;
}
} else {
$oneDimArray[$key] = $value;
}
}
return $oneDimArray;
}
function flattenArray($subarray)
{
$keys = @array_keys($subarray);
for ($i = 0; $i < count($keys); $i++) {
if (is_array($subarray[$keys[$i]])) {
flattenArray($subarray[$keys[$i]]);
} else {
$GLOBALS["tmp"]["flattenArray"][$keys[$i]] = $subarray[$keys[$i]];
}
}
}
function flattenArray($array, $prefix = '')
{
# Start with empty array
$stack = array();
# Loop through the array to flatten
foreach ($array as $key => $value) {
# Decode the input name
$key = inputDecode($key);
# Determine what the new key should be - add the current key to
# the prefix and surround in []
$newKey = $prefix ? $prefix . '[' . $key . ']' : $key;
if (is_array($value)) {
# If it's an array, recurse and merge the returned array
$stack = array_merge($stack, flattenArray($value, $newKey));
} else {
# Otherwise just add it to the current stack
$stack[$newKey] = clean($value);
}
}
# Return flattened
return $stack;
}
function flattenArray($array)
{
$flatArray = array();
foreach ($array as $subElement) {
if (is_array($subElement)) {
$flatArray = array_merge($flatArray, flattenArray($subElement));
} else {
$flatArray[] = $subElement;
}
}
return $flatArray;
}
<?php
$a = array(1, 2, array(array(3 => array(4, array(5)))), array(6, 7, 8), array(9, '{10}'));
echo implode(' ', flattenArray($a)) . PHP_EOL;
function flattenArray($arr)
{
$outputArr = array();
while (!empty($arr)) {
$e = array_shift($arr);
if (!is_array($e)) {
$outputArr[] = $e;
} else {
foreach (array_reverse($e) as $se) {
array_unshift($arr, $se);
}
}
}
return $outputArr;
}
public function testFlattenArray()
{
$multi = ['a' => 'b', 'c' => ['d' => 'e', 'f' => ['g' => 'h']]];
$single = ['a' => 'b', 'c.d' => 'e', 'c.f.g' => 'h'];
$this->assertEquals($single, flattenArray($multi));
}
