Home > Article > Backend Development > How to delete multidimensional array in php
php method to delete a multi-dimensional array: first create a PHP sample file; then delete the specified key-value pairs in the complex multi-dimensional array through the unsetMultiKeys method; finally check the running results.
Recommended: "PHP Video Tutorial"
php deletes values in multi-dimensional arrays
I found in the manual that after the transformation, it became a function that can delete specified key-value pairs in complex multi-dimensional arrays!
<?php
$arr = [
'test' => 'value',
'level_one' => [
'level_two' => [
'level_three' => [
'replace_this_array' => [
'special_key' => 'replacement_value',
'key_one' => 'testing',
'key_two' => 'value',
'four' => 'another value',
],
],
'ordinary_key' => 'value',
],
],
];
$unset = array('special_key', 'ordinary_key', 'four');
echo "<pre class="brush:php;toolbar:false">";
print_r(unsetMultiKeys($unset, $arr));
print_r($arr);
echo "";
exit;
function unsetMultiKeys($unset, $array) {
$arrayIterator = new \RecursiveArrayIterator($array);
$recursiveIterator = new \RecursiveIteratorIterator($arrayIterator, \RecursiveIteratorIterator::SELF_FIRST);
foreach ($recursiveIterator as $key => $value) {
foreach ($unset as $v) {
if (is_array($value) && array_key_exists($v, $value)) {
// 删除不要的值
unset($value[$v]);
// Get the current depth and traverse back up the tree, saving the modifications
$currentDepth = $recursiveIterator->getDepth();
for ($subDepth = $currentDepth; $subDepth >= 0; $subDepth--) {
// Get the current level iterator
$subIterator = $recursiveIterator->getSubIterator($subDepth);
// If we are on the level we want to change, use the replacements ($value) other wise set the key to the parent iterators value
$subIterator->offsetSet($subIterator->key(), ($subDepth === $currentDepth ? $value : $recursiveIterator->getSubIterator(($subDepth + 1))->getArrayCopy()));
}
}
}
}
return $recursiveIterator->getArrayCopy();
}Run result:
Change the key-value pairs in the multi-dimensional array
The above is the detailed content of How to delete multidimensional array in php. For more information, please follow other related articles on the PHP Chinese website!